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arch/arm/mach-u300/Kconfig

@@ -0,0 +1,44 @@
+menuconfig ARCH_U300
+	bool "ST-Ericsson U300 Series"
+	depends on ARCH_MULTI_V5 && MMU
+	select ARM_AMBA
+	select ARM_VIC
+	select U300_TIMER
+	select CPU_ARM926T
+	select GPIOLIB
+	select HAVE_TCM
+	select PINCTRL
+	select PINCTRL_COH901
+	select PINCTRL_U300
+	select MFD_SYSCON
+	help
+	  Support for ST-Ericsson U300 series mobile platforms.
+
+if ARCH_U300
+
+config MACH_U300
+	depends on ARCH_U300
+	bool "U300"
+	default y
+
+config U300_DEBUG
+	depends on ARCH_U300
+	bool "Debug support for U300"
+	depends on PM
+	help
+		Debug support for U300 in sysfs, procfs etc.
+
+config MACH_U300_SPIDUMMY
+	depends on ARCH_U300
+	bool "SSP/SPI dummy chip"
+	select SPI
+	select SPI_MASTER
+	select SPI_PL022
+	help
+		This creates a small kernel module that creates a dummy
+		SPI device to be used for loopback tests. Regularly used
+		to test reference designs. If you're not testing SPI,
+		you don't need it. Selecting this will activate the
+		SPI framework and ARM PL022 support.
+
+endif

arch/arm/mach-u300/Makefile

@@ -0,0 +1,8 @@
+#
+# Makefile for the linux kernel, U300 machine.
+#
+
+obj-y		:= core.o
+
+obj-$(CONFIG_MACH_U300_SPIDUMMY)  += dummyspichip.o
+obj-$(CONFIG_REGULATOR_AB3100)    += regulator.o

arch/arm/mach-u300/core.c

@@ -0,0 +1,414 @@
+/*
+ *
+ * arch/arm/mach-u300/core.c
+ *
+ *
+ * Copyright (C) 2007-2012 ST-Ericsson SA
+ * License terms: GNU General Public License (GPL) version 2
+ * Core platform support, IRQ handling and device definitions.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <linux/kernel.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/platform_data/clk-u300.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/clocksource.h>
+#include <linux/clk.h>
+
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+
+/*
+ * These are the large blocks of memory allocated for I/O.
+ * the defines are used for setting up the I/O memory mapping.
+ */
+
+/* NAND Flash CS0 */
+#define U300_NAND_CS0_PHYS_BASE		0x80000000
+/* NFIF */
+#define U300_NAND_IF_PHYS_BASE		0x9f800000
+/* ALE, CLE offset for FSMC NAND */
+#define PLAT_NAND_CLE			(1 << 16)
+#define PLAT_NAND_ALE			(1 << 17)
+/* AHB Peripherals */
+#define U300_AHB_PER_PHYS_BASE		0xa0000000
+#define U300_AHB_PER_VIRT_BASE		0xff010000
+/* FAST Peripherals */
+#define U300_FAST_PER_PHYS_BASE		0xc0000000
+#define U300_FAST_PER_VIRT_BASE		0xff020000
+/* SLOW Peripherals */
+#define U300_SLOW_PER_PHYS_BASE		0xc0010000
+#define U300_SLOW_PER_VIRT_BASE		0xff000000
+/* Boot ROM */
+#define U300_BOOTROM_PHYS_BASE		0xffff0000
+#define U300_BOOTROM_VIRT_BASE		0xffff0000
+/* SEMI config base */
+#define U300_SEMI_CONFIG_BASE		0x2FFE0000
+
+/*
+ * AHB peripherals
+ */
+
+/* AHB Peripherals Bridge Controller */
+#define U300_AHB_BRIDGE_BASE		(U300_AHB_PER_PHYS_BASE+0x0000)
+/* Vectored Interrupt Controller 0, servicing 32 interrupts */
+#define U300_INTCON0_BASE		(U300_AHB_PER_PHYS_BASE+0x1000)
+#define U300_INTCON0_VBASE		IOMEM(U300_AHB_PER_VIRT_BASE+0x1000)
+/* Vectored Interrupt Controller 1, servicing 32 interrupts */
+#define U300_INTCON1_BASE		(U300_AHB_PER_PHYS_BASE+0x2000)
+#define U300_INTCON1_VBASE		IOMEM(U300_AHB_PER_VIRT_BASE+0x2000)
+/* Memory Stick Pro (MSPRO) controller */
+#define U300_MSPRO_BASE			(U300_AHB_PER_PHYS_BASE+0x3000)
+/* EMIF Configuration Area */
+#define U300_EMIF_CFG_BASE		(U300_AHB_PER_PHYS_BASE+0x4000)
+
+/*
+ * FAST peripherals
+ */
+
+/* FAST bridge control */
+#define U300_FAST_BRIDGE_BASE		(U300_FAST_PER_PHYS_BASE+0x0000)
+/* MMC/SD controller */
+#define U300_MMCSD_BASE			(U300_FAST_PER_PHYS_BASE+0x1000)
+/* PCM I2S0 controller */
+#define U300_PCM_I2S0_BASE		(U300_FAST_PER_PHYS_BASE+0x2000)
+/* PCM I2S1 controller */
+#define U300_PCM_I2S1_BASE		(U300_FAST_PER_PHYS_BASE+0x3000)
+/* I2C0 controller */
+#define U300_I2C0_BASE			(U300_FAST_PER_PHYS_BASE+0x4000)
+/* I2C1 controller */
+#define U300_I2C1_BASE			(U300_FAST_PER_PHYS_BASE+0x5000)
+/* SPI controller */
+#define U300_SPI_BASE			(U300_FAST_PER_PHYS_BASE+0x6000)
+/* Fast UART1 on U335 only */
+#define U300_UART1_BASE			(U300_FAST_PER_PHYS_BASE+0x7000)
+
+/*
+ * SLOW peripherals
+ */
+
+/* SLOW bridge control */
+#define U300_SLOW_BRIDGE_BASE		(U300_SLOW_PER_PHYS_BASE)
+/* SYSCON */
+#define U300_SYSCON_BASE		(U300_SLOW_PER_PHYS_BASE+0x1000)
+#define U300_SYSCON_VBASE		IOMEM(U300_SLOW_PER_VIRT_BASE+0x1000)
+/* Watchdog */
+#define U300_WDOG_BASE			(U300_SLOW_PER_PHYS_BASE+0x2000)
+/* UART0 */
+#define U300_UART0_BASE			(U300_SLOW_PER_PHYS_BASE+0x3000)
+/* APP side special timer */
+#define U300_TIMER_APP_BASE		(U300_SLOW_PER_PHYS_BASE+0x4000)
+#define U300_TIMER_APP_VBASE		IOMEM(U300_SLOW_PER_VIRT_BASE+0x4000)
+/* Keypad */
+#define U300_KEYPAD_BASE		(U300_SLOW_PER_PHYS_BASE+0x5000)
+/* GPIO */
+#define U300_GPIO_BASE			(U300_SLOW_PER_PHYS_BASE+0x6000)
+/* RTC */
+#define U300_RTC_BASE			(U300_SLOW_PER_PHYS_BASE+0x7000)
+/* Bus tracer */
+#define U300_BUSTR_BASE			(U300_SLOW_PER_PHYS_BASE+0x8000)
+/* Event handler (hardware queue) */
+#define U300_EVHIST_BASE		(U300_SLOW_PER_PHYS_BASE+0x9000)
+/* Genric Timer */
+#define U300_TIMER_BASE			(U300_SLOW_PER_PHYS_BASE+0xa000)
+/* PPM */
+#define U300_PPM_BASE			(U300_SLOW_PER_PHYS_BASE+0xb000)
+
+/*
+ * REST peripherals
+ */
+
+/* ISP (image signal processor) */
+#define U300_ISP_BASE			(0xA0008000)
+/* DMA Controller base */
+#define U300_DMAC_BASE			(0xC0020000)
+/* MSL Base */
+#define U300_MSL_BASE			(0xc0022000)
+/* APEX Base */
+#define U300_APEX_BASE			(0xc0030000)
+/* Video Encoder Base */
+#define U300_VIDEOENC_BASE		(0xc0080000)
+/* XGAM Base */
+#define U300_XGAM_BASE			(0xd0000000)
+
+/*
+ * SYSCON addresses applicable to the core machine.
+ */
+
+/* Chip ID register 16bit (R/-) */
+#define U300_SYSCON_CIDR					(0x400)
+/* SMCR */
+#define U300_SYSCON_SMCR					(0x4d0)
+#define U300_SYSCON_SMCR_FIELD_MASK				(0x000e)
+#define U300_SYSCON_SMCR_SEMI_SREFACK_IND			(0x0008)
+#define U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE			(0x0004)
+#define U300_SYSCON_SMCR_SEMI_EXT_BOOT_MODE_ENABLE		(0x0002)
+/* CPU_SW_DBGEN Software Debug Enable 16bit (R/W) */
+#define U300_SYSCON_CSDR					(0x4f0)
+#define U300_SYSCON_CSDR_SW_DEBUG_ENABLE			(0x0001)
+/* PRINT_CONTROL Print Control 16bit (R/-) */
+#define U300_SYSCON_PCR						(0x4f8)
+#define U300_SYSCON_PCR_SERV_IND				(0x0001)
+/* BOOT_CONTROL 16bit (R/-) */
+#define U300_SYSCON_BCR						(0x4fc)
+#define U300_SYSCON_BCR_ACC_CPU_SUBSYS_VINITHI_IND		(0x0400)
+#define U300_SYSCON_BCR_APP_CPU_SUBSYS_VINITHI_IND		(0x0200)
+#define U300_SYSCON_BCR_EXTRA_BOOT_OPTION_MASK			(0x01FC)
+#define U300_SYSCON_BCR_APP_BOOT_SERV_MASK			(0x0003)
+
+static void __iomem *syscon_base;
+
+/*
+ * Static I/O mappings that are needed for booting the U300 platforms. The
+ * only things we need are the areas where we find the timer, syscon and
+ * intcon, since the remaining device drivers will map their own memory
+ * physical to virtual as the need arise.
+ */
+static struct map_desc u300_io_desc[] __initdata = {
+	{
+		.virtual	= U300_SLOW_PER_VIRT_BASE,
+		.pfn		= __phys_to_pfn(U300_SLOW_PER_PHYS_BASE),
+		.length		= SZ_64K,
+		.type		= MT_DEVICE,
+	},
+	{
+		.virtual	= U300_AHB_PER_VIRT_BASE,
+		.pfn		= __phys_to_pfn(U300_AHB_PER_PHYS_BASE),
+		.length		= SZ_32K,
+		.type		= MT_DEVICE,
+	},
+	{
+		.virtual	= U300_FAST_PER_VIRT_BASE,
+		.pfn		= __phys_to_pfn(U300_FAST_PER_PHYS_BASE),
+		.length		= SZ_32K,
+		.type		= MT_DEVICE,
+	},
+};
+
+static void __init u300_map_io(void)
+{
+	iotable_init(u300_io_desc, ARRAY_SIZE(u300_io_desc));
+}
+
+static unsigned long pin_pullup_conf[] = {
+	PIN_CONF_PACKED(PIN_CONFIG_BIAS_PULL_UP, 1),
+};
+
+static unsigned long pin_highz_conf[] = {
+	PIN_CONF_PACKED(PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0),
+};
+
+/* Pin control settings */
+static struct pinctrl_map __initdata u300_pinmux_map[] = {
+	/* anonymous maps for chip power and EMIFs */
+	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "power"),
+	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif0"),
+	PIN_MAP_MUX_GROUP_HOG_DEFAULT("pinctrl-u300", NULL, "emif1"),
+	/* per-device maps for MMC/SD, SPI and UART */
+	PIN_MAP_MUX_GROUP_DEFAULT("mmci",  "pinctrl-u300", NULL, "mmc0"),
+	PIN_MAP_MUX_GROUP_DEFAULT("pl022", "pinctrl-u300", NULL, "spi0"),
+	PIN_MAP_MUX_GROUP_DEFAULT("uart0", "pinctrl-u300", NULL, "uart0"),
+	/* This pin is used for clock return rather than GPIO */
+	PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO APP GPIO 11",
+				    pin_pullup_conf),
+	/* This pin is used for card detect */
+	PIN_MAP_CONFIGS_PIN_DEFAULT("mmci", "pinctrl-u300", "PIO MS INS",
+				    pin_highz_conf),
+};
+
+struct db_chip {
+	u16 chipid;
+	const char *name;
+};
+
+/*
+ * This is a list of the Digital Baseband chips used in the U300 platform.
+ */
+static struct db_chip db_chips[] __initdata = {
+	{
+		.chipid = 0xb800,
+		.name = "DB3000",
+	},
+	{
+		.chipid = 0xc000,
+		.name = "DB3100",
+	},
+	{
+		.chipid = 0xc800,
+		.name = "DB3150",
+	},
+	{
+		.chipid = 0xd800,
+		.name = "DB3200",
+	},
+	{
+		.chipid = 0xe000,
+		.name = "DB3250",
+	},
+	{
+		.chipid = 0xe800,
+		.name = "DB3210",
+	},
+	{
+		.chipid = 0xf000,
+		.name = "DB3350 P1x",
+	},
+	{
+		.chipid = 0xf100,
+		.name = "DB3350 P2x",
+	},
+	{
+		.chipid = 0x0000, /* List terminator */
+		.name = NULL,
+	}
+};
+
+static void __init u300_init_check_chip(void)
+{
+
+	u16 val;
+	struct db_chip *chip;
+	const char *chipname;
+	const char unknown[] = "UNKNOWN";
+
+	/* Read out and print chip ID */
+	val = readw(syscon_base + U300_SYSCON_CIDR);
+	/* This is in funky bigendian order... */
+	val = (val & 0xFFU) << 8 | (val >> 8);
+	chip = db_chips;
+	chipname = unknown;
+
+	for ( ; chip->chipid; chip++) {
+		if (chip->chipid == (val & 0xFF00U)) {
+			chipname = chip->name;
+			break;
+		}
+	}
+	printk(KERN_INFO "Initializing U300 system on %s baseband chip " \
+	       "(chip ID 0x%04x)\n", chipname, val);
+
+	if ((val & 0xFF00U) != 0xf000 && (val & 0xFF00U) != 0xf100) {
+		printk(KERN_ERR "Platform configured for BS335 " \
+		       " with DB3350 but %s detected, expect problems!",
+		       chipname);
+	}
+}
+
+/* Forward declare this function from the watchdog */
+void coh901327_watchdog_reset(void);
+
+static void u300_restart(enum reboot_mode mode, const char *cmd)
+{
+	switch (mode) {
+	case REBOOT_SOFT:
+	case REBOOT_HARD:
+#ifdef CONFIG_COH901327_WATCHDOG
+		coh901327_watchdog_reset();
+#endif
+		break;
+	default:
+		/* Do nothing */
+		break;
+	}
+	/* Wait for system do die/reset. */
+	while (1);
+}
+
+/* These are mostly to get the right device names for the clock lookups */
+static struct of_dev_auxdata u300_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("stericsson,pinctrl-u300", U300_SYSCON_BASE,
+		"pinctrl-u300", NULL),
+	OF_DEV_AUXDATA("stericsson,gpio-coh901", U300_GPIO_BASE,
+		"u300-gpio", NULL),
+	OF_DEV_AUXDATA("stericsson,coh901327", U300_WDOG_BASE,
+		"coh901327_wdog", NULL),
+	OF_DEV_AUXDATA("stericsson,coh901331", U300_RTC_BASE,
+		"rtc-coh901331", NULL),
+	OF_DEV_AUXDATA("stericsson,coh901318", U300_DMAC_BASE,
+		"coh901318", NULL),
+	OF_DEV_AUXDATA("stericsson,fsmc-nand", U300_NAND_IF_PHYS_BASE,
+		"fsmc-nand", NULL),
+	OF_DEV_AUXDATA("arm,primecell", U300_UART0_BASE,
+		"uart0", NULL),
+	OF_DEV_AUXDATA("arm,primecell", U300_UART1_BASE,
+		"uart1", NULL),
+	OF_DEV_AUXDATA("arm,primecell", U300_SPI_BASE,
+		"pl022", NULL),
+	OF_DEV_AUXDATA("st,ddci2c", U300_I2C0_BASE,
+		"stu300.0", NULL),
+	OF_DEV_AUXDATA("st,ddci2c", U300_I2C1_BASE,
+		"stu300.1", NULL),
+	OF_DEV_AUXDATA("arm,primecell", U300_MMCSD_BASE,
+		"mmci", NULL),
+	{ /* sentinel */ },
+};
+
+static void __init u300_init_irq_dt(void)
+{
+	struct device_node *syscon;
+	struct clk *clk;
+
+	syscon = of_find_node_by_path("/syscon@c0011000");
+	if (!syscon) {
+		pr_crit("could not find syscon node\n");
+		return;
+	}
+	syscon_base = of_iomap(syscon, 0);
+	if (!syscon_base) {
+		pr_crit("could not remap syscon\n");
+		return;
+	}
+	/* initialize clocking early, we want to clock the INTCON */
+	u300_clk_init(syscon_base);
+
+	/* Bootstrap EMIF and SEMI clocks */
+	clk = clk_get_sys("pl172", NULL);
+	BUG_ON(IS_ERR(clk));
+	clk_prepare_enable(clk);
+	clk = clk_get_sys("semi", NULL);
+	BUG_ON(IS_ERR(clk));
+	clk_prepare_enable(clk);
+
+	/* Clock the interrupt controller */
+	clk = clk_get_sys("intcon", NULL);
+	BUG_ON(IS_ERR(clk));
+	clk_prepare_enable(clk);
+
+	irqchip_init();
+}
+
+static void __init u300_init_machine_dt(void)
+{
+	u16 val;
+
+	/* Check what platform we run and print some status information */
+	u300_init_check_chip();
+
+	/* Initialize pinmuxing */
+	pinctrl_register_mappings(u300_pinmux_map,
+				  ARRAY_SIZE(u300_pinmux_map));
+
+	of_platform_default_populate(NULL, u300_auxdata_lookup, NULL);
+
+	/* Enable SEMI self refresh */
+	val = readw(syscon_base + U300_SYSCON_SMCR) |
+		U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
+	writew(val, syscon_base + U300_SYSCON_SMCR);
+}
+
+static const char * u300_board_compat[] = {
+	"stericsson,u300",
+	NULL,
+};
+
+DT_MACHINE_START(U300_DT, "U300 S335/B335 (Device Tree)")
+	.map_io		= u300_map_io,
+	.init_irq	= u300_init_irq_dt,
+	.init_time	= clocksource_probe,
+	.init_machine	= u300_init_machine_dt,
+	.restart	= u300_restart,
+	.dt_compat      = u300_board_compat,
+MACHINE_END

arch/arm/mach-u300/dummyspichip.c

@@ -0,0 +1,276 @@
+/*
+ * arch/arm/mach-u300/dummyspichip.c
+ *
+ * Copyright (C) 2007-2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * This is a dummy loopback SPI "chip" used for testing SPI.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/sysfs.h>
+#include <linux/mutex.h>
+#include <linux/spi/spi.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+/*
+ * WARNING! Do not include this pl022-specific controller header
+ * for any generic driver. It is only done in this dummy chip
+ * because we alter the chip configuration in order to test some
+ * different settings on the loopback device. Normal chip configs
+ * shall be STATIC and not altered by the driver!
+ */
+#include <linux/amba/pl022.h>
+
+struct dummy {
+	struct device *dev;
+	struct mutex lock;
+};
+
+#define DMA_TEST_SIZE 2048
+
+/* When we cat /sys/bus/spi/devices/spi0.0/looptest this will be triggered */
+static ssize_t dummy_looptest(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	struct dummy *p_dummy = dev_get_drvdata(&spi->dev);
+
+	/*
+	 * WARNING! Do not dereference the chip-specific data in any normal
+	 * driver for a chip. It is usually STATIC and shall not be read
+	 * or written to. Your chip driver should NOT depend on fields in this
+	 * struct, this is just used here to alter the behaviour of the chip
+	 * in order to perform tests.
+	 */
+	int status;
+	u8 txbuf[14] = {0xDE, 0xAD, 0xBE, 0xEF, 0x2B, 0xAD,
+			0xCA, 0xFE, 0xBA, 0xBE, 0xB1, 0x05,
+			0xF0, 0x0D};
+	u8 rxbuf[14];
+	u8 *bigtxbuf_virtual;
+	u8 *bigrxbuf_virtual;
+
+	if (mutex_lock_interruptible(&p_dummy->lock))
+		return -ERESTARTSYS;
+
+	bigtxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL);
+	if (bigtxbuf_virtual == NULL) {
+		status = -ENOMEM;
+		goto out;
+	}
+	bigrxbuf_virtual = kmalloc(DMA_TEST_SIZE, GFP_KERNEL);
+
+	/* Fill TXBUF with some happy pattern */
+	memset(bigtxbuf_virtual, 0xAA, DMA_TEST_SIZE);
+
+	/*
+	 * Force chip to 8 bit mode
+	 * WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC!
+	 */
+	spi->bits_per_word = 8;
+	/* You should NOT DO THIS EITHER */
+	spi->master->setup(spi);
+
+	/* Now run the tests for 8bit mode */
+	pr_info("Simple test 1: write 0xAA byte, read back garbage byte "
+		"in 8bit mode\n");
+	status = spi_w8r8(spi, 0xAA);
+	if (status < 0)
+		pr_warn("Simple test 1: FAILURE: spi_write_then_read failed with status %d\n",
+			status);
+	else
+		pr_info("Simple test 1: SUCCESS!\n");
+
+	pr_info("Simple test 2: write 8 bytes, read back 8 bytes garbage "
+		"in 8bit mode (full FIFO)\n");
+	status = spi_write_then_read(spi, &txbuf[0], 8, &rxbuf[0], 8);
+	if (status < 0)
+		pr_warn("Simple test 2: FAILURE: spi_write_then_read() failed with status %d\n",
+			status);
+	else
+		pr_info("Simple test 2: SUCCESS!\n");
+
+	pr_info("Simple test 3: write 14 bytes, read back 14 bytes garbage "
+		"in 8bit mode (see if we overflow FIFO)\n");
+	status = spi_write_then_read(spi, &txbuf[0], 14, &rxbuf[0], 14);
+	if (status < 0)
+		pr_warn("Simple test 3: FAILURE: failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 3: SUCCESS!\n");
+
+	pr_info("Simple test 4: write 8 bytes with spi_write(), read 8 "
+		"bytes garbage with spi_read() in 8bit mode\n");
+	status = spi_write(spi, &txbuf[0], 8);
+	if (status < 0)
+		pr_warn("Simple test 4 step 1: FAILURE: spi_write() failed with status %d\n",
+			status);
+	else
+		pr_info("Simple test 4 step 1: SUCCESS!\n");
+	status = spi_read(spi, &rxbuf[0], 8);
+	if (status < 0)
+		pr_warn("Simple test 4 step 2: FAILURE: spi_read() failed with status %d\n",
+			status);
+	else
+		pr_info("Simple test 4 step 2: SUCCESS!\n");
+
+	pr_info("Simple test 5: write 14 bytes with spi_write(), read "
+		"14 bytes garbage with spi_read() in 8bit mode\n");
+	status = spi_write(spi, &txbuf[0], 14);
+	if (status < 0)
+		pr_warn("Simple test 5 step 1: FAILURE: spi_write() failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 5 step 1: SUCCESS!\n");
+	status = spi_read(spi, &rxbuf[0], 14);
+	if (status < 0)
+		pr_warn("Simple test 5 step 2: FAILURE: spi_read() failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 5: SUCCESS!\n");
+
+	pr_info("Simple test 6: write %d bytes with spi_write(), "
+		"read %d bytes garbage with spi_read() in 8bit mode\n",
+		DMA_TEST_SIZE, DMA_TEST_SIZE);
+	status = spi_write(spi, &bigtxbuf_virtual[0], DMA_TEST_SIZE);
+	if (status < 0)
+		pr_warn("Simple test 6 step 1: FAILURE: spi_write() failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 6 step 1: SUCCESS!\n");
+	status = spi_read(spi, &bigrxbuf_virtual[0], DMA_TEST_SIZE);
+	if (status < 0)
+		pr_warn("Simple test 6 step 2: FAILURE: spi_read() failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 6: SUCCESS!\n");
+
+
+	/*
+	 * Force chip to 16 bit mode
+	 * WARNING: NEVER DO THIS IN REAL DRIVER CODE, THIS SHOULD BE STATIC!
+	 */
+	spi->bits_per_word = 16;
+	/* You should NOT DO THIS EITHER */
+	spi->master->setup(spi);
+
+	pr_info("Simple test 7: write 0xAA byte, read back garbage byte "
+		"in 16bit bus mode\n");
+	status = spi_w8r8(spi, 0xAA);
+	if (status == -EIO)
+		pr_info("Simple test 7: SUCCESS! (expected failure with "
+			"status EIO)\n");
+	else if (status < 0)
+		pr_warn("Simple test 7: FAILURE: spi_write_then_read failed with status %d\n",
+			status);
+	else
+		pr_warn("Simple test 7: FAILURE: spi_write_then_read succeeded but it was expected to fail!\n");
+
+	pr_info("Simple test 8: write 8 bytes, read back 8 bytes garbage "
+		"in 16bit mode (full FIFO)\n");
+	status = spi_write_then_read(spi, &txbuf[0], 8, &rxbuf[0], 8);
+	if (status < 0)
+		pr_warn("Simple test 8: FAILURE: spi_write_then_read() failed with status %d\n",
+			status);
+	else
+		pr_info("Simple test 8: SUCCESS!\n");
+
+	pr_info("Simple test 9: write 14 bytes, read back 14 bytes garbage "
+		"in 16bit mode (see if we overflow FIFO)\n");
+	status = spi_write_then_read(spi, &txbuf[0], 14, &rxbuf[0], 14);
+	if (status < 0)
+		pr_warn("Simple test 9: FAILURE: failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 9: SUCCESS!\n");
+
+	pr_info("Simple test 10: write %d bytes with spi_write(), "
+	       "read %d bytes garbage with spi_read() in 16bit mode\n",
+	       DMA_TEST_SIZE, DMA_TEST_SIZE);
+	status = spi_write(spi, &bigtxbuf_virtual[0], DMA_TEST_SIZE);
+	if (status < 0)
+		pr_warn("Simple test 10 step 1: FAILURE: spi_write() failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 10 step 1: SUCCESS!\n");
+
+	status = spi_read(spi, &bigrxbuf_virtual[0], DMA_TEST_SIZE);
+	if (status < 0)
+		pr_warn("Simple test 10 step 2: FAILURE: spi_read() failed with status %d (probably FIFO overrun)\n",
+			status);
+	else
+		pr_info("Simple test 10: SUCCESS!\n");
+
+	status = sprintf(buf, "loop test complete\n");
+	kfree(bigrxbuf_virtual);
+	kfree(bigtxbuf_virtual);
+ out:
+	mutex_unlock(&p_dummy->lock);
+	return status;
+}
+
+static DEVICE_ATTR(looptest, S_IRUGO, dummy_looptest, NULL);
+
+static int pl022_dummy_probe(struct spi_device *spi)
+{
+	struct dummy *p_dummy;
+	int status;
+
+	dev_info(&spi->dev, "probing dummy SPI device\n");
+
+	p_dummy = kzalloc(sizeof *p_dummy, GFP_KERNEL);
+	if (!p_dummy)
+		return -ENOMEM;
+
+	dev_set_drvdata(&spi->dev, p_dummy);
+	mutex_init(&p_dummy->lock);
+
+	/* sysfs hook */
+	status = device_create_file(&spi->dev, &dev_attr_looptest);
+	if (status) {
+		dev_dbg(&spi->dev, "device_create_file looptest failure.\n");
+		goto out_dev_create_looptest_failed;
+	}
+
+	return 0;
+
+out_dev_create_looptest_failed:
+	dev_set_drvdata(&spi->dev, NULL);
+	kfree(p_dummy);
+	return status;
+}
+
+static int pl022_dummy_remove(struct spi_device *spi)
+{
+	struct dummy *p_dummy = dev_get_drvdata(&spi->dev);
+
+	dev_info(&spi->dev, "removing dummy SPI device\n");
+	device_remove_file(&spi->dev, &dev_attr_looptest);
+	dev_set_drvdata(&spi->dev, NULL);
+	kfree(p_dummy);
+
+	return 0;
+}
+
+static const struct of_device_id pl022_dummy_dt_match[] = {
+	{ .compatible = "arm,pl022-dummy" },
+	{},
+};
+
+static struct spi_driver pl022_dummy_driver = {
+	.driver = {
+		.name	= "spi-dummy",
+		.of_match_table = pl022_dummy_dt_match,
+	},
+	.probe	= pl022_dummy_probe,
+	.remove	= pl022_dummy_remove,
+};
+
+module_spi_driver(pl022_dummy_driver);
+MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
+MODULE_DESCRIPTION("PL022 SSP/SPI DUMMY Linux driver");
+MODULE_LICENSE("GPL");

arch/arm/mach-u300/regulator.c

@@ -0,0 +1,132 @@
+/*
+ * arch/arm/mach-u300/regulator.c
+ *
+ * Copyright (C) 2009 ST-Ericsson AB
+ * License terms: GNU General Public License (GPL) version 2
+ * Handle board-bound regulators and board power not related
+ * to any devices.
+ * Author: Linus Walleij <linus.walleij@stericsson.com>
+ */
+#include <linux/device.h>
+#include <linux/signal.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/consumer.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+/* Power Management Control 16bit (R/W) */
+#define U300_SYSCON_PMCR					(0x50)
+#define U300_SYSCON_PMCR_DCON_ENABLE				(0x0002)
+#define U300_SYSCON_PMCR_PWR_MGNT_ENABLE			(0x0001)
+
+/*
+ * Regulators that power the board and chip and which are
+ * not copuled to specific drivers are hogged in these
+ * instances.
+ */
+static struct regulator *main_power_15;
+
+/*
+ * This function is used from pm.h to shut down the system by
+ * resetting all regulators in turn and then disable regulator
+ * LDO D (main power).
+ */
+void u300_pm_poweroff(void)
+{
+	sigset_t old, all;
+
+	sigfillset(&all);
+	if (!sigprocmask(SIG_BLOCK, &all, &old)) {
+		/* Disable LDO D to shut down the system */
+		if (main_power_15)
+			regulator_disable(main_power_15);
+		else
+			pr_err("regulator not available to shut down system\n");
+		(void) sigprocmask(SIG_SETMASK, &old, NULL);
+	}
+	return;
+}
+
+/*
+ * Hog the regulators needed to power up the board.
+ */
+static int __init __u300_init_boardpower(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *syscon_np;
+	struct regmap *regmap;
+	int err;
+
+	pr_info("U300: setting up board power\n");
+
+	syscon_np = of_parse_phandle(np, "syscon", 0);
+	if (!syscon_np) {
+		pr_crit("U300: no syscon node\n");
+		return -ENODEV;
+	}
+	regmap = syscon_node_to_regmap(syscon_np);
+	if (IS_ERR(regmap)) {
+		pr_crit("U300: could not locate syscon regmap\n");
+		return PTR_ERR(regmap);
+	}
+
+	main_power_15 = regulator_get(&pdev->dev, "vana15");
+
+	if (IS_ERR(main_power_15)) {
+		pr_err("could not get vana15");
+		return PTR_ERR(main_power_15);
+	}
+	err = regulator_enable(main_power_15);
+	if (err) {
+		pr_err("could not enable vana15\n");
+		return err;
+	}
+
+	/*
+	 * On U300 a special system controller register pulls up the DC
+	 * until the vana15 (LDO D) regulator comes up. At this point, all
+	 * regulators are set and we do not need power control via
+	 * DC ON anymore. This function will likely be moved whenever
+	 * the rest of the U300 power management is implemented.
+	 */
+	pr_info("U300: disable system controller pull-up\n");
+	regmap_update_bits(regmap, U300_SYSCON_PMCR,
+			   U300_SYSCON_PMCR_DCON_ENABLE, 0);
+
+	/* Register globally exported PM poweroff hook */
+	pm_power_off = u300_pm_poweroff;
+
+	return 0;
+}
+
+static int __init s365_board_probe(struct platform_device *pdev)
+{
+	return __u300_init_boardpower(pdev);
+}
+
+static const struct of_device_id s365_board_match[] = {
+	{ .compatible = "stericsson,s365" },
+	{},
+};
+
+static struct platform_driver s365_board_driver = {
+	.driver		= {
+		.name   = "s365-board",
+		.of_match_table = s365_board_match,
+	},
+};
+
+/*
+ * So at module init time we hog the regulator!
+ */
+static int __init u300_init_boardpower(void)
+{
+	return platform_driver_probe(&s365_board_driver,
+				     s365_board_probe);
+}
+
+device_initcall(u300_init_boardpower);

arch/arm/mach-uniphier/Kconfig

@@ -0,0 +1,13 @@
+config ARCH_UNIPHIER
+	bool "Socionext UniPhier SoCs"
+	depends on ARCH_MULTI_V7
+	select ARCH_HAS_RESET_CONTROLLER
+	select ARM_AMBA
+	select ARM_GLOBAL_TIMER
+	select ARM_GIC
+	select HAVE_ARM_SCU
+	select HAVE_ARM_TWD if SMP
+	select PINCTRL
+	help
+	  Support for UniPhier SoC family developed by Socionext Inc.
+	  (formerly, System LSI Business Division of Panasonic Corporation)

arch/arm/mach-uniphier/Makefile

@@ -0,0 +1 @@
+obj- += dummy.o

arch/arm/mach-ux500/Kconfig

@@ -0,0 +1,77 @@
+menuconfig ARCH_U8500
+	bool "ST-Ericsson U8500 Series"
+	depends on ARCH_MULTI_V7 && MMU
+	select AB8500_CORE
+	select ABX500_CORE
+	select ARM_AMBA
+	select ARM_ERRATA_754322
+	select ARM_ERRATA_764369 if SMP
+	select ARM_GIC
+	select CACHE_L2X0
+	select CLKSRC_NOMADIK_MTU
+	select GPIOLIB
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if SMP
+	select PINCTRL
+	select PINCTRL_ABX500
+	select PINCTRL_NOMADIK
+	select PL310_ERRATA_753970 if CACHE_L2X0
+	help
+	  Support for ST-Ericsson's Ux500 architecture
+
+if ARCH_U8500
+
+config UX500_SOC_DB8500
+	bool
+	select MFD_DB8500_PRCMU
+	select PINCTRL_DB8500
+	select PINCTRL_DB8540
+	select PINCTRL_AB8500
+	select PINCTRL_AB8505
+	select PINCTRL_AB9540
+	select PINCTRL_AB8540
+	select REGULATOR
+	select REGULATOR_DB8500_PRCMU
+	select CLKSRC_DBX500_PRCMU
+	select PM_GENERIC_DOMAINS if PM
+
+config MACH_MOP500
+	bool "U8500 Development platform, MOP500 versions"
+	select I2C
+	select I2C_NOMADIK
+	select REGULATOR
+	select REGULATOR_FIXED_VOLTAGE
+	select SOC_BUS
+	select UX500_SOC_DB8500
+	help
+	  Include support for the MOP500 development platform.
+
+config MACH_HREFV60
+	bool "U8500 Development platform, HREFv60 version"
+	select MACH_MOP500
+	help
+	  Include support for the HREFv60 new development platform.
+	  Includes HREFv70, v71 etc.
+
+config MACH_SNOWBALL
+	bool "U8500 Snowball platform"
+	select MACH_MOP500
+	help
+	  Include support for the snowball development platform.
+
+config UX500_AUTO_PLATFORM
+	def_bool y
+	select MACH_MOP500
+	help
+	  At least one platform needs to be selected in order to build
+	  a working kernel. If everything else is disabled, this
+	  automatically enables MACH_MOP500.
+
+config UX500_DEBUG_UART
+	int "Ux500 UART to use for low-level debug"
+	default 2
+	help
+	  Choose the UART on which kernel low-level debug messages should be
+	  output.
+
+endif

arch/arm/mach-ux500/Makefile

@@ -0,0 +1,12 @@
+#
+# Makefile for the linux kernel, U8500 machine.
+#
+
+obj-y				:= pm.o
+obj-$(CONFIG_UX500_SOC_DB8500)	+= cpu-db8500.o
+obj-$(CONFIG_MACH_MOP500)	+= board-mop500-audio.o
+obj-$(CONFIG_SMP)		+= platsmp.o
+obj-$(CONFIG_HOTPLUG_CPU)	+= hotplug.o
+obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o
+
+CFLAGS_hotplug.o		+= -march=armv7-a

arch/arm/mach-ux500/board-mop500-audio.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/platform_data/dma-ste-dma40.h>
+
+#include <linux/platform_data/asoc-ux500-msp.h>
+
+#include "ste-dma40-db8500.h"
+#include "board-mop500.h"
+
+static struct stedma40_chan_cfg msp0_dma_rx = {
+	.high_priority = true,
+	.dir = DMA_DEV_TO_MEM,
+	.dev_type = DB8500_DMA_DEV31_MSP0_SLIM0_CH0,
+};
+
+static struct stedma40_chan_cfg msp0_dma_tx = {
+	.high_priority = true,
+	.dir = DMA_MEM_TO_DEV,
+	.dev_type = DB8500_DMA_DEV31_MSP0_SLIM0_CH0,
+};
+
+struct msp_i2s_platform_data msp0_platform_data = {
+	.id = 0,
+	.msp_i2s_dma_rx = &msp0_dma_rx,
+	.msp_i2s_dma_tx = &msp0_dma_tx,
+};
+
+static struct stedma40_chan_cfg msp1_dma_rx = {
+	.high_priority = true,
+	.dir = DMA_DEV_TO_MEM,
+	.dev_type = DB8500_DMA_DEV30_MSP3,
+};
+
+static struct stedma40_chan_cfg msp1_dma_tx = {
+	.high_priority = true,
+	.dir = DMA_MEM_TO_DEV,
+	.dev_type = DB8500_DMA_DEV30_MSP1,
+};
+
+struct msp_i2s_platform_data msp1_platform_data = {
+	.id = 1,
+	.msp_i2s_dma_rx = NULL,
+	.msp_i2s_dma_tx = &msp1_dma_tx,
+};
+
+static struct stedma40_chan_cfg msp2_dma_rx = {
+	.high_priority = true,
+	.dir = DMA_DEV_TO_MEM,
+	.dev_type = DB8500_DMA_DEV14_MSP2,
+};
+
+static struct stedma40_chan_cfg msp2_dma_tx = {
+	.high_priority = true,
+	.dir = DMA_MEM_TO_DEV,
+	.dev_type = DB8500_DMA_DEV14_MSP2,
+	.use_fixed_channel = true,
+	.phy_channel = 1,
+};
+
+struct msp_i2s_platform_data msp2_platform_data = {
+	.id = 2,
+	.msp_i2s_dma_rx = &msp2_dma_rx,
+	.msp_i2s_dma_tx = &msp2_dma_tx,
+};
+
+struct msp_i2s_platform_data msp3_platform_data = {
+	.id		= 3,
+	.msp_i2s_dma_rx	= &msp1_dma_rx,
+	.msp_i2s_dma_tx	= NULL,
+};

arch/arm/mach-ux500/board-mop500.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef __BOARD_MOP500_H
+#define __BOARD_MOP500_H
+
+#include <linux/platform_data/asoc-ux500-msp.h>
+
+extern struct msp_i2s_platform_data msp0_platform_data;
+extern struct msp_i2s_platform_data msp1_platform_data;
+extern struct msp_i2s_platform_data msp2_platform_data;
+extern struct msp_i2s_platform_data msp3_platform_data;
+
+#endif

arch/arm/mach-ux500/cpu-db8500.c

@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2008-2009 ST-Ericsson SA
+ *
+ * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/amba/bus.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/platform_data/arm-ux500-pm.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/perf/arm_pmu.h>
+#include <linux/regulator/machine.h>
+
+#include <asm/outercache.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+
+#include "setup.h"
+
+#include "board-mop500.h"
+#include "db8500-regs.h"
+
+static int __init ux500_l2x0_unlock(void)
+{
+	int i;
+	struct device_node *np;
+	void __iomem *l2x0_base;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
+	l2x0_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!l2x0_base)
+		return -ENODEV;
+
+	/*
+	 * Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
+	 * apparently locks both caches before jumping to the kernel. The
+	 * l2x0 core will not touch the unlock registers if the l2x0 is
+	 * already enabled, so we do it right here instead. The PL310 has
+	 * 8 sets of registers, one per possible CPU.
+	 */
+	for (i = 0; i < 8; i++) {
+		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
+			       i * L2X0_LOCKDOWN_STRIDE);
+		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
+			       i * L2X0_LOCKDOWN_STRIDE);
+	}
+	iounmap(l2x0_base);
+	return 0;
+}
+
+static void ux500_l2c310_write_sec(unsigned long val, unsigned reg)
+{
+	/*
+	 * We can't write to secure registers as we are in non-secure
+	 * mode, until we have some SMI service available.
+	 */
+}
+
+/*
+ * FIXME: Should we set up the GPIO domain here?
+ *
+ * The problem is that we cannot put the interrupt resources into the platform
+ * device until the irqdomain has been added. Right now, we set the GIC interrupt
+ * domain from init_irq(), then load the gpio driver from
+ * core_initcall(nmk_gpio_init) and add the platform devices from
+ * arch_initcall(customize_machine).
+ *
+ * This feels fragile because it depends on the gpio device getting probed
+ * _before_ any device uses the gpio interrupts.
+*/
+static void __init ux500_init_irq(void)
+{
+	struct device_node *np;
+	struct resource r;
+
+	irqchip_init();
+	np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
+	of_address_to_resource(np, 0, &r);
+	of_node_put(np);
+	if (!r.start) {
+		pr_err("could not find PRCMU base resource\n");
+		return;
+	}
+	prcmu_early_init(r.start, r.end-r.start);
+	ux500_pm_init(r.start, r.end-r.start);
+
+	/* Unlock before init */
+	ux500_l2x0_unlock();
+	outer_cache.write_sec = ux500_l2c310_write_sec;
+}
+
+static void ux500_restart(enum reboot_mode mode, const char *cmd)
+{
+	local_irq_disable();
+	local_fiq_disable();
+
+	prcmu_system_reset(0);
+}
+
+/*
+ * The PMU IRQ lines of two cores are wired together into a single interrupt.
+ * Bounce the interrupt to the other core if it's not ours.
+ */
+static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
+{
+	irqreturn_t ret = handler(irq, dev);
+	int other = !smp_processor_id();
+
+	if (ret == IRQ_NONE && cpu_online(other))
+		irq_set_affinity(irq, cpumask_of(other));
+
+	/*
+	 * We should be able to get away with the amount of IRQ_NONEs we give,
+	 * while still having the spurious IRQ detection code kick in if the
+	 * interrupt really starts hitting spuriously.
+	 */
+	return ret;
+}
+
+static struct arm_pmu_platdata db8500_pmu_platdata = {
+	.handle_irq		= db8500_pmu_handler,
+};
+
+static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
+	/* Requires call-back bindings. */
+	OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
+	/* Requires DMA bindings. */
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
+		       "ux500-msp-i2s.0", &msp0_platform_data),
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
+		       "ux500-msp-i2s.1", &msp1_platform_data),
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
+		       "ux500-msp-i2s.2", &msp2_platform_data),
+	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
+		       "ux500-msp-i2s.3", &msp3_platform_data),
+	/* Requires non-DT:able platform data. */
+	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", NULL),
+	OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
+	OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
+	OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
+			NULL),
+	{},
+};
+
+static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu", NULL),
+	{},
+};
+
+static const struct of_device_id u8500_local_bus_nodes[] = {
+	/* only create devices below soc node */
+	{ .compatible = "stericsson,db8500", },
+	{ .compatible = "stericsson,db8500-prcmu", },
+	{ .compatible = "simple-bus"},
+	{ },
+};
+
+static void __init u8500_init_machine(void)
+{
+	/* automatically probe child nodes of dbx5x0 devices */
+	if (of_machine_is_compatible("st-ericsson,u8540"))
+		of_platform_populate(NULL, u8500_local_bus_nodes,
+				     u8540_auxdata_lookup, NULL);
+	else
+		of_platform_populate(NULL, u8500_local_bus_nodes,
+				     u8500_auxdata_lookup, NULL);
+}
+
+static const char * stericsson_dt_platform_compat[] = {
+	"st-ericsson,u8500",
+	"st-ericsson,u8540",
+	"st-ericsson,u9500",
+	"st-ericsson,u9540",
+	NULL,
+};
+
+DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
+	.l2c_aux_val    = 0,
+	.l2c_aux_mask	= ~0,
+	.init_irq	= ux500_init_irq,
+	.init_machine	= u8500_init_machine,
+	.dt_compat      = stericsson_dt_platform_compat,
+	.restart        = ux500_restart,
+MACHINE_END

arch/arm/mach-ux500/db8500-regs.h

@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef __MACH_DB8500_REGS_H
+#define __MACH_DB8500_REGS_H
+
+/* Base address and bank offsets for ESRAM */
+#define U8500_ESRAM_BASE	0x40000000
+#define U8500_ESRAM_BANK_SIZE	0x00020000
+#define U8500_ESRAM_BANK0	U8500_ESRAM_BASE
+#define U8500_ESRAM_BANK1	(U8500_ESRAM_BASE + U8500_ESRAM_BANK_SIZE)
+#define U8500_ESRAM_BANK2	(U8500_ESRAM_BANK1 + U8500_ESRAM_BANK_SIZE)
+#define U8500_ESRAM_BANK3	(U8500_ESRAM_BANK2 + U8500_ESRAM_BANK_SIZE)
+#define U8500_ESRAM_BANK4	(U8500_ESRAM_BANK3 + U8500_ESRAM_BANK_SIZE)
+/*
+ * on V1 DMA uses 4KB for logical parameters position is right after the 64KB
+ * reserved for security
+ */
+#define U8500_ESRAM_DMA_LCPA_OFFSET     0x10000
+
+#define U8500_DMA_LCPA_BASE    (U8500_ESRAM_BANK0 + U8500_ESRAM_DMA_LCPA_OFFSET)
+
+/* This address fulfills the 256k alignment requirement of the lcla base */
+#define U8500_DMA_LCLA_BASE	U8500_ESRAM_BANK4
+
+#define U8500_PER3_BASE		0x80000000
+#define U8500_STM_BASE		0x80100000
+#define U8500_STM_REG_BASE	(U8500_STM_BASE + 0xF000)
+#define U8500_PER2_BASE		0x80110000
+#define U8500_PER1_BASE		0x80120000
+#define U8500_B2R2_BASE		0x80130000
+#define U8500_HSEM_BASE		0x80140000
+#define U8500_PER4_BASE		0x80150000
+#define U8500_TPIU_BASE		0x80190000
+#define U8500_ICN_BASE		0x81000000
+
+#define U8500_BOOT_ROM_BASE	0x90000000
+/* ASIC ID is at 0xbf4 offset within this region */
+#define U8500_ASIC_ID_BASE	0x9001D000
+
+#define U9540_BOOT_ROM_BASE	0xFFFE0000
+/* ASIC ID is at 0xbf4 offset within this region */
+#define U9540_ASIC_ID_BASE	0xFFFFD000
+
+#define U8500_PER6_BASE		0xa03c0000
+#define U8500_PER7_BASE		0xa03d0000
+#define U8500_PER5_BASE		0xa03e0000
+
+#define U8500_SVA_BASE		0xa0100000
+#define U8500_SIA_BASE		0xa0200000
+
+#define U8500_SGA_BASE		0xa0300000
+#define U8500_MCDE_BASE		0xa0350000
+#define U8500_DMA_BASE		0x801C0000	/* v1 */
+
+#define U8500_SBAG_BASE		0xa0390000
+
+#define U8500_SCU_BASE		0xa0410000
+#define U8500_GIC_CPU_BASE	0xa0410100
+#define U8500_TWD_BASE		0xa0410600
+#define U8500_GIC_DIST_BASE	0xa0411000
+#define U8500_L2CC_BASE		0xa0412000
+
+#define U8500_MODEM_I2C		0xb7e02000
+
+#define U8500_GPIO0_BASE	(U8500_PER1_BASE + 0xE000)
+#define U8500_GPIO1_BASE	(U8500_PER3_BASE + 0xE000)
+#define U8500_GPIO2_BASE	(U8500_PER2_BASE + 0xE000)
+#define U8500_GPIO3_BASE	(U8500_PER5_BASE + 0x1E000)
+
+#define U8500_UART0_BASE	(U8500_PER1_BASE + 0x0000)
+#define U8500_UART1_BASE	(U8500_PER1_BASE + 0x1000)
+
+/* per6 base addresses */
+#define U8500_RNG_BASE		(U8500_PER6_BASE + 0x0000)
+#define U8500_HASH0_BASE        (U8500_PER6_BASE + 0x1000)
+#define U8500_HASH1_BASE        (U8500_PER6_BASE + 0x2000)
+#define U8500_PKA_BASE		(U8500_PER6_BASE + 0x4000)
+#define U8500_PKAM_BASE		(U8500_PER6_BASE + 0x5100)
+#define U8500_MTU0_BASE		(U8500_PER6_BASE + 0x6000) /* v1 */
+#define U8500_MTU1_BASE		(U8500_PER6_BASE + 0x7000) /* v1 */
+#define U8500_CR_BASE		(U8500_PER6_BASE + 0x8000) /* v1 */
+#define U8500_CRYP0_BASE	(U8500_PER6_BASE + 0xa000)
+#define U8500_CRYP1_BASE	(U8500_PER6_BASE + 0xb000)
+#define U8500_CLKRST6_BASE	(U8500_PER6_BASE + 0xf000)
+
+/* per5 base addresses */
+#define U8500_USBOTG_BASE	(U8500_PER5_BASE + 0x00000)
+#define U8500_CLKRST5_BASE	(U8500_PER5_BASE + 0x1f000)
+
+/* per4 base addresses */
+#define U8500_BACKUPRAM0_BASE	(U8500_PER4_BASE + 0x00000)
+#define U8500_BACKUPRAM1_BASE	(U8500_PER4_BASE + 0x01000)
+#define U8500_RTT0_BASE		(U8500_PER4_BASE + 0x02000)
+#define U8500_RTT1_BASE		(U8500_PER4_BASE + 0x03000)
+#define U8500_RTC_BASE		(U8500_PER4_BASE + 0x04000)
+#define U8500_SCR_BASE		(U8500_PER4_BASE + 0x05000)
+#define U8500_DMC_BASE		(U8500_PER4_BASE + 0x06000)
+#define U8500_PRCMU_BASE	(U8500_PER4_BASE + 0x07000)
+#define U9540_DMC1_BASE		(U8500_PER4_BASE + 0x0A000)
+#define U8500_PRCMU_TCDM_BASE	(U8500_PER4_BASE + 0x68000)
+#define U8500_PRCMU_TCPM_BASE   (U8500_PER4_BASE + 0x60000)
+#define U8500_PRCMU_TIMER_3_BASE (U8500_PER4_BASE + 0x07338)
+#define U8500_PRCMU_TIMER_4_BASE (U8500_PER4_BASE + 0x07450)
+
+/* per3 base addresses */
+#define U8500_FSMC_BASE		(U8500_PER3_BASE + 0x0000)
+#define U8500_SSP0_BASE		(U8500_PER3_BASE + 0x2000)
+#define U8500_SSP1_BASE		(U8500_PER3_BASE + 0x3000)
+#define U8500_I2C0_BASE		(U8500_PER3_BASE + 0x4000)
+#define U8500_SDI2_BASE		(U8500_PER3_BASE + 0x5000)
+#define U8500_SKE_BASE		(U8500_PER3_BASE + 0x6000)
+#define U8500_UART2_BASE	(U8500_PER3_BASE + 0x7000)
+#define U8500_SDI5_BASE		(U8500_PER3_BASE + 0x8000)
+#define U8500_CLKRST3_BASE	(U8500_PER3_BASE + 0xf000)
+
+/* per2 base addresses */
+#define U8500_I2C3_BASE		(U8500_PER2_BASE + 0x0000)
+#define U8500_SPI2_BASE		(U8500_PER2_BASE + 0x1000)
+#define U8500_SPI1_BASE		(U8500_PER2_BASE + 0x2000)
+#define U8500_PWL_BASE		(U8500_PER2_BASE + 0x3000)
+#define U8500_SDI4_BASE		(U8500_PER2_BASE + 0x4000)
+#define U8500_MSP2_BASE		(U8500_PER2_BASE + 0x7000)
+#define U8500_SDI1_BASE		(U8500_PER2_BASE + 0x8000)
+#define U8500_SDI3_BASE		(U8500_PER2_BASE + 0x9000)
+#define U8500_SPI0_BASE		(U8500_PER2_BASE + 0xa000)
+#define U8500_HSIR_BASE		(U8500_PER2_BASE + 0xb000)
+#define U8500_HSIT_BASE		(U8500_PER2_BASE + 0xc000)
+#define U8500_CLKRST2_BASE	(U8500_PER2_BASE + 0xf000)
+
+/* per1 base addresses */
+#define U8500_I2C1_BASE		(U8500_PER1_BASE + 0x2000)
+#define U8500_MSP0_BASE		(U8500_PER1_BASE + 0x3000)
+#define U8500_MSP1_BASE		(U8500_PER1_BASE + 0x4000)
+#define U8500_MSP3_BASE		(U8500_PER1_BASE + 0x5000)
+#define U8500_SDI0_BASE		(U8500_PER1_BASE + 0x6000)
+#define U8500_I2C2_BASE		(U8500_PER1_BASE + 0x8000)
+#define U8500_SPI3_BASE		(U8500_PER1_BASE + 0x9000)
+#define U8500_I2C4_BASE		(U8500_PER1_BASE + 0xa000)
+#define U8500_SLIM0_BASE	(U8500_PER1_BASE + 0xb000)
+#define U8500_CLKRST1_BASE	(U8500_PER1_BASE + 0xf000)
+
+#define U8500_SHRM_GOP_INTERRUPT_BASE	0xB7C00040
+
+#define U8500_GPIOBANK0_BASE	U8500_GPIO0_BASE
+#define U8500_GPIOBANK1_BASE	(U8500_GPIO0_BASE + 0x80)
+#define U8500_GPIOBANK2_BASE	U8500_GPIO1_BASE
+#define U8500_GPIOBANK3_BASE	(U8500_GPIO1_BASE + 0x80)
+#define U8500_GPIOBANK4_BASE	(U8500_GPIO1_BASE + 0x100)
+#define U8500_GPIOBANK5_BASE	(U8500_GPIO1_BASE + 0x180)
+#define U8500_GPIOBANK6_BASE	U8500_GPIO2_BASE
+#define U8500_GPIOBANK7_BASE	(U8500_GPIO2_BASE + 0x80)
+#define U8500_GPIOBANK8_BASE	U8500_GPIO3_BASE
+
+#define U8500_MCDE_SIZE		0x1000
+#define U8500_DSI_LINK_SIZE	0x1000
+#define U8500_DSI_LINK1_BASE	(U8500_MCDE_BASE + U8500_MCDE_SIZE)
+#define U8500_DSI_LINK2_BASE	(U8500_DSI_LINK1_BASE + U8500_DSI_LINK_SIZE)
+#define U8500_DSI_LINK3_BASE	(U8500_DSI_LINK2_BASE + U8500_DSI_LINK_SIZE)
+#define U8500_DSI_LINK_COUNT	0x3
+
+/* Modem and APE physical addresses */
+#define U8500_MODEM_BASE	0xe000000
+#define U8500_APE_BASE		0x6000000
+
+/* SoC identification number information */
+#define U8500_BB_UID_BASE      (U8500_BACKUPRAM1_BASE + 0xFC0)
+
+/* Offsets to specific addresses in some IP blocks for DMA */
+#define MSP_TX_RX_REG_OFFSET	0
+#define CRYP1_RX_REG_OFFSET	0x10
+#define CRYP1_TX_REG_OFFSET	0x8
+#define HASH1_TX_REG_OFFSET	0x4
+
+/*
+ * Macros to get at IO space when running virtually
+ * We dont map all the peripherals, let ioremap do
+ * this for us. We map only very basic peripherals here.
+ */
+#define U8500_IO_VIRTUAL	0xf0000000
+#define U8500_IO_PHYSICAL	0xa0000000
+/* This is where we map in the ROM to check ASIC IDs */
+#define UX500_VIRT_ROM		IOMEM(0xf0000000)
+
+/* This macro is used in assembly, so no cast */
+#define IO_ADDRESS(x)           \
+	(((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + U8500_IO_VIRTUAL)
+
+/* typesafe io address */
+#define __io_address(n)		IOMEM(IO_ADDRESS(n))
+
+/* Used by some plat-nomadik code */
+#define io_p2v(n)		__io_address(n)
+
+#define ARRAY_AND_SIZE(x)	(x), ARRAY_SIZE(x)
+
+#endif

arch/arm/mach-ux500/hotplug.c

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) STMicroelectronics 2009
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ *	Based on ARM realview platform
+ *
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com>
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+#include <asm/smp_plat.h>
+
+#include "setup.h"
+
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ * Called with IRQs disabled
+ */
+void ux500_cpu_die(unsigned int cpu)
+{
+	/* directly enter low power state, skipping secure registers */
+	for (;;) {
+		__asm__ __volatile__("dsb\n\t" "wfi\n\t"
+				: : : "memory");
+		if (pen_release == cpu_logical_map(cpu)) {
+			/*
+			 * OK, proper wakeup, we're done
+			 */
+			break;
+		}
+	}
+}

arch/arm/mach-ux500/platsmp.c

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2002 ARM Ltd.
+ * Copyright (C) 2008 STMicroelctronics.
+ * Copyright (C) 2009 ST-Ericsson.
+ * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
+ *
+ * This file is based on arm realview platform
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "setup.h"
+
+#include "db8500-regs.h"
+
+/* Magic triggers in backup RAM */
+#define UX500_CPU1_JUMPADDR_OFFSET 0x1FF4
+#define UX500_CPU1_WAKEMAGIC_OFFSET 0x1FF0
+
+static void wakeup_secondary(void)
+{
+	struct device_node *np;
+	static void __iomem *backupram;
+
+	np = of_find_compatible_node(NULL, NULL, "ste,dbx500-backupram");
+	if (!np) {
+		pr_err("No backupram base address\n");
+		return;
+	}
+	backupram = of_iomap(np, 0);
+	of_node_put(np);
+	if (!backupram) {
+		pr_err("No backupram remap\n");
+		return;
+	}
+
+	/*
+	 * write the address of secondary startup into the backup ram register
+	 * at offset 0x1FF4, then write the magic number 0xA1FEED01 to the
+	 * backup ram register at offset 0x1FF0, which is what boot rom code
+	 * is waiting for. This will wake up the secondary core from WFE.
+	 */
+	writel(virt_to_phys(secondary_startup),
+	       backupram + UX500_CPU1_JUMPADDR_OFFSET);
+	writel(0xA1FEED01,
+	       backupram + UX500_CPU1_WAKEMAGIC_OFFSET);
+
+	/* make sure write buffer is drained */
+	mb();
+	iounmap(backupram);
+}
+
+static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
+{
+	struct device_node *np;
+	static void __iomem *scu_base;
+	unsigned int ncores;
+	int i;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
+	if (!np) {
+		pr_err("No SCU base address\n");
+		return;
+	}
+	scu_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!scu_base) {
+		pr_err("No SCU remap\n");
+		return;
+	}
+
+	scu_enable(scu_base);
+	ncores = scu_get_core_count(scu_base);
+	for (i = 0; i < ncores; i++)
+		set_cpu_possible(i, true);
+	iounmap(scu_base);
+}
+
+static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	wakeup_secondary();
+	arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+	return 0;
+}
+
+static const struct smp_operations ux500_smp_ops __initconst = {
+	.smp_prepare_cpus	= ux500_smp_prepare_cpus,
+	.smp_boot_secondary	= ux500_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= ux500_cpu_die,
+#endif
+};
+CPU_METHOD_OF_DECLARE(ux500_smp, "ste,dbx500-smp", &ux500_smp_ops);

arch/arm/mach-ux500/pm.c

@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010-2013
+ * Author: Rickard Andersson <rickard.andersson@stericsson.com> for
+ *         ST-Ericsson.
+ * Author: Daniel Lezcano <daniel.lezcano@linaro.org> for Linaro.
+ * Author: Ulf Hansson <ulf.hansson@linaro.org> for Linaro.
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/suspend.h>
+#include <linux/platform_data/arm-ux500-pm.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include "db8500-regs.h"
+#include "pm_domains.h"
+
+/* ARM WFI Standby signal register */
+#define PRCM_ARM_WFI_STANDBY    (prcmu_base + 0x130)
+#define PRCM_ARM_WFI_STANDBY_WFI0		0x08
+#define PRCM_ARM_WFI_STANDBY_WFI1		0x10
+#define PRCM_IOCR		(prcmu_base + 0x310)
+#define PRCM_IOCR_IOFORCE			0x1
+
+/* Dual A9 core interrupt management unit registers */
+#define PRCM_A9_MASK_REQ	(prcmu_base + 0x328)
+#define PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ	0x1
+
+#define PRCM_A9_MASK_ACK	(prcmu_base + 0x32c)
+#define PRCM_ARMITMSK31TO0	(prcmu_base + 0x11c)
+#define PRCM_ARMITMSK63TO32	(prcmu_base + 0x120)
+#define PRCM_ARMITMSK95TO64	(prcmu_base + 0x124)
+#define PRCM_ARMITMSK127TO96	(prcmu_base + 0x128)
+#define PRCM_POWER_STATE_VAL	(prcmu_base + 0x25C)
+#define PRCM_ARMITVAL31TO0	(prcmu_base + 0x260)
+#define PRCM_ARMITVAL63TO32	(prcmu_base + 0x264)
+#define PRCM_ARMITVAL95TO64	(prcmu_base + 0x268)
+#define PRCM_ARMITVAL127TO96	(prcmu_base + 0x26C)
+
+static void __iomem *prcmu_base;
+static void __iomem *dist_base;
+
+/* This function decouple the gic from the prcmu */
+int prcmu_gic_decouple(void)
+{
+	u32 val = readl(PRCM_A9_MASK_REQ);
+
+	/* Set bit 0 register value to 1 */
+	writel(val | PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ,
+	       PRCM_A9_MASK_REQ);
+
+	/* Make sure the register is updated */
+	readl(PRCM_A9_MASK_REQ);
+
+	/* Wait a few cycles for the gic mask completion */
+	udelay(1);
+
+	return 0;
+}
+
+/* This function recouple the gic with the prcmu */
+int prcmu_gic_recouple(void)
+{
+	u32 val = readl(PRCM_A9_MASK_REQ);
+
+	/* Set bit 0 register value to 0 */
+	writel(val & ~PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ, PRCM_A9_MASK_REQ);
+
+	return 0;
+}
+
+#define PRCMU_GIC_NUMBER_REGS 5
+
+/*
+ * This function checks if there are pending irq on the gic. It only
+ * makes sense if the gic has been decoupled before with the
+ * db8500_prcmu_gic_decouple function. Disabling an interrupt only
+ * disables the forwarding of the interrupt to any CPU interface. It
+ * does not prevent the interrupt from changing state, for example
+ * becoming pending, or active and pending if it is already
+ * active. Hence, we have to check the interrupt is pending *and* is
+ * active.
+ */
+bool prcmu_gic_pending_irq(void)
+{
+	u32 pr; /* Pending register */
+	u32 er; /* Enable register */
+	int i;
+
+	/* 5 registers. STI & PPI not skipped */
+	for (i = 0; i < PRCMU_GIC_NUMBER_REGS; i++) {
+
+		pr = readl_relaxed(dist_base + GIC_DIST_PENDING_SET + i * 4);
+		er = readl_relaxed(dist_base + GIC_DIST_ENABLE_SET + i * 4);
+
+		if (pr & er)
+			return true; /* There is a pending interrupt */
+	}
+
+	return false;
+}
+
+/*
+ * This function checks if there are pending interrupt on the
+ * prcmu which has been delegated to monitor the irqs with the
+ * db8500_prcmu_copy_gic_settings function.
+ */
+bool prcmu_pending_irq(void)
+{
+	u32 it, im;
+	int i;
+
+	for (i = 0; i < PRCMU_GIC_NUMBER_REGS - 1; i++) {
+		it = readl(PRCM_ARMITVAL31TO0 + i * 4);
+		im = readl(PRCM_ARMITMSK31TO0 + i * 4);
+		if (it & im)
+			return true; /* There is a pending interrupt */
+	}
+
+	return false;
+}
+
+/*
+ * This function checks if the specified cpu is in in WFI. It's usage
+ * makes sense only if the gic is decoupled with the db8500_prcmu_gic_decouple
+ * function. Of course passing smp_processor_id() to this function will
+ * always return false...
+ */
+bool prcmu_is_cpu_in_wfi(int cpu)
+{
+	return readl(PRCM_ARM_WFI_STANDBY) &
+		(cpu ? PRCM_ARM_WFI_STANDBY_WFI1 : PRCM_ARM_WFI_STANDBY_WFI0);
+}
+
+/*
+ * This function copies the gic SPI settings to the prcmu in order to
+ * monitor them and abort/finish the retention/off sequence or state.
+ */
+int prcmu_copy_gic_settings(void)
+{
+	u32 er; /* Enable register */
+	int i;
+
+	/* We skip the STI and PPI */
+	for (i = 0; i < PRCMU_GIC_NUMBER_REGS - 1; i++) {
+		er = readl_relaxed(dist_base +
+				   GIC_DIST_ENABLE_SET + (i + 1) * 4);
+		writel(er, PRCM_ARMITMSK31TO0 + i * 4);
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_SUSPEND
+static int ux500_suspend_enter(suspend_state_t state)
+{
+	cpu_do_idle();
+	return 0;
+}
+
+static int ux500_suspend_valid(suspend_state_t state)
+{
+	return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
+}
+
+static const struct platform_suspend_ops ux500_suspend_ops = {
+	.enter	      = ux500_suspend_enter,
+	.valid	      = ux500_suspend_valid,
+};
+#define UX500_SUSPEND_OPS	(&ux500_suspend_ops)
+#else
+#define UX500_SUSPEND_OPS	NULL
+#endif
+
+void __init ux500_pm_init(u32 phy_base, u32 size)
+{
+	struct device_node *np;
+
+	prcmu_base = ioremap(phy_base, size);
+	if (!prcmu_base) {
+		pr_err("could not remap PRCMU for PM functions\n");
+		return;
+	}
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
+	dist_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!dist_base) {
+		pr_err("could not remap GIC dist base for PM functions\n");
+		return;
+	}
+
+	/*
+	 * On watchdog reboot the GIC is in some cases decoupled.
+	 * This will make sure that the GIC is correctly configured.
+	 */
+	prcmu_gic_recouple();
+
+	/* Set up ux500 suspend callbacks. */
+	suspend_set_ops(UX500_SUSPEND_OPS);
+
+	/* Initialize ux500 power domains */
+	ux500_pm_domains_init();
+}

arch/arm/mach-ux500/pm_domains.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ * License terms: GNU General Public License (GPL) version 2
+ *
+ * Implements PM domains using the generic PM domain for ux500.
+ */
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/pm_domain.h>
+
+#include <dt-bindings/arm/ux500_pm_domains.h>
+#include "pm_domains.h"
+
+static int pd_power_off(struct generic_pm_domain *domain)
+{
+	/*
+	 * Handle the gating of the PM domain regulator here.
+	 *
+	 * Drivers/subsystems handling devices in the PM domain needs to perform
+	 * register context save/restore from their respective runtime PM
+	 * callbacks, to be able to enable PM domain gating/ungating.
+	 */
+	return 0;
+}
+
+static int pd_power_on(struct generic_pm_domain *domain)
+{
+	/*
+	 * Handle the ungating of the PM domain regulator here.
+	 *
+	 * Drivers/subsystems handling devices in the PM domain needs to perform
+	 * register context save/restore from their respective runtime PM
+	 * callbacks, to be able to enable PM domain gating/ungating.
+	 */
+	return 0;
+}
+
+static struct generic_pm_domain ux500_pm_domain_vape = {
+	.name = "VAPE",
+	.power_off = pd_power_off,
+	.power_on = pd_power_on,
+};
+
+static struct generic_pm_domain *ux500_pm_domains[NR_DOMAINS] = {
+	[DOMAIN_VAPE] = &ux500_pm_domain_vape,
+};
+
+static const struct of_device_id ux500_pm_domain_matches[] __initconst = {
+	{ .compatible = "stericsson,ux500-pm-domains", },
+	{ },
+};
+
+int __init ux500_pm_domains_init(void)
+{
+	struct device_node *np;
+	struct genpd_onecell_data *genpd_data;
+	int i;
+
+	np = of_find_matching_node(NULL, ux500_pm_domain_matches);
+	if (!np)
+		return -ENODEV;
+
+	genpd_data = kzalloc(sizeof(*genpd_data), GFP_KERNEL);
+	if (!genpd_data)
+		return -ENOMEM;
+
+	genpd_data->domains = ux500_pm_domains;
+	genpd_data->num_domains = ARRAY_SIZE(ux500_pm_domains);
+
+	for (i = 0; i < ARRAY_SIZE(ux500_pm_domains); ++i)
+		pm_genpd_init(ux500_pm_domains[i], NULL, false);
+
+	of_genpd_add_provider_onecell(np, genpd_data);
+	return 0;
+}

arch/arm/mach-ux500/pm_domains.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Ulf Hansson <ulf.hansson@linaro.org>
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#ifndef __MACH_UX500_PM_DOMAINS_H
+#define __MACH_UX500_PM_DOMAINS_H
+
+#ifdef CONFIG_PM_GENERIC_DOMAINS
+extern int __init ux500_pm_domains_init(void);
+#else
+static inline int ux500_pm_domains_init(void) { return 0; }
+#endif
+
+#endif

arch/arm/mach-ux500/setup.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2009 ST-Ericsson.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * These symbols are needed for board-specific files to call their
+ * own cpu-specific files
+ */
+#ifndef __ASM_ARCH_SETUP_H
+#define __ASM_ARCH_SETUP_H
+
+extern void ux500_cpu_die(unsigned int cpu);
+
+#endif /*  __ASM_ARCH_SETUP_H */

arch/arm/mach-ux500/ste-dma40-db8500.h

@@ -0,0 +1,85 @@
+/*
+ * arch/arm/mach-ux500/ste_dma40_db8500.h
+ * DB8500-SoC-specific configuration for DMA40
+ *
+ * Copyright (C) ST-Ericsson 2007-2010
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Per Friden <per.friden@stericsson.com>
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
+ */
+#ifndef STE_DMA40_DB8500_H
+#define STE_DMA40_DB8500_H
+
+#define DB8500_DMA_NR_DEV 64
+
+/*
+ * Unless otherwise specified, all channels numbers are used for
+ * TX & RX, and can be used for either source or destination
+ * channels.
+ */
+enum dma_dev_type {
+	DB8500_DMA_DEV0_SPI0 = 0,
+	DB8500_DMA_DEV1_SD_MMC0 = 1,
+	DB8500_DMA_DEV2_SD_MMC1 = 2,
+	DB8500_DMA_DEV3_SD_MMC2 = 3,
+	DB8500_DMA_DEV4_I2C1 = 4,
+	DB8500_DMA_DEV5_I2C3 = 5,
+	DB8500_DMA_DEV6_I2C2 = 6,
+	DB8500_DMA_DEV7_I2C4 = 7,			/* Only on V1 and later */
+	DB8500_DMA_DEV8_SSP0 = 8,
+	DB8500_DMA_DEV9_SSP1 = 9,
+	DB8500_DMA_DEV10_MCDE_RX = 10,			/* RX only */
+	DB8500_DMA_DEV11_UART2 = 11,
+	DB8500_DMA_DEV12_UART1 = 12,
+	DB8500_DMA_DEV13_UART0 = 13,
+	DB8500_DMA_DEV14_MSP2 = 14,
+	DB8500_DMA_DEV15_I2C0 = 15,
+	DB8500_DMA_DEV16_USB_OTG_IEP_AND_OEP_7_15 = 16,
+	DB8500_DMA_DEV17_USB_OTG_IEP_AND_OEP_6_14 = 17,
+	DB8500_DMA_DEV18_USB_OTG_IEP_AND_OEP_5_13 = 18,
+	DB8500_DMA_DEV19_USB_OTG_IEP_AND_OEP_4_12 = 19,
+	DB8500_DMA_DEV20_SLIM0_CH0_HSI_CH0 = 20,
+	DB8500_DMA_DEV21_SLIM0_CH1_HSI_CH1 = 21,
+	DB8500_DMA_DEV22_SLIM0_CH2_HSI_CH2 = 22,
+	DB8500_DMA_DEV23_SLIM0_CH3_HSI_CH3 = 23,
+	DB8500_DMA_DEV24_SXA0 = 24,
+	DB8500_DMA_DEV25_SXA1 = 25,
+	DB8500_DMA_DEV26_SXA2 = 26,
+	DB8500_DMA_DEV27_SXA3 = 27,
+	DB8500_DMA_DEV28_SD_MM2 = 28,
+	DB8500_DMA_DEV29_SD_MM0 = 29,
+	DB8500_DMA_DEV30_MSP1 = 30,
+	/* On DB8500v2, MSP3 RX replaces MSP1 RX */
+	DB8500_DMA_DEV30_MSP3 = 30,
+	DB8500_DMA_DEV31_MSP0_SLIM0_CH0 = 31,
+	DB8500_DMA_DEV32_SD_MM1 = 32,
+	DB8500_DMA_DEV33_SPI2 = 33,
+	DB8500_DMA_DEV34_I2C3_RX2_TX2 = 34,
+	DB8500_DMA_DEV35_SPI1 = 35,
+	DB8500_DMA_DEV36_USB_OTG_IEP_AND_OEP_3_11 = 36,
+	DB8500_DMA_DEV37_USB_OTG_IEP_AND_OEP_2_10 = 37,
+	DB8500_DMA_DEV38_USB_OTG_IEP_AND_OEP_1_9 = 38,
+	DB8500_DMA_DEV39_USB_OTG_IEP_AND_OEP_8 = 39,
+	DB8500_DMA_DEV40_SPI3 = 40,
+	DB8500_DMA_DEV41_SD_MM3 = 41,
+	DB8500_DMA_DEV42_SD_MM4 = 42,
+	DB8500_DMA_DEV43_SD_MM5 = 43,
+	DB8500_DMA_DEV44_SXA4 = 44,
+	DB8500_DMA_DEV45_SXA5 = 45,
+	DB8500_DMA_DEV46_SLIM0_CH8_SRC_SXA6 = 46,
+	DB8500_DMA_DEV47_SLIM0_CH9_SRC_SXA7 = 47,
+	DB8500_DMA_DEV48_CAC1 = 48,
+	DB8500_DMA_DEV49_CAC1_TX_HAC1_TX = 49,		/* TX only */
+	DB8500_DMA_DEV50_HAC1_TX = 50,			/* TX only */
+	DB8500_DMA_MEMCPY_TX_0 = 51,			/* TX only */
+	DB8500_DMA_DEV52_SLIM0_CH4_HSI_CH4 = 52,
+	DB8500_DMA_DEV53_SLIM0_CH5_HSI_CH5 = 53,
+	DB8500_DMA_DEV54_SLIM0_CH6_HSI_CH6 = 54,
+	DB8500_DMA_DEV55_SLIM0_CH7_HSI_CH7 = 55,
+	/* 56 -> 60 are channels reserved for memcpy only */
+	DB8500_DMA_DEV61_CAC0 = 61,
+	DB8500_DMA_DEV62_CAC0_TX_HAC0_TX = 62,		/* TX only */
+	DB8500_DMA_DEV63_HAC0_TX = 63,			/* TX only */
+};
+
+#endif

arch/arm/mach-versatile/Kconfig

@@ -0,0 +1,18 @@
+config ARCH_VERSATILE
+	bool "ARM Ltd. Versatile family"
+	depends on ARCH_MULTI_V5
+	select ARM_AMBA
+	select ARM_TIMER_SP804
+	select ARM_VIC
+	select CLKSRC_VERSATILE
+	select COMMON_CLK_VERSATILE
+	select CPU_ARM926T
+	select ICST
+	select MFD_SYSCON
+	select PLAT_VERSATILE
+	select POWER_RESET
+	select POWER_RESET_VERSATILE
+	select VERSATILE_FPGA_IRQ
+	help
+	  This enables support for ARM Ltd Versatile board.
+

arch/arm/mach-versatile/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y					:= versatile_dt.o

arch/arm/mach-versatile/versatile_dt.c

@@ -0,0 +1,361 @@
+/*
+ * Versatile board support using the device tree
+ *
+ *  Copyright (C) 2010 Secret Lab Technologies Ltd.
+ *  Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com>
+ *  Copyright (C) 2004 ARM Limited
+ *  Copyright (C) 2000 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/clcd.h>
+#include <linux/platform_data/video-clcd-versatile.h>
+#include <linux/amba/mmci.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+/* macro to get at MMIO space when running virtually */
+#define IO_ADDRESS(x)		(((x) & 0x0fffffff) + (((x) >> 4) & 0x0f000000) + 0xf0000000)
+#define __io_address(n)		((void __iomem __force *)IO_ADDRESS(n))
+
+/*
+ * ------------------------------------------------------------------------
+ *  Versatile Registers
+ * ------------------------------------------------------------------------
+ */
+#define VERSATILE_SYS_PCICTL_OFFSET           0x44
+#define VERSATILE_SYS_MCI_OFFSET              0x48
+#define VERSATILE_SYS_CLCD_OFFSET             0x50
+
+/*
+ * VERSATILE peripheral addresses
+ */
+#define VERSATILE_MMCI0_BASE           0x10005000	/* MMC interface */
+#define VERSATILE_MMCI1_BASE           0x1000B000	/* MMC Interface */
+#define VERSATILE_CLCD_BASE            0x10120000	/* CLCD */
+#define VERSATILE_SCTL_BASE            0x101E0000	/* System controller */
+#define VERSATILE_IB2_BASE             0x24000000	/* IB2 module */
+#define VERSATILE_IB2_CTL_BASE		(VERSATILE_IB2_BASE + 0x03000000)
+
+/*
+ * System controller bit assignment
+ */
+#define VERSATILE_REFCLK	0
+#define VERSATILE_TIMCLK	1
+
+#define VERSATILE_TIMER1_EnSel	15
+#define VERSATILE_TIMER2_EnSel	17
+#define VERSATILE_TIMER3_EnSel	19
+#define VERSATILE_TIMER4_EnSel	21
+
+static void __iomem *versatile_sys_base;
+static void __iomem *versatile_ib2_ctrl;
+
+unsigned int mmc_status(struct device *dev)
+{
+	struct amba_device *adev = container_of(dev, struct amba_device, dev);
+	u32 mask;
+
+	if (adev->res.start == VERSATILE_MMCI0_BASE)
+		mask = 1;
+	else
+		mask = 2;
+
+	return readl(versatile_sys_base + VERSATILE_SYS_MCI_OFFSET) & mask;
+}
+
+static struct mmci_platform_data mmc0_plat_data = {
+	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
+	.status		= mmc_status,
+	.gpio_wp	= -1,
+	.gpio_cd	= -1,
+};
+
+static struct mmci_platform_data mmc1_plat_data = {
+	.ocr_mask	= MMC_VDD_32_33|MMC_VDD_33_34,
+	.status		= mmc_status,
+	.gpio_wp	= -1,
+	.gpio_cd	= -1,
+};
+
+/*
+ * CLCD support.
+ */
+#define SYS_CLCD_MODE_MASK	(3 << 0)
+#define SYS_CLCD_MODE_888	(0 << 0)
+#define SYS_CLCD_MODE_5551	(1 << 0)
+#define SYS_CLCD_MODE_565_RLSB	(2 << 0)
+#define SYS_CLCD_MODE_565_BLSB	(3 << 0)
+#define SYS_CLCD_NLCDIOON	(1 << 2)
+#define SYS_CLCD_VDDPOSSWITCH	(1 << 3)
+#define SYS_CLCD_PWR3V5SWITCH	(1 << 4)
+#define SYS_CLCD_ID_MASK	(0x1f << 8)
+#define SYS_CLCD_ID_SANYO_3_8	(0x00 << 8)
+#define SYS_CLCD_ID_UNKNOWN_8_4	(0x01 << 8)
+#define SYS_CLCD_ID_EPSON_2_2	(0x02 << 8)
+#define SYS_CLCD_ID_SANYO_2_5	(0x07 << 8)
+#define SYS_CLCD_ID_VGA		(0x1f << 8)
+
+static bool is_sanyo_2_5_lcd;
+
+/*
+ * Disable all display connectors on the interface module.
+ */
+static void versatile_clcd_disable(struct clcd_fb *fb)
+{
+	void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+	u32 val;
+
+	val = readl(sys_clcd);
+	val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
+	writel(val, sys_clcd);
+
+	/*
+	 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light off
+	 */
+	if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
+		unsigned long ctrl;
+
+		ctrl = readl(versatile_ib2_ctrl);
+		ctrl &= ~0x01;
+		writel(ctrl, versatile_ib2_ctrl);
+	}
+}
+
+/*
+ * Enable the relevant connector on the interface module.
+ */
+static void versatile_clcd_enable(struct clcd_fb *fb)
+{
+	struct fb_var_screeninfo *var = &fb->fb.var;
+	void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+	u32 val;
+
+	val = readl(sys_clcd);
+	val &= ~SYS_CLCD_MODE_MASK;
+
+	switch (var->green.length) {
+	case 5:
+		val |= SYS_CLCD_MODE_5551;
+		break;
+	case 6:
+		if (var->red.offset == 0)
+			val |= SYS_CLCD_MODE_565_RLSB;
+		else
+			val |= SYS_CLCD_MODE_565_BLSB;
+		break;
+	case 8:
+		val |= SYS_CLCD_MODE_888;
+		break;
+	}
+
+	/*
+	 * Set the MUX
+	 */
+	writel(val, sys_clcd);
+
+	/*
+	 * And now enable the PSUs
+	 */
+	val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
+	writel(val, sys_clcd);
+
+	/*
+	 * If the LCD is Sanyo 2x5 in on the IB2 board, turn the back-light on
+	 */
+	if (of_machine_is_compatible("arm,versatile-ab") && is_sanyo_2_5_lcd) {
+		unsigned long ctrl;
+
+		ctrl = readl(versatile_ib2_ctrl);
+		ctrl |= 0x01;
+		writel(ctrl, versatile_ib2_ctrl);
+	}
+}
+
+/*
+ * Detect which LCD panel is connected, and return the appropriate
+ * clcd_panel structure.  Note: we do not have any information on
+ * the required timings for the 8.4in panel, so we presently assume
+ * VGA timings.
+ */
+static int versatile_clcd_setup(struct clcd_fb *fb)
+{
+	void __iomem *sys_clcd = versatile_sys_base + VERSATILE_SYS_CLCD_OFFSET;
+	const char *panel_name;
+	u32 val;
+
+	is_sanyo_2_5_lcd = false;
+
+	val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
+	if (val == SYS_CLCD_ID_SANYO_3_8)
+		panel_name = "Sanyo TM38QV67A02A";
+	else if (val == SYS_CLCD_ID_SANYO_2_5) {
+		panel_name = "Sanyo QVGA Portrait";
+		is_sanyo_2_5_lcd = true;
+	} else if (val == SYS_CLCD_ID_EPSON_2_2)
+		panel_name = "Epson L2F50113T00";
+	else if (val == SYS_CLCD_ID_VGA)
+		panel_name = "VGA";
+	else {
+		printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
+			val);
+		panel_name = "VGA";
+	}
+
+	fb->panel = versatile_clcd_get_panel(panel_name);
+	if (!fb->panel)
+		return -EINVAL;
+
+	return versatile_clcd_setup_dma(fb, SZ_1M);
+}
+
+static void versatile_clcd_decode(struct clcd_fb *fb, struct clcd_regs *regs)
+{
+	clcdfb_decode(fb, regs);
+
+	/* Always clear BGR for RGB565: we do the routing externally */
+	if (fb->fb.var.green.length == 6)
+		regs->cntl &= ~CNTL_BGR;
+}
+
+static struct clcd_board clcd_plat_data = {
+	.name		= "Versatile",
+	.caps		= CLCD_CAP_5551 | CLCD_CAP_565 | CLCD_CAP_888,
+	.check		= clcdfb_check,
+	.decode		= versatile_clcd_decode,
+	.disable	= versatile_clcd_disable,
+	.enable		= versatile_clcd_enable,
+	.setup		= versatile_clcd_setup,
+	.mmap		= versatile_clcd_mmap_dma,
+	.remove		= versatile_clcd_remove_dma,
+};
+
+/*
+ * Lookup table for attaching a specific name and platform_data pointer to
+ * devices as they get created by of_platform_populate().  Ideally this table
+ * would not exist, but the current clock implementation depends on some devices
+ * having a specific name.
+ */
+struct of_dev_auxdata versatile_auxdata_lookup[] __initdata = {
+	OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI0_BASE, "fpga:05", &mmc0_plat_data),
+	OF_DEV_AUXDATA("arm,primecell", VERSATILE_MMCI1_BASE, "fpga:0b", &mmc1_plat_data),
+	OF_DEV_AUXDATA("arm,primecell", VERSATILE_CLCD_BASE, "dev:20", &clcd_plat_data),
+	{}
+};
+
+static struct map_desc versatile_io_desc[] __initdata __maybe_unused = {
+	{
+		.virtual	=  IO_ADDRESS(VERSATILE_SCTL_BASE),
+		.pfn		= __phys_to_pfn(VERSATILE_SCTL_BASE),
+		.length		= SZ_4K * 9,
+		.type		= MT_DEVICE
+	}
+};
+
+static void __init versatile_map_io(void)
+{
+	debug_ll_io_init();
+	iotable_init(versatile_io_desc, ARRAY_SIZE(versatile_io_desc));
+}
+
+static void __init versatile_init_early(void)
+{
+	u32 val;
+
+	/*
+	 * set clock frequency:
+	 *	VERSATILE_REFCLK is 32KHz
+	 *	VERSATILE_TIMCLK is 1MHz
+	 */
+	val = readl(__io_address(VERSATILE_SCTL_BASE));
+	writel((VERSATILE_TIMCLK << VERSATILE_TIMER1_EnSel) |
+	       (VERSATILE_TIMCLK << VERSATILE_TIMER2_EnSel) |
+	       (VERSATILE_TIMCLK << VERSATILE_TIMER3_EnSel) |
+	       (VERSATILE_TIMCLK << VERSATILE_TIMER4_EnSel) | val,
+	       __io_address(VERSATILE_SCTL_BASE));
+}
+
+static void __init versatile_dt_pci_init(void)
+{
+	u32 val;
+	struct device_node *np;
+	struct property *newprop;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci");
+	if (!np)
+		return;
+
+	/* Check if PCI backplane is detected */
+	val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
+	if (val & 1) {
+		/*
+		 * Enable PCI accesses. Note that the documentaton is
+		 * inconsistent whether or not this is needed, but the old
+		 * driver had it so we will keep it.
+		 */
+		writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
+		return;
+	}
+
+	newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
+	if (!newprop)
+		return;
+
+	newprop->name = kstrdup("status", GFP_KERNEL);
+	newprop->value = kstrdup("disabled", GFP_KERNEL);
+	newprop->length = sizeof("disabled");
+	of_update_property(np, newprop);
+
+	pr_info("Not plugged into PCI backplane!\n");
+}
+
+static void __init versatile_dt_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile");
+	if (np)
+		versatile_sys_base = of_iomap(np, 0);
+	WARN_ON(!versatile_sys_base);
+
+	versatile_ib2_ctrl = ioremap(VERSATILE_IB2_CTL_BASE, SZ_4K);
+
+	versatile_dt_pci_init();
+
+	of_platform_default_populate(NULL, versatile_auxdata_lookup, NULL);
+}
+
+static const char *const versatile_dt_match[] __initconst = {
+	"arm,versatile-ab",
+	"arm,versatile-pb",
+	NULL,
+};
+
+DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
+	.map_io		= versatile_map_io,
+	.init_early	= versatile_init_early,
+	.init_machine	= versatile_dt_init,
+	.dt_compat	= versatile_dt_match,
+MACHINE_END

arch/arm/mach-vexpress/Kconfig

@@ -0,0 +1,83 @@
+menuconfig ARCH_VEXPRESS
+	bool "ARM Ltd. Versatile Express family"
+	depends on ARCH_MULTI_V7
+	select ARCH_SUPPORTS_BIG_ENDIAN
+	select ARM_AMBA
+	select ARM_GIC
+	select ARM_GLOBAL_TIMER
+	select ARM_TIMER_SP804
+	select COMMON_CLK_VERSATILE
+	select GPIOLIB
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if SMP
+	select HAVE_PATA_PLATFORM
+	select ICST
+	select NO_IOPORT_MAP
+	select PLAT_VERSATILE
+	select POWER_RESET
+	select POWER_RESET_VEXPRESS
+	select POWER_SUPPLY
+	select REGULATOR if MMC_ARMMMCI
+	select REGULATOR_FIXED_VOLTAGE if REGULATOR
+	select VEXPRESS_CONFIG
+	select VEXPRESS_SYSCFG
+	select MFD_VEXPRESS_SYSREG
+	help
+	  This option enables support for systems using Cortex processor based
+	  ARM core and logic (FPGA) tiles on the Versatile Express motherboard,
+	  for example:
+
+	  - CoreTile Express A5x2 (V2P-CA5s)
+	  - CoreTile Express A9x4 (V2P-CA9)
+	  - CoreTile Express A15x2 (V2P-CA15)
+	  - LogicTile Express 13MG (V2F-2XV6) with A5, A7, A9 or A15 SMMs
+	    (Soft Macrocell Models)
+	  - Versatile Express RTSMs (Models)
+
+	  You must boot using a Flattened Device Tree in order to use these
+	  platforms. The traditional (ATAGs) boot method is not usable on
+	  these boards with this option.
+
+if ARCH_VEXPRESS
+
+config ARCH_VEXPRESS_CORTEX_A5_A9_ERRATA
+	bool "Enable A5 and A9 only errata work-arounds"
+	default y
+	select ARM_ERRATA_643719 if SMP
+	select ARM_ERRATA_720789
+	select PL310_ERRATA_753970 if CACHE_L2X0
+	help
+	  Provides common dependencies for Versatile Express platforms
+	  based on Cortex-A5 and Cortex-A9 processors. In order to
+	  build a working kernel, you must also enable relevant core
+	  tile support or Flattened Device Tree based support options.
+
+config ARCH_VEXPRESS_DCSCB
+	bool "Dual Cluster System Control Block (DCSCB) support"
+	depends on MCPM
+	select ARM_CCI400_PORT_CTRL
+	help
+	  Support for the Dual Cluster System Configuration Block (DCSCB).
+	  This is needed to provide CPU and cluster power management
+	  on RTSM implementing big.LITTLE.
+
+config ARCH_VEXPRESS_SPC
+	bool "Versatile Express Serial Power Controller (SPC)"
+	select PM_OPP
+	help
+	  The TC2 (A15x2 A7x3) versatile express core tile integrates a logic
+	  block called Serial Power Controller (SPC) that provides the interface
+	  between the dual cluster test-chip and the M3 microcontroller that
+	  carries out power management.
+
+config ARCH_VEXPRESS_TC2_PM
+	bool "Versatile Express TC2 power management"
+	depends on MCPM
+	select ARM_CCI400_PORT_CTRL
+	select ARCH_VEXPRESS_SPC
+	select ARM_CPU_SUSPEND
+	help
+	  Support for CPU and cluster power management on Versatile Express
+	  with a TC2 (A15x2 A7x3) big.LITTLE core tile.
+
+endif

arch/arm/mach-vexpress/Makefile

@@ -0,0 +1,19 @@
+#
+# Makefile for the linux kernel.
+#
+ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := \
+	-I$(srctree)/arch/arm/plat-versatile/include
+
+obj-$(CONFIG_ARCH_VEXPRESS)		:= v2m.o
+obj-$(CONFIG_ARCH_VEXPRESS_DCSCB)	+= dcscb.o	dcscb_setup.o
+CFLAGS_dcscb.o				+= -march=armv7-a
+CFLAGS_REMOVE_dcscb.o			= -pg
+obj-$(CONFIG_ARCH_VEXPRESS_SPC)		+= spc.o
+CFLAGS_REMOVE_spc.o			= -pg
+obj-$(CONFIG_ARCH_VEXPRESS_TC2_PM)	+= tc2_pm.o
+CFLAGS_tc2_pm.o				+= -march=armv7-a
+CFLAGS_REMOVE_tc2_pm.o			= -pg
+obj-$(CONFIG_SMP)			+= platsmp.o
+obj-$(CONFIG_HOTPLUG_CPU)		+= hotplug.o
+
+obj-$(CONFIG_ARCH_MPS2)			+= v2m-mps2.o

arch/arm/mach-vexpress/Makefile.boot

@@ -0,0 +1,3 @@
+# Empty file waiting for deletion once Makefile.boot isn't needed any more.
+# Patch waits for application at
+# http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .

arch/arm/mach-vexpress/core.h

@@ -0,0 +1,5 @@
+bool vexpress_smp_init_ops(void);
+
+extern const struct smp_operations vexpress_smp_dt_ops;
+
+extern void vexpress_cpu_die(unsigned int cpu);

arch/arm/mach-vexpress/dcscb.c

@@ -0,0 +1,174 @@
+/*
+ * arch/arm/mach-vexpress/dcscb.c - Dual Cluster System Configuration Block
+ *
+ * Created by:	Nicolas Pitre, May 2012
+ * Copyright:	(C) 2012-2013  Linaro Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/of_address.h>
+#include <linux/vexpress.h>
+#include <linux/arm-cci.h>
+
+#include <asm/mcpm.h>
+#include <asm/proc-fns.h>
+#include <asm/cacheflush.h>
+#include <asm/cputype.h>
+#include <asm/cp15.h>
+
+
+#define RST_HOLD0	0x0
+#define RST_HOLD1	0x4
+#define SYS_SWRESET	0x8
+#define RST_STAT0	0xc
+#define RST_STAT1	0x10
+#define EAG_CFG_R	0x20
+#define EAG_CFG_W	0x24
+#define KFC_CFG_R	0x28
+#define KFC_CFG_W	0x2c
+#define DCS_CFG_R	0x30
+
+static void __iomem *dcscb_base;
+static int dcscb_allcpus_mask[2];
+
+static int dcscb_cpu_powerup(unsigned int cpu, unsigned int cluster)
+{
+	unsigned int rst_hold, cpumask = (1 << cpu);
+
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	if (cluster >= 2 || !(cpumask & dcscb_allcpus_mask[cluster]))
+		return -EINVAL;
+
+	rst_hold = readl_relaxed(dcscb_base + RST_HOLD0 + cluster * 4);
+	rst_hold &= ~(cpumask | (cpumask << 4));
+	writel_relaxed(rst_hold, dcscb_base + RST_HOLD0 + cluster * 4);
+	return 0;
+}
+
+static int dcscb_cluster_powerup(unsigned int cluster)
+{
+	unsigned int rst_hold;
+
+	pr_debug("%s: cluster %u\n", __func__, cluster);
+	if (cluster >= 2)
+		return -EINVAL;
+
+	/* remove cluster reset and add individual CPU's reset */
+	rst_hold = readl_relaxed(dcscb_base + RST_HOLD0 + cluster * 4);
+	rst_hold &= ~(1 << 8);
+	rst_hold |= dcscb_allcpus_mask[cluster];
+	writel_relaxed(rst_hold, dcscb_base + RST_HOLD0 + cluster * 4);
+	return 0;
+}
+
+static void dcscb_cpu_powerdown_prepare(unsigned int cpu, unsigned int cluster)
+{
+	unsigned int rst_hold;
+
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	BUG_ON(cluster >= 2 || !((1 << cpu) & dcscb_allcpus_mask[cluster]));
+
+	rst_hold = readl_relaxed(dcscb_base + RST_HOLD0 + cluster * 4);
+	rst_hold |= (1 << cpu);
+	writel_relaxed(rst_hold, dcscb_base + RST_HOLD0 + cluster * 4);
+}
+
+static void dcscb_cluster_powerdown_prepare(unsigned int cluster)
+{
+	unsigned int rst_hold;
+
+	pr_debug("%s: cluster %u\n", __func__, cluster);
+	BUG_ON(cluster >= 2);
+
+	rst_hold = readl_relaxed(dcscb_base + RST_HOLD0 + cluster * 4);
+	rst_hold |= (1 << 8);
+	writel_relaxed(rst_hold, dcscb_base + RST_HOLD0 + cluster * 4);
+}
+
+static void dcscb_cpu_cache_disable(void)
+{
+	/* Disable and flush the local CPU cache. */
+	v7_exit_coherency_flush(louis);
+}
+
+static void dcscb_cluster_cache_disable(void)
+{
+	/* Flush all cache levels for this cluster. */
+	v7_exit_coherency_flush(all);
+
+	/*
+	 * A full outer cache flush could be needed at this point
+	 * on platforms with such a cache, depending on where the
+	 * outer cache sits. In some cases the notion of a "last
+	 * cluster standing" would need to be implemented if the
+	 * outer cache is shared across clusters. In any case, when
+	 * the outer cache needs flushing, there is no concurrent
+	 * access to the cache controller to worry about and no
+	 * special locking besides what is already provided by the
+	 * MCPM state machinery is needed.
+	 */
+
+	/*
+	 * Disable cluster-level coherency by masking
+	 * incoming snoops and DVM messages:
+	 */
+	cci_disable_port_by_cpu(read_cpuid_mpidr());
+}
+
+static const struct mcpm_platform_ops dcscb_power_ops = {
+	.cpu_powerup		= dcscb_cpu_powerup,
+	.cluster_powerup	= dcscb_cluster_powerup,
+	.cpu_powerdown_prepare	= dcscb_cpu_powerdown_prepare,
+	.cluster_powerdown_prepare = dcscb_cluster_powerdown_prepare,
+	.cpu_cache_disable	= dcscb_cpu_cache_disable,
+	.cluster_cache_disable	= dcscb_cluster_cache_disable,
+};
+
+extern void dcscb_power_up_setup(unsigned int affinity_level);
+
+static int __init dcscb_init(void)
+{
+	struct device_node *node;
+	unsigned int cfg;
+	int ret;
+
+	if (!cci_probed())
+		return -ENODEV;
+
+	node = of_find_compatible_node(NULL, NULL, "arm,rtsm,dcscb");
+	if (!node)
+		return -ENODEV;
+	dcscb_base = of_iomap(node, 0);
+	if (!dcscb_base)
+		return -EADDRNOTAVAIL;
+	cfg = readl_relaxed(dcscb_base + DCS_CFG_R);
+	dcscb_allcpus_mask[0] = (1 << (((cfg >> 16) >> (0 << 2)) & 0xf)) - 1;
+	dcscb_allcpus_mask[1] = (1 << (((cfg >> 16) >> (1 << 2)) & 0xf)) - 1;
+
+	ret = mcpm_platform_register(&dcscb_power_ops);
+	if (!ret)
+		ret = mcpm_sync_init(dcscb_power_up_setup);
+	if (ret) {
+		iounmap(dcscb_base);
+		return ret;
+	}
+
+	pr_info("VExpress DCSCB support installed\n");
+
+	/*
+	 * Future entries into the kernel can now go
+	 * through the cluster entry vectors.
+	 */
+	vexpress_flags_set(virt_to_phys(mcpm_entry_point));
+
+	return 0;
+}
+
+early_initcall(dcscb_init);

arch/arm/mach-vexpress/dcscb_setup.S

@@ -0,0 +1,38 @@
+/*
+ * arch/arm/include/asm/dcscb_setup.S
+ *
+ * Created by:  Dave Martin, 2012-06-22
+ * Copyright:   (C) 2012-2013  Linaro Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+
+ENTRY(dcscb_power_up_setup)
+
+	cmp	r0, #0			@ check affinity level
+	beq	2f
+
+/*
+ * Enable cluster-level coherency, in preparation for turning on the MMU.
+ * The ACTLR SMP bit does not need to be set here, because cpu_resume()
+ * already restores that.
+ *
+ * A15/A7 may not require explicit L2 invalidation on reset, dependent
+ * on hardware integration decisions.
+ * For now, this code assumes that L2 is either already invalidated,
+ * or invalidation is not required.
+ */
+
+	b	cci_enable_port_for_self
+
+2:	@ Implementation-specific local CPU setup operations should go here,
+	@ if any.  In this case, there is nothing to do.
+
+	bx	lr
+
+ENDPROC(dcscb_power_up_setup)

arch/arm/mach-vexpress/hotplug.c

@@ -0,0 +1,108 @@
+/*
+ *  linux/arch/arm/mach-realview/hotplug.c
+ *
+ *  Copyright (C) 2002 ARM Ltd.
+ *  All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+
+#include <asm/smp_plat.h>
+#include <asm/cp15.h>
+
+#include "core.h"
+
+static inline void cpu_enter_lowpower(void)
+{
+	unsigned int v;
+
+	asm volatile(
+		"mcr	p15, 0, %1, c7, c5, 0\n"
+	"	mcr	p15, 0, %1, c7, c10, 4\n"
+	/*
+	 * Turn off coherency
+	 */
+	"	mrc	p15, 0, %0, c1, c0, 1\n"
+	"	bic	%0, %0, %3\n"
+	"	mcr	p15, 0, %0, c1, c0, 1\n"
+	"	mrc	p15, 0, %0, c1, c0, 0\n"
+	"	bic	%0, %0, %2\n"
+	"	mcr	p15, 0, %0, c1, c0, 0\n"
+	  : "=&r" (v)
+	  : "r" (0), "Ir" (CR_C), "Ir" (0x40)
+	  : "cc");
+}
+
+static inline void cpu_leave_lowpower(void)
+{
+	unsigned int v;
+
+	asm volatile(
+		"mrc	p15, 0, %0, c1, c0, 0\n"
+	"	orr	%0, %0, %1\n"
+	"	mcr	p15, 0, %0, c1, c0, 0\n"
+	"	mrc	p15, 0, %0, c1, c0, 1\n"
+	"	orr	%0, %0, %2\n"
+	"	mcr	p15, 0, %0, c1, c0, 1\n"
+	  : "=&r" (v)
+	  : "Ir" (CR_C), "Ir" (0x40)
+	  : "cc");
+}
+
+static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
+{
+	/*
+	 * there is no power-control hardware on this platform, so all
+	 * we can do is put the core into WFI; this is safe as the calling
+	 * code will have already disabled interrupts
+	 */
+	for (;;) {
+		wfi();
+
+		if (pen_release == cpu_logical_map(cpu)) {
+			/*
+			 * OK, proper wakeup, we're done
+			 */
+			break;
+		}
+
+		/*
+		 * Getting here, means that we have come out of WFI without
+		 * having been woken up - this shouldn't happen
+		 *
+		 * Just note it happening - when we're woken, we can report
+		 * its occurrence.
+		 */
+		(*spurious)++;
+	}
+}
+
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ * Called with IRQs disabled
+ */
+void vexpress_cpu_die(unsigned int cpu)
+{
+	int spurious = 0;
+
+	/*
+	 * we're ready for shutdown now, so do it
+	 */
+	cpu_enter_lowpower();
+	platform_do_lowpower(cpu, &spurious);
+
+	/*
+	 * bring this CPU back into the world of cache
+	 * coherency, and then restore interrupts
+	 */
+	cpu_leave_lowpower();
+
+	if (spurious)
+		pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
+}

arch/arm/mach-vexpress/platsmp.c

@@ -0,0 +1,74 @@
+/*
+ *  linux/arch/arm/mach-vexpress/platsmp.c
+ *
+ *  Copyright (C) 2002 ARM Ltd.
+ *  All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/vexpress.h>
+
+#include <asm/mcpm.h>
+#include <asm/smp_scu.h>
+#include <asm/mach/map.h>
+
+#include <plat/platsmp.h>
+
+#include "core.h"
+
+bool __init vexpress_smp_init_ops(void)
+{
+#ifdef CONFIG_MCPM
+	/*
+	 * The best way to detect a multi-cluster configuration at the moment
+	 * is to look for the presence of a CCI in the system.
+	 * Override the default vexpress_smp_ops if so.
+	 */
+	struct device_node *node;
+	node = of_find_compatible_node(NULL, NULL, "arm,cci-400");
+	if (node && of_device_is_available(node)) {
+		mcpm_smp_set_ops();
+		return true;
+	}
+#endif
+	return false;
+}
+
+static const struct of_device_id vexpress_smp_dt_scu_match[] __initconst = {
+	{ .compatible = "arm,cortex-a5-scu", },
+	{ .compatible = "arm,cortex-a9-scu", },
+	{}
+};
+
+static void __init vexpress_smp_dt_prepare_cpus(unsigned int max_cpus)
+{
+	struct device_node *scu = of_find_matching_node(NULL,
+			vexpress_smp_dt_scu_match);
+
+	if (scu)
+		scu_enable(of_iomap(scu, 0));
+
+	/*
+	 * Write the address of secondary startup into the
+	 * system-wide flags register. The boot monitor waits
+	 * until it receives a soft interrupt, and then the
+	 * secondary CPU branches to this address.
+	 */
+	vexpress_flags_set(virt_to_phys(versatile_secondary_startup));
+}
+
+const struct smp_operations vexpress_smp_dt_ops __initconst = {
+	.smp_prepare_cpus	= vexpress_smp_dt_prepare_cpus,
+	.smp_secondary_init	= versatile_secondary_init,
+	.smp_boot_secondary	= versatile_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= vexpress_cpu_die,
+#endif
+};

arch/arm/mach-vexpress/spc.c

@@ -0,0 +1,592 @@
+/*
+ * Versatile Express Serial Power Controller (SPC) support
+ *
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * Authors: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
+ *          Achin Gupta           <achin.gupta@arm.com>
+ *          Lorenzo Pieralisi     <lorenzo.pieralisi@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/cpu.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/pm_opp.h>
+#include <linux/slab.h>
+#include <linux/semaphore.h>
+
+#include <asm/cacheflush.h>
+
+#include "spc.h"
+
+#define SPCLOG "vexpress-spc: "
+
+#define PERF_LVL_A15		0x00
+#define PERF_REQ_A15		0x04
+#define PERF_LVL_A7		0x08
+#define PERF_REQ_A7		0x0c
+#define COMMS			0x10
+#define COMMS_REQ		0x14
+#define PWC_STATUS		0x18
+#define PWC_FLAG		0x1c
+
+/* SPC wake-up IRQs status and mask */
+#define WAKE_INT_MASK		0x24
+#define WAKE_INT_RAW		0x28
+#define WAKE_INT_STAT		0x2c
+/* SPC power down registers */
+#define A15_PWRDN_EN		0x30
+#define A7_PWRDN_EN		0x34
+/* SPC per-CPU mailboxes */
+#define A15_BX_ADDR0		0x68
+#define A7_BX_ADDR0		0x78
+
+/* SPC CPU/cluster reset statue */
+#define STANDBYWFI_STAT		0x3c
+#define STANDBYWFI_STAT_A15_CPU_MASK(cpu)	(1 << (cpu))
+#define STANDBYWFI_STAT_A7_CPU_MASK(cpu)	(1 << (3 + (cpu)))
+
+/* SPC system config interface registers */
+#define SYSCFG_WDATA		0x70
+#define SYSCFG_RDATA		0x74
+
+/* A15/A7 OPP virtual register base */
+#define A15_PERFVAL_BASE	0xC10
+#define A7_PERFVAL_BASE		0xC30
+
+/* Config interface control bits */
+#define SYSCFG_START		(1 << 31)
+#define SYSCFG_SCC		(6 << 20)
+#define SYSCFG_STAT		(14 << 20)
+
+/* wake-up interrupt masks */
+#define GBL_WAKEUP_INT_MSK	(0x3 << 10)
+
+/* TC2 static dual-cluster configuration */
+#define MAX_CLUSTERS		2
+
+/*
+ * Even though the SPC takes max 3-5 ms to complete any OPP/COMMS
+ * operation, the operation could start just before jiffie is about
+ * to be incremented. So setting timeout value of 20ms = 2jiffies@100Hz
+ */
+#define TIMEOUT_US	20000
+
+#define MAX_OPPS	8
+#define CA15_DVFS	0
+#define CA7_DVFS	1
+#define SPC_SYS_CFG	2
+#define STAT_COMPLETE(type)	((1 << 0) << (type << 2))
+#define STAT_ERR(type)		((1 << 1) << (type << 2))
+#define RESPONSE_MASK(type)	(STAT_COMPLETE(type) | STAT_ERR(type))
+
+struct ve_spc_opp {
+	unsigned long freq;
+	unsigned long u_volt;
+};
+
+struct ve_spc_drvdata {
+	void __iomem *baseaddr;
+	/*
+	 * A15s cluster identifier
+	 * It corresponds to A15 processors MPIDR[15:8] bitfield
+	 */
+	u32 a15_clusid;
+	uint32_t cur_rsp_mask;
+	uint32_t cur_rsp_stat;
+	struct semaphore sem;
+	struct completion done;
+	struct ve_spc_opp *opps[MAX_CLUSTERS];
+	int num_opps[MAX_CLUSTERS];
+};
+
+static struct ve_spc_drvdata *info;
+
+static inline bool cluster_is_a15(u32 cluster)
+{
+	return cluster == info->a15_clusid;
+}
+
+/**
+ * ve_spc_global_wakeup_irq()
+ *
+ * Function to set/clear global wakeup IRQs. Not protected by locking since
+ * it might be used in code paths where normal cacheable locks are not
+ * working. Locking must be provided by the caller to ensure atomicity.
+ *
+ * @set: if true, global wake-up IRQs are set, if false they are cleared
+ */
+void ve_spc_global_wakeup_irq(bool set)
+{
+	u32 reg;
+
+	reg = readl_relaxed(info->baseaddr + WAKE_INT_MASK);
+
+	if (set)
+		reg |= GBL_WAKEUP_INT_MSK;
+	else
+		reg &= ~GBL_WAKEUP_INT_MSK;
+
+	writel_relaxed(reg, info->baseaddr + WAKE_INT_MASK);
+}
+
+/**
+ * ve_spc_cpu_wakeup_irq()
+ *
+ * Function to set/clear per-CPU wake-up IRQs. Not protected by locking since
+ * it might be used in code paths where normal cacheable locks are not
+ * working. Locking must be provided by the caller to ensure atomicity.
+ *
+ * @cluster: mpidr[15:8] bitfield describing cluster affinity level
+ * @cpu: mpidr[7:0] bitfield describing cpu affinity level
+ * @set: if true, wake-up IRQs are set, if false they are cleared
+ */
+void ve_spc_cpu_wakeup_irq(u32 cluster, u32 cpu, bool set)
+{
+	u32 mask, reg;
+
+	if (cluster >= MAX_CLUSTERS)
+		return;
+
+	mask = 1 << cpu;
+
+	if (!cluster_is_a15(cluster))
+		mask <<= 4;
+
+	reg = readl_relaxed(info->baseaddr + WAKE_INT_MASK);
+
+	if (set)
+		reg |= mask;
+	else
+		reg &= ~mask;
+
+	writel_relaxed(reg, info->baseaddr + WAKE_INT_MASK);
+}
+
+/**
+ * ve_spc_set_resume_addr() - set the jump address used for warm boot
+ *
+ * @cluster: mpidr[15:8] bitfield describing cluster affinity level
+ * @cpu: mpidr[7:0] bitfield describing cpu affinity level
+ * @addr: physical resume address
+ */
+void ve_spc_set_resume_addr(u32 cluster, u32 cpu, u32 addr)
+{
+	void __iomem *baseaddr;
+
+	if (cluster >= MAX_CLUSTERS)
+		return;
+
+	if (cluster_is_a15(cluster))
+		baseaddr = info->baseaddr + A15_BX_ADDR0 + (cpu << 2);
+	else
+		baseaddr = info->baseaddr + A7_BX_ADDR0 + (cpu << 2);
+
+	writel_relaxed(addr, baseaddr);
+}
+
+/**
+ * ve_spc_powerdown()
+ *
+ * Function to enable/disable cluster powerdown. Not protected by locking
+ * since it might be used in code paths where normal cacheable locks are not
+ * working. Locking must be provided by the caller to ensure atomicity.
+ *
+ * @cluster: mpidr[15:8] bitfield describing cluster affinity level
+ * @enable: if true enables powerdown, if false disables it
+ */
+void ve_spc_powerdown(u32 cluster, bool enable)
+{
+	u32 pwdrn_reg;
+
+	if (cluster >= MAX_CLUSTERS)
+		return;
+
+	pwdrn_reg = cluster_is_a15(cluster) ? A15_PWRDN_EN : A7_PWRDN_EN;
+	writel_relaxed(enable, info->baseaddr + pwdrn_reg);
+}
+
+static u32 standbywfi_cpu_mask(u32 cpu, u32 cluster)
+{
+	return cluster_is_a15(cluster) ?
+		  STANDBYWFI_STAT_A15_CPU_MASK(cpu)
+		: STANDBYWFI_STAT_A7_CPU_MASK(cpu);
+}
+
+/**
+ * ve_spc_cpu_in_wfi(u32 cpu, u32 cluster)
+ *
+ * @cpu: mpidr[7:0] bitfield describing CPU affinity level within cluster
+ * @cluster: mpidr[15:8] bitfield describing cluster affinity level
+ *
+ * @return: non-zero if and only if the specified CPU is in WFI
+ *
+ * Take care when interpreting the result of this function: a CPU might
+ * be in WFI temporarily due to idle, and is not necessarily safely
+ * parked.
+ */
+int ve_spc_cpu_in_wfi(u32 cpu, u32 cluster)
+{
+	int ret;
+	u32 mask = standbywfi_cpu_mask(cpu, cluster);
+
+	if (cluster >= MAX_CLUSTERS)
+		return 1;
+
+	ret = readl_relaxed(info->baseaddr + STANDBYWFI_STAT);
+
+	pr_debug("%s: PCFGREG[0x%X] = 0x%08X, mask = 0x%X\n",
+		 __func__, STANDBYWFI_STAT, ret, mask);
+
+	return ret & mask;
+}
+
+static int ve_spc_get_performance(int cluster, u32 *freq)
+{
+	struct ve_spc_opp *opps = info->opps[cluster];
+	u32 perf_cfg_reg = 0;
+	u32 perf;
+
+	perf_cfg_reg = cluster_is_a15(cluster) ? PERF_LVL_A15 : PERF_LVL_A7;
+
+	perf = readl_relaxed(info->baseaddr + perf_cfg_reg);
+	if (perf >= info->num_opps[cluster])
+		return -EINVAL;
+
+	opps += perf;
+	*freq = opps->freq;
+
+	return 0;
+}
+
+/* find closest match to given frequency in OPP table */
+static int ve_spc_round_performance(int cluster, u32 freq)
+{
+	int idx, max_opp = info->num_opps[cluster];
+	struct ve_spc_opp *opps = info->opps[cluster];
+	u32 fmin = 0, fmax = ~0, ftmp;
+
+	freq /= 1000; /* OPP entries in kHz */
+	for (idx = 0; idx < max_opp; idx++, opps++) {
+		ftmp = opps->freq;
+		if (ftmp >= freq) {
+			if (ftmp <= fmax)
+				fmax = ftmp;
+		} else {
+			if (ftmp >= fmin)
+				fmin = ftmp;
+		}
+	}
+	if (fmax != ~0)
+		return fmax * 1000;
+	else
+		return fmin * 1000;
+}
+
+static int ve_spc_find_performance_index(int cluster, u32 freq)
+{
+	int idx, max_opp = info->num_opps[cluster];
+	struct ve_spc_opp *opps = info->opps[cluster];
+
+	for (idx = 0; idx < max_opp; idx++, opps++)
+		if (opps->freq == freq)
+			break;
+	return (idx == max_opp) ? -EINVAL : idx;
+}
+
+static int ve_spc_waitforcompletion(int req_type)
+{
+	int ret = wait_for_completion_interruptible_timeout(
+			&info->done, usecs_to_jiffies(TIMEOUT_US));
+	if (ret == 0)
+		ret = -ETIMEDOUT;
+	else if (ret > 0)
+		ret = info->cur_rsp_stat & STAT_COMPLETE(req_type) ? 0 : -EIO;
+	return ret;
+}
+
+static int ve_spc_set_performance(int cluster, u32 freq)
+{
+	u32 perf_cfg_reg;
+	int ret, perf, req_type;
+
+	if (cluster_is_a15(cluster)) {
+		req_type = CA15_DVFS;
+		perf_cfg_reg = PERF_LVL_A15;
+	} else {
+		req_type = CA7_DVFS;
+		perf_cfg_reg = PERF_LVL_A7;
+	}
+
+	perf = ve_spc_find_performance_index(cluster, freq);
+
+	if (perf < 0)
+		return perf;
+
+	if (down_timeout(&info->sem, usecs_to_jiffies(TIMEOUT_US)))
+		return -ETIME;
+
+	init_completion(&info->done);
+	info->cur_rsp_mask = RESPONSE_MASK(req_type);
+
+	writel(perf, info->baseaddr + perf_cfg_reg);
+	ret = ve_spc_waitforcompletion(req_type);
+
+	info->cur_rsp_mask = 0;
+	up(&info->sem);
+
+	return ret;
+}
+
+static int ve_spc_read_sys_cfg(int func, int offset, uint32_t *data)
+{
+	int ret;
+
+	if (down_timeout(&info->sem, usecs_to_jiffies(TIMEOUT_US)))
+		return -ETIME;
+
+	init_completion(&info->done);
+	info->cur_rsp_mask = RESPONSE_MASK(SPC_SYS_CFG);
+
+	/* Set the control value */
+	writel(SYSCFG_START | func | offset >> 2, info->baseaddr + COMMS);
+	ret = ve_spc_waitforcompletion(SPC_SYS_CFG);
+
+	if (ret == 0)
+		*data = readl(info->baseaddr + SYSCFG_RDATA);
+
+	info->cur_rsp_mask = 0;
+	up(&info->sem);
+
+	return ret;
+}
+
+static irqreturn_t ve_spc_irq_handler(int irq, void *data)
+{
+	struct ve_spc_drvdata *drv_data = data;
+	uint32_t status = readl_relaxed(drv_data->baseaddr + PWC_STATUS);
+
+	if (info->cur_rsp_mask & status) {
+		info->cur_rsp_stat = status;
+		complete(&drv_data->done);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*
+ *  +--------------------------+
+ *  | 31      20 | 19        0 |
+ *  +--------------------------+
+ *  |   m_volt   |  freq(kHz)  |
+ *  +--------------------------+
+ */
+#define MULT_FACTOR	20
+#define VOLT_SHIFT	20
+#define FREQ_MASK	(0xFFFFF)
+static int ve_spc_populate_opps(uint32_t cluster)
+{
+	uint32_t data = 0, off, ret, idx;
+	struct ve_spc_opp *opps;
+
+	opps = kzalloc(sizeof(*opps) * MAX_OPPS, GFP_KERNEL);
+	if (!opps)
+		return -ENOMEM;
+
+	info->opps[cluster] = opps;
+
+	off = cluster_is_a15(cluster) ? A15_PERFVAL_BASE : A7_PERFVAL_BASE;
+	for (idx = 0; idx < MAX_OPPS; idx++, off += 4, opps++) {
+		ret = ve_spc_read_sys_cfg(SYSCFG_SCC, off, &data);
+		if (!ret) {
+			opps->freq = (data & FREQ_MASK) * MULT_FACTOR;
+			opps->u_volt = (data >> VOLT_SHIFT) * 1000;
+		} else {
+			break;
+		}
+	}
+	info->num_opps[cluster] = idx;
+
+	return ret;
+}
+
+static int ve_init_opp_table(struct device *cpu_dev)
+{
+	int cluster;
+	int idx, ret = 0, max_opp;
+	struct ve_spc_opp *opps;
+
+	cluster = topology_physical_package_id(cpu_dev->id);
+	cluster = cluster < 0 ? 0 : cluster;
+
+	max_opp = info->num_opps[cluster];
+	opps = info->opps[cluster];
+
+	for (idx = 0; idx < max_opp; idx++, opps++) {
+		ret = dev_pm_opp_add(cpu_dev, opps->freq * 1000, opps->u_volt);
+		if (ret) {
+			dev_warn(cpu_dev, "failed to add opp %lu %lu\n",
+				 opps->freq, opps->u_volt);
+			return ret;
+		}
+	}
+	return ret;
+}
+
+int __init ve_spc_init(void __iomem *baseaddr, u32 a15_clusid, int irq)
+{
+	int ret;
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		pr_err(SPCLOG "unable to allocate mem\n");
+		return -ENOMEM;
+	}
+
+	info->baseaddr = baseaddr;
+	info->a15_clusid = a15_clusid;
+
+	if (irq <= 0) {
+		pr_err(SPCLOG "Invalid IRQ %d\n", irq);
+		kfree(info);
+		return -EINVAL;
+	}
+
+	init_completion(&info->done);
+
+	readl_relaxed(info->baseaddr + PWC_STATUS);
+
+	ret = request_irq(irq, ve_spc_irq_handler, IRQF_TRIGGER_HIGH
+				| IRQF_ONESHOT, "vexpress-spc", info);
+	if (ret) {
+		pr_err(SPCLOG "IRQ %d request failed\n", irq);
+		kfree(info);
+		return -ENODEV;
+	}
+
+	sema_init(&info->sem, 1);
+	/*
+	 * Multi-cluster systems may need this data when non-coherent, during
+	 * cluster power-up/power-down. Make sure driver info reaches main
+	 * memory.
+	 */
+	sync_cache_w(info);
+	sync_cache_w(&info);
+
+	return 0;
+}
+
+struct clk_spc {
+	struct clk_hw hw;
+	int cluster;
+};
+
+#define to_clk_spc(spc) container_of(spc, struct clk_spc, hw)
+static unsigned long spc_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct clk_spc *spc = to_clk_spc(hw);
+	u32 freq;
+
+	if (ve_spc_get_performance(spc->cluster, &freq))
+		return -EIO;
+
+	return freq * 1000;
+}
+
+static long spc_round_rate(struct clk_hw *hw, unsigned long drate,
+		unsigned long *parent_rate)
+{
+	struct clk_spc *spc = to_clk_spc(hw);
+
+	return ve_spc_round_performance(spc->cluster, drate);
+}
+
+static int spc_set_rate(struct clk_hw *hw, unsigned long rate,
+		unsigned long parent_rate)
+{
+	struct clk_spc *spc = to_clk_spc(hw);
+
+	return ve_spc_set_performance(spc->cluster, rate / 1000);
+}
+
+static struct clk_ops clk_spc_ops = {
+	.recalc_rate = spc_recalc_rate,
+	.round_rate = spc_round_rate,
+	.set_rate = spc_set_rate,
+};
+
+static struct clk *ve_spc_clk_register(struct device *cpu_dev)
+{
+	struct clk_init_data init;
+	struct clk_spc *spc;
+
+	spc = kzalloc(sizeof(*spc), GFP_KERNEL);
+	if (!spc) {
+		pr_err("could not allocate spc clk\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	spc->hw.init = &init;
+	spc->cluster = topology_physical_package_id(cpu_dev->id);
+
+	spc->cluster = spc->cluster < 0 ? 0 : spc->cluster;
+
+	init.name = dev_name(cpu_dev);
+	init.ops = &clk_spc_ops;
+	init.flags = CLK_GET_RATE_NOCACHE;
+	init.num_parents = 0;
+
+	return devm_clk_register(cpu_dev, &spc->hw);
+}
+
+static int __init ve_spc_clk_init(void)
+{
+	int cpu;
+	struct clk *clk;
+
+	if (!info)
+		return 0; /* Continue only if SPC is initialised */
+
+	if (ve_spc_populate_opps(0) || ve_spc_populate_opps(1)) {
+		pr_err("failed to build OPP table\n");
+		return -ENODEV;
+	}
+
+	for_each_possible_cpu(cpu) {
+		struct device *cpu_dev = get_cpu_device(cpu);
+		if (!cpu_dev) {
+			pr_warn("failed to get cpu%d device\n", cpu);
+			continue;
+		}
+		clk = ve_spc_clk_register(cpu_dev);
+		if (IS_ERR(clk)) {
+			pr_warn("failed to register cpu%d clock\n", cpu);
+			continue;
+		}
+		if (clk_register_clkdev(clk, NULL, dev_name(cpu_dev))) {
+			pr_warn("failed to register cpu%d clock lookup\n", cpu);
+			continue;
+		}
+
+		if (ve_init_opp_table(cpu_dev))
+			pr_warn("failed to initialise cpu%d opp table\n", cpu);
+	}
+
+	platform_device_register_simple("vexpress-spc-cpufreq", -1, NULL, 0);
+	return 0;
+}
+device_initcall(ve_spc_clk_init);

arch/arm/mach-vexpress/spc.h

@@ -0,0 +1,25 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) 2012 ARM Limited
+ */
+
+
+#ifndef __SPC_H_
+#define __SPC_H_
+
+int __init ve_spc_init(void __iomem *base, u32 a15_clusid, int irq);
+void ve_spc_global_wakeup_irq(bool set);
+void ve_spc_cpu_wakeup_irq(u32 cluster, u32 cpu, bool set);
+void ve_spc_set_resume_addr(u32 cluster, u32 cpu, u32 addr);
+void ve_spc_powerdown(u32 cluster, bool enable);
+int ve_spc_cpu_in_wfi(u32 cpu, u32 cluster);
+
+#endif

arch/arm/mach-vexpress/tc2_pm.c

@@ -0,0 +1,266 @@
+/*
+ * arch/arm/mach-vexpress/tc2_pm.c - TC2 power management support
+ *
+ * Created by:	Nicolas Pitre, October 2012
+ * Copyright:	(C) 2012-2013  Linaro Limited
+ *
+ * Some portions of this file were originally written by Achin Gupta
+ * Copyright:   (C) 2012  ARM Limited
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/errno.h>
+#include <linux/irqchip/arm-gic.h>
+
+#include <asm/mcpm.h>
+#include <asm/proc-fns.h>
+#include <asm/cacheflush.h>
+#include <asm/cputype.h>
+#include <asm/cp15.h>
+
+#include <linux/arm-cci.h>
+
+#include "spc.h"
+
+/* SCC conf registers */
+#define RESET_CTRL		0x018
+#define RESET_A15_NCORERESET(cpu)	(1 << (2 + (cpu)))
+#define RESET_A7_NCORERESET(cpu)	(1 << (16 + (cpu)))
+
+#define A15_CONF		0x400
+#define A7_CONF			0x500
+#define SYS_INFO		0x700
+#define SPC_BASE		0xb00
+
+static void __iomem *scc;
+
+#define TC2_CLUSTERS			2
+#define TC2_MAX_CPUS_PER_CLUSTER	3
+
+static unsigned int tc2_nr_cpus[TC2_CLUSTERS];
+
+static int tc2_pm_cpu_powerup(unsigned int cpu, unsigned int cluster)
+{
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	if (cluster >= TC2_CLUSTERS || cpu >= tc2_nr_cpus[cluster])
+		return -EINVAL;
+	ve_spc_set_resume_addr(cluster, cpu,
+			       virt_to_phys(mcpm_entry_point));
+	ve_spc_cpu_wakeup_irq(cluster, cpu, true);
+	return 0;
+}
+
+static int tc2_pm_cluster_powerup(unsigned int cluster)
+{
+	pr_debug("%s: cluster %u\n", __func__, cluster);
+	if (cluster >= TC2_CLUSTERS)
+		return -EINVAL;
+	ve_spc_powerdown(cluster, false);
+	return 0;
+}
+
+static void tc2_pm_cpu_powerdown_prepare(unsigned int cpu, unsigned int cluster)
+{
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	BUG_ON(cluster >= TC2_CLUSTERS || cpu >= TC2_MAX_CPUS_PER_CLUSTER);
+	ve_spc_cpu_wakeup_irq(cluster, cpu, true);
+	/*
+	 * If the CPU is committed to power down, make sure
+	 * the power controller will be in charge of waking it
+	 * up upon IRQ, ie IRQ lines are cut from GIC CPU IF
+	 * to the CPU by disabling the GIC CPU IF to prevent wfi
+	 * from completing execution behind power controller back
+	 */
+	gic_cpu_if_down(0);
+}
+
+static void tc2_pm_cluster_powerdown_prepare(unsigned int cluster)
+{
+	pr_debug("%s: cluster %u\n", __func__, cluster);
+	BUG_ON(cluster >= TC2_CLUSTERS);
+	ve_spc_powerdown(cluster, true);
+	ve_spc_global_wakeup_irq(true);
+}
+
+static void tc2_pm_cpu_cache_disable(void)
+{
+	v7_exit_coherency_flush(louis);
+}
+
+static void tc2_pm_cluster_cache_disable(void)
+{
+	if (read_cpuid_part() == ARM_CPU_PART_CORTEX_A15) {
+		/*
+		 * On the Cortex-A15 we need to disable
+		 * L2 prefetching before flushing the cache.
+		 */
+		asm volatile(
+		"mcr	p15, 1, %0, c15, c0, 3 \n\t"
+		"isb	\n\t"
+		"dsb	"
+		: : "r" (0x400) );
+	}
+
+	v7_exit_coherency_flush(all);
+	cci_disable_port_by_cpu(read_cpuid_mpidr());
+}
+
+static int tc2_core_in_reset(unsigned int cpu, unsigned int cluster)
+{
+	u32 mask = cluster ?
+		  RESET_A7_NCORERESET(cpu)
+		: RESET_A15_NCORERESET(cpu);
+
+	return !(readl_relaxed(scc + RESET_CTRL) & mask);
+}
+
+#define POLL_MSEC 10
+#define TIMEOUT_MSEC 1000
+
+static int tc2_pm_wait_for_powerdown(unsigned int cpu, unsigned int cluster)
+{
+	unsigned tries;
+
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	BUG_ON(cluster >= TC2_CLUSTERS || cpu >= TC2_MAX_CPUS_PER_CLUSTER);
+
+	for (tries = 0; tries < TIMEOUT_MSEC / POLL_MSEC; ++tries) {
+		pr_debug("%s(cpu=%u, cluster=%u): RESET_CTRL = 0x%08X\n",
+			 __func__, cpu, cluster,
+			 readl_relaxed(scc + RESET_CTRL));
+
+		/*
+		 * We need the CPU to reach WFI, but the power
+		 * controller may put the cluster in reset and
+		 * power it off as soon as that happens, before
+		 * we have a chance to see STANDBYWFI.
+		 *
+		 * So we need to check for both conditions:
+		 */
+		if (tc2_core_in_reset(cpu, cluster) ||
+		    ve_spc_cpu_in_wfi(cpu, cluster))
+			return 0; /* success: the CPU is halted */
+
+		/* Otherwise, wait and retry: */
+		msleep(POLL_MSEC);
+	}
+
+	return -ETIMEDOUT; /* timeout */
+}
+
+static void tc2_pm_cpu_suspend_prepare(unsigned int cpu, unsigned int cluster)
+{
+	ve_spc_set_resume_addr(cluster, cpu, virt_to_phys(mcpm_entry_point));
+}
+
+static void tc2_pm_cpu_is_up(unsigned int cpu, unsigned int cluster)
+{
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	BUG_ON(cluster >= TC2_CLUSTERS || cpu >= TC2_MAX_CPUS_PER_CLUSTER);
+	ve_spc_cpu_wakeup_irq(cluster, cpu, false);
+	ve_spc_set_resume_addr(cluster, cpu, 0);
+}
+
+static void tc2_pm_cluster_is_up(unsigned int cluster)
+{
+	pr_debug("%s: cluster %u\n", __func__, cluster);
+	BUG_ON(cluster >= TC2_CLUSTERS);
+	ve_spc_powerdown(cluster, false);
+	ve_spc_global_wakeup_irq(false);
+}
+
+static const struct mcpm_platform_ops tc2_pm_power_ops = {
+	.cpu_powerup		= tc2_pm_cpu_powerup,
+	.cluster_powerup	= tc2_pm_cluster_powerup,
+	.cpu_suspend_prepare	= tc2_pm_cpu_suspend_prepare,
+	.cpu_powerdown_prepare	= tc2_pm_cpu_powerdown_prepare,
+	.cluster_powerdown_prepare = tc2_pm_cluster_powerdown_prepare,
+	.cpu_cache_disable	= tc2_pm_cpu_cache_disable,
+	.cluster_cache_disable	= tc2_pm_cluster_cache_disable,
+	.wait_for_powerdown	= tc2_pm_wait_for_powerdown,
+	.cpu_is_up		= tc2_pm_cpu_is_up,
+	.cluster_is_up		= tc2_pm_cluster_is_up,
+};
+
+/*
+ * Enable cluster-level coherency, in preparation for turning on the MMU.
+ */
+static void __naked tc2_pm_power_up_setup(unsigned int affinity_level)
+{
+	asm volatile (" \n"
+"	cmp	r0, #1 \n"
+"	bxne	lr \n"
+"	b	cci_enable_port_for_self ");
+}
+
+static int __init tc2_pm_init(void)
+{
+	unsigned int mpidr, cpu, cluster;
+	int ret, irq;
+	u32 a15_cluster_id, a7_cluster_id, sys_info;
+	struct device_node *np;
+
+	/*
+	 * The power management-related features are hidden behind
+	 * SCC registers. We need to extract runtime information like
+	 * cluster ids and number of CPUs really available in clusters.
+	 */
+	np = of_find_compatible_node(NULL, NULL,
+			"arm,vexpress-scc,v2p-ca15_a7");
+	scc = of_iomap(np, 0);
+	if (!scc)
+		return -ENODEV;
+
+	a15_cluster_id = readl_relaxed(scc + A15_CONF) & 0xf;
+	a7_cluster_id = readl_relaxed(scc + A7_CONF) & 0xf;
+	if (a15_cluster_id >= TC2_CLUSTERS || a7_cluster_id >= TC2_CLUSTERS)
+		return -EINVAL;
+
+	sys_info = readl_relaxed(scc + SYS_INFO);
+	tc2_nr_cpus[a15_cluster_id] = (sys_info >> 16) & 0xf;
+	tc2_nr_cpus[a7_cluster_id] = (sys_info >> 20) & 0xf;
+
+	irq = irq_of_parse_and_map(np, 0);
+
+	/*
+	 * A subset of the SCC registers is also used to communicate
+	 * with the SPC (power controller). We need to be able to
+	 * drive it very early in the boot process to power up
+	 * processors, so we initialize the SPC driver here.
+	 */
+	ret = ve_spc_init(scc + SPC_BASE, a15_cluster_id, irq);
+	if (ret)
+		return ret;
+
+	if (!cci_probed())
+		return -ENODEV;
+
+	mpidr = read_cpuid_mpidr();
+	cpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
+	cluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+	pr_debug("%s: cpu %u cluster %u\n", __func__, cpu, cluster);
+	if (cluster >= TC2_CLUSTERS || cpu >= tc2_nr_cpus[cluster]) {
+		pr_err("%s: boot CPU is out of bound!\n", __func__);
+		return -EINVAL;
+	}
+
+	ret = mcpm_platform_register(&tc2_pm_power_ops);
+	if (!ret) {
+		mcpm_sync_init(tc2_pm_power_up_setup);
+		/* test if we can (re)enable the CCI on our own */
+		BUG_ON(mcpm_loopback(tc2_pm_cluster_cache_disable) != 0);
+		pr_info("TC2 power management initialized\n");
+	}
+	return ret;
+}
+
+early_initcall(tc2_pm_init);

arch/arm/mach-vexpress/v2m-mps2.c

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2015 ARM Limited
+ *
+ * Author: Vladimir Murzin <vladimir.murzin@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <asm/mach/arch.h>
+
+static const char *const mps2_compat[] __initconst = {
+	"arm,mps2",
+	NULL
+};
+
+DT_MACHINE_START(MPS2DT, "MPS2 (Device Tree Support)")
+	.dt_compat = mps2_compat,
+MACHINE_END

arch/arm/mach-vexpress/v2m.c

@@ -0,0 +1,16 @@
+#include <asm/mach/arch.h>
+
+#include "core.h"
+
+static const char * const v2m_dt_match[] __initconst = {
+	"arm,vexpress",
+	NULL,
+};
+
+DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
+	.dt_compat	= v2m_dt_match,
+	.l2c_aux_val	= 0x00400000,
+	.l2c_aux_mask	= 0xfe0fffff,
+	.smp		= smp_ops(vexpress_smp_dt_ops),
+	.smp_init	= smp_init_ops(vexpress_smp_init_ops),
+MACHINE_END

arch/arm/mach-vt8500/Kconfig

@@ -0,0 +1,29 @@
+config ARCH_VT8500
+	bool
+	select GPIOLIB
+	select CLKDEV_LOOKUP
+	select VT8500_TIMER
+	select PINCTRL
+	help
+	  Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
+
+config ARCH_WM8505
+	bool "VIA/Wondermedia 85xx and WM8650"
+ 	depends on ARCH_MULTI_V5
+ 	select ARCH_VT8500
+ 	select CPU_ARM926T
+ 	help
+
+config ARCH_WM8750
+	bool "WonderMedia WM8750"
+	depends on ARCH_MULTI_V6
+	select ARCH_VT8500
+	help
+	  Support for WonderMedia WM8750 System-on-Chip.
+
+config ARCH_WM8850
+	bool "WonderMedia WM8850"
+	depends on ARCH_MULTI_V7
+	select ARCH_VT8500
+	help
+	  Support for WonderMedia WM8850 System-on-Chip.

arch/arm/mach-vt8500/Makefile

@@ -0,0 +1 @@
+obj-$(CONFIG_ARCH_VT8500) += vt8500.o

arch/arm/mach-vt8500/Makefile.boot

@@ -0,0 +1,3 @@
+   zreladdr-y	+= 0x00008000
+params_phys-y	:= 0x00000100
+initrd_phys-y	:= 0x01000000

arch/arm/mach-vt8500/vt8500.c

@@ -0,0 +1,177 @@
+/*
+ *  arch/arm/mach-vt8500/vt8500.c
+ *
+ *  Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/io.h>
+#include <linux/pm.h>
+#include <linux/reboot.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/mach/map.h>
+
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#define LEGACY_GPIO_BASE	0xD8110000
+#define LEGACY_PMC_BASE		0xD8130000
+
+/* Registers in GPIO Controller */
+#define VT8500_GPIO_MUX_REG	0x200
+
+/* Registers in Power Management Controller */
+#define VT8500_HCR_REG		0x12
+#define VT8500_PMSR_REG		0x60
+
+static void __iomem *pmc_base;
+
+static void vt8500_restart(enum reboot_mode mode, const char *cmd)
+{
+	if (pmc_base)
+		writel(1, pmc_base + VT8500_PMSR_REG);
+}
+
+static struct map_desc vt8500_io_desc[] __initdata = {
+	/* SoC MMIO registers */
+	[0] = {
+		.virtual	= 0xf8000000,
+		.pfn		= __phys_to_pfn(0xd8000000),
+		.length		= 0x00390000, /* max of all chip variants */
+		.type		= MT_DEVICE
+	},
+};
+
+static void __init vt8500_map_io(void)
+{
+	iotable_init(vt8500_io_desc, ARRAY_SIZE(vt8500_io_desc));
+}
+
+static void vt8500_power_off(void)
+{
+	local_irq_disable();
+	writew(5, pmc_base + VT8500_HCR_REG);
+	asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (0));
+}
+
+static void __init vt8500_init(void)
+{
+	struct device_node *np;
+#if defined(CONFIG_FB_VT8500) || defined(CONFIG_FB_WM8505)
+	struct device_node *fb;
+	void __iomem *gpio_base;
+#endif
+
+#ifdef CONFIG_FB_VT8500
+	fb = of_find_compatible_node(NULL, NULL, "via,vt8500-fb");
+	if (fb) {
+		np = of_find_compatible_node(NULL, NULL, "via,vt8500-gpio");
+		if (np) {
+			gpio_base = of_iomap(np, 0);
+
+			if (!gpio_base)
+				pr_err("%s: of_iomap(gpio_mux) failed\n",
+								__func__);
+
+			of_node_put(np);
+		} else {
+			gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
+			if (!gpio_base)
+				pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
+								__func__);
+		}
+		if (gpio_base) {
+			writel(readl(gpio_base + VT8500_GPIO_MUX_REG) | 1,
+				gpio_base + VT8500_GPIO_MUX_REG);
+			iounmap(gpio_base);
+		} else
+			pr_err("%s: Could not remap GPIO mux\n", __func__);
+
+		of_node_put(fb);
+	}
+#endif
+
+#ifdef CONFIG_FB_WM8505
+	fb = of_find_compatible_node(NULL, NULL, "wm,wm8505-fb");
+	if (fb) {
+		np = of_find_compatible_node(NULL, NULL, "wm,wm8505-gpio");
+		if (!np)
+			np = of_find_compatible_node(NULL, NULL,
+							"wm,wm8650-gpio");
+		if (np) {
+			gpio_base = of_iomap(np, 0);
+
+			if (!gpio_base)
+				pr_err("%s: of_iomap(gpio_mux) failed\n",
+								__func__);
+
+			of_node_put(np);
+		} else {
+			gpio_base = ioremap(LEGACY_GPIO_BASE, 0x1000);
+			if (!gpio_base)
+				pr_err("%s: ioremap(legacy_gpio_mux) failed\n",
+								__func__);
+		}
+		if (gpio_base) {
+			writel(readl(gpio_base + VT8500_GPIO_MUX_REG) |
+				0x80000000, gpio_base + VT8500_GPIO_MUX_REG);
+			iounmap(gpio_base);
+		} else
+			pr_err("%s: Could not remap GPIO mux\n", __func__);
+
+		of_node_put(fb);
+	}
+#endif
+
+	np = of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
+	if (np) {
+		pmc_base = of_iomap(np, 0);
+
+		if (!pmc_base)
+			pr_err("%s:of_iomap(pmc) failed\n", __func__);
+
+		of_node_put(np);
+	} else {
+		pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
+		if (!pmc_base)
+			pr_err("%s:ioremap(power_off) failed\n", __func__);
+	}
+	if (pmc_base)
+		pm_power_off = &vt8500_power_off;
+	else
+		pr_err("%s: PMC Hibernation register could not be remapped, not enabling power off!\n", __func__);
+}
+
+static const char * const vt8500_dt_compat[] = {
+	"via,vt8500",
+	"wm,wm8650",
+	"wm,wm8505",
+	"wm,wm8750",
+	"wm,wm8850",
+	NULL
+};
+
+DT_MACHINE_START(WMT_DT, "VIA/Wondermedia SoC (Device Tree Support)")
+	.dt_compat	= vt8500_dt_compat,
+	.map_io		= vt8500_map_io,
+	.init_machine	= vt8500_init,
+	.restart	= vt8500_restart,
+MACHINE_END
+

arch/arm/mach-w90x900/Kconfig

@@ -0,0 +1,49 @@
+if ARCH_W90X900
+
+config CPU_W90P910
+	bool
+	help
+	  Support for W90P910 of Nuvoton W90X900 CPUs.
+
+config CPU_NUC950
+	bool
+	help
+	  Support for NUCP950 of Nuvoton NUC900 CPUs.
+
+config CPU_NUC960
+	bool
+	help
+	  Support for NUCP960 of Nuvoton NUC900 CPUs.
+
+menu "W90P910 Machines"
+
+config MACH_W90P910EVB
+	bool "Nuvoton W90P910 Evaluation Board"
+	default y
+	select CPU_W90P910
+	help
+	   Say Y here if you are using the Nuvoton W90P910EVB
+
+endmenu
+
+menu "NUC950 Machines"
+
+config MACH_W90P950EVB
+	bool "Nuvoton NUC950 Evaluation Board"
+	select CPU_NUC950
+	help
+	   Say Y here if you are using the Nuvoton NUC950EVB
+
+endmenu
+
+menu "NUC960 Machines"
+
+config MACH_W90N960EVB
+	bool "Nuvoton NUC960 Evaluation Board"
+	select CPU_NUC960
+	help
+	   Say Y here if you are using the Nuvoton NUC960EVB
+
+endmenu
+
+endif

arch/arm/mach-w90x900/Makefile

@@ -0,0 +1,19 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-y				:= irq.o time.o mfp.o gpio.o clock.o
+obj-y				+= clksel.o dev.o cpu.o
+# W90X900 CPU support files
+
+obj-$(CONFIG_CPU_W90P910)	+= nuc910.o
+obj-$(CONFIG_CPU_NUC950)	+= nuc950.o
+obj-$(CONFIG_CPU_NUC960)	+= nuc960.o
+
+# machine support
+
+obj-$(CONFIG_MACH_W90P910EVB)	+= mach-nuc910evb.o
+obj-$(CONFIG_MACH_W90P950EVB)	+= mach-nuc950evb.o
+obj-$(CONFIG_MACH_W90N960EVB)	+= mach-nuc960evb.o

arch/arm/mach-w90x900/Makefile.boot

@@ -0,0 +1,3 @@
+zreladdr-y	+= 0x00008000
+params_phys-y	:= 0x00000100
+

arch/arm/mach-w90x900/clksel.c

@@ -0,0 +1,91 @@
+/*
+ * linux/arch/arm/mach-w90x900/clksel.c
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-clock.h>
+
+#define PLL0		0x00
+#define PLL1		0x01
+#define OTHER		0x02
+#define EXT		0x03
+#define MSOFFSET	0x0C
+#define ATAOFFSET	0x0a
+#define LCDOFFSET	0x06
+#define AUDOFFSET	0x04
+#define CPUOFFSET	0x00
+
+static DEFINE_MUTEX(clksel_sem);
+
+static void clock_source_select(const char *dev_id, unsigned int clkval)
+{
+	unsigned int clksel, offset;
+
+	clksel = __raw_readl(REG_CLKSEL);
+
+	if (strcmp(dev_id, "nuc900-ms") == 0)
+		offset = MSOFFSET;
+	else if (strcmp(dev_id, "nuc900-atapi") == 0)
+		offset = ATAOFFSET;
+	else if (strcmp(dev_id, "nuc900-lcd") == 0)
+		offset = LCDOFFSET;
+	else if (strcmp(dev_id, "nuc900-ac97") == 0)
+		offset = AUDOFFSET;
+	else
+		offset = CPUOFFSET;
+
+	clksel &= ~(0x03 << offset);
+	clksel |= (clkval << offset);
+
+	__raw_writel(clksel, REG_CLKSEL);
+}
+
+void nuc900_clock_source(struct device *dev, unsigned char *src)
+{
+	unsigned int clkval;
+	const char *dev_id;
+
+	BUG_ON(!src);
+	clkval = 0;
+
+	mutex_lock(&clksel_sem);
+
+	if (dev)
+		dev_id = dev_name(dev);
+	else
+		dev_id = "cpufreq";
+
+	if (strcmp(src, "pll0") == 0)
+		clkval = PLL0;
+	else if (strcmp(src, "pll1") == 0)
+		clkval = PLL1;
+	else if (strcmp(src, "ext") == 0)
+		clkval = EXT;
+	else if (strcmp(src, "oth") == 0)
+		clkval = OTHER;
+
+	clock_source_select(dev_id, clkval);
+
+	mutex_unlock(&clksel_sem);
+}
+EXPORT_SYMBOL(nuc900_clock_source);
+

arch/arm/mach-w90x900/clock.c

@@ -0,0 +1,92 @@
+/*
+ * linux/arch/arm/mach-w90x900/clock.c
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/clk.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+
+#include "clock.h"
+
+#define SUBCLK 0x24
+
+static DEFINE_SPINLOCK(clocks_lock);
+
+int clk_enable(struct clk *clk)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&clocks_lock, flags);
+	if (clk->enabled++ == 0)
+		(clk->enable)(clk, 1);
+	spin_unlock_irqrestore(&clocks_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+	unsigned long flags;
+
+	WARN_ON(clk->enabled == 0);
+
+	spin_lock_irqsave(&clocks_lock, flags);
+	if (--clk->enabled == 0)
+		(clk->enable)(clk, 0);
+	spin_unlock_irqrestore(&clocks_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+	return 15000000;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+void nuc900_clk_enable(struct clk *clk, int enable)
+{
+	unsigned int clocks = clk->cken;
+	unsigned long clken;
+
+	clken = __raw_readl(W90X900_VA_CLKPWR);
+
+	if (enable)
+		clken |= clocks;
+	else
+		clken &= ~clocks;
+
+	__raw_writel(clken, W90X900_VA_CLKPWR);
+}
+
+void nuc900_subclk_enable(struct clk *clk, int enable)
+{
+	unsigned int clocks = clk->cken;
+	unsigned long clken;
+
+	clken = __raw_readl(W90X900_VA_CLKPWR + SUBCLK);
+
+	if (enable)
+		clken |= clocks;
+	else
+		clken &= ~clocks;
+
+	__raw_writel(clken, W90X900_VA_CLKPWR + SUBCLK);
+}

arch/arm/mach-w90x900/clock.h

@@ -0,0 +1,43 @@
+/*
+ * linux/arch/arm/mach-w90x900/clock.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ */
+
+#include <linux/clkdev.h>
+
+void nuc900_clk_enable(struct clk *clk, int enable);
+void nuc900_subclk_enable(struct clk *clk, int enable);
+
+struct clk {
+	unsigned long		cken;
+	unsigned int		enabled;
+	void			(*enable)(struct clk *, int enable);
+};
+
+#define DEFINE_CLK(_name, _ctrlbit)			\
+struct clk clk_##_name = {				\
+		.enable	= nuc900_clk_enable,		\
+		.cken	= (1 << _ctrlbit),		\
+	}
+
+#define DEFINE_SUBCLK(_name, _ctrlbit)			\
+struct clk clk_##_name = {				\
+		.enable	= nuc900_subclk_enable,	\
+		.cken	= (1 << _ctrlbit),		\
+	}
+
+
+#define DEF_CLKLOOK(_clk, _devname, _conname)		\
+	{						\
+		.clk		= _clk,			\
+		.dev_id		= _devname,		\
+		.con_id		= _conname,		\
+	}
+

arch/arm/mach-w90x900/cpu.c

@@ -0,0 +1,242 @@
+/*
+ * linux/arch/arm/mach-w90x900/cpu.c
+ *
+ * Copyright (c) 2009 Nuvoton corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * NUC900 series cpu common support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/serial_8250.h>
+#include <linux/delay.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/irq.h>
+#include <asm/system_misc.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-serial.h>
+#include <mach/regs-clock.h>
+#include "regs-ebi.h"
+#include "regs-timer.h"
+
+#include "cpu.h"
+#include "clock.h"
+#include "nuc9xx.h"
+
+/* Initial IO mappings */
+
+static struct map_desc nuc900_iodesc[] __initdata = {
+	IODESC_ENT(IRQ),
+	IODESC_ENT(GCR),
+	IODESC_ENT(UART),
+	IODESC_ENT(TIMER),
+	IODESC_ENT(EBI),
+	IODESC_ENT(GPIO),
+};
+
+/* Initial clock declarations. */
+static DEFINE_CLK(lcd, 0);
+static DEFINE_CLK(audio, 1);
+static DEFINE_CLK(fmi, 4);
+static DEFINE_SUBCLK(ms, 0);
+static DEFINE_SUBCLK(sd, 1);
+static DEFINE_CLK(dmac, 5);
+static DEFINE_CLK(atapi, 6);
+static DEFINE_CLK(emc, 7);
+static DEFINE_SUBCLK(rmii, 2);
+static DEFINE_CLK(usbd, 8);
+static DEFINE_CLK(usbh, 9);
+static DEFINE_CLK(g2d, 10);
+static DEFINE_CLK(pwm, 18);
+static DEFINE_CLK(ps2, 24);
+static DEFINE_CLK(kpi, 25);
+static DEFINE_CLK(wdt, 26);
+static DEFINE_CLK(gdma, 27);
+static DEFINE_CLK(adc, 28);
+static DEFINE_CLK(usi, 29);
+static DEFINE_CLK(ext, 0);
+static DEFINE_CLK(timer0, 19);
+static DEFINE_CLK(timer1, 20);
+static DEFINE_CLK(timer2, 21);
+static DEFINE_CLK(timer3, 22);
+static DEFINE_CLK(timer4, 23);
+
+static struct clk_lookup nuc900_clkregs[] = {
+	DEF_CLKLOOK(&clk_lcd, "nuc900-lcd", NULL),
+	DEF_CLKLOOK(&clk_audio, "nuc900-ac97", NULL),
+	DEF_CLKLOOK(&clk_fmi, "nuc900-fmi", NULL),
+	DEF_CLKLOOK(&clk_ms, "nuc900-fmi", "MS"),
+	DEF_CLKLOOK(&clk_sd, "nuc900-fmi", "SD"),
+	DEF_CLKLOOK(&clk_dmac, "nuc900-dmac", NULL),
+	DEF_CLKLOOK(&clk_atapi, "nuc900-atapi", NULL),
+	DEF_CLKLOOK(&clk_emc, "nuc900-emc", NULL),
+	DEF_CLKLOOK(&clk_rmii, "nuc900-emc", "RMII"),
+	DEF_CLKLOOK(&clk_usbd, "nuc900-usbd", NULL),
+	DEF_CLKLOOK(&clk_usbh, "nuc900-usbh", NULL),
+	DEF_CLKLOOK(&clk_g2d, "nuc900-g2d", NULL),
+	DEF_CLKLOOK(&clk_pwm, "nuc900-pwm", NULL),
+	DEF_CLKLOOK(&clk_ps2, "nuc900-ps2", NULL),
+	DEF_CLKLOOK(&clk_kpi, "nuc900-kpi", NULL),
+	DEF_CLKLOOK(&clk_wdt, "nuc900-wdt", NULL),
+	DEF_CLKLOOK(&clk_gdma, "nuc900-gdma", NULL),
+	DEF_CLKLOOK(&clk_adc, "nuc900-ts", NULL),
+	DEF_CLKLOOK(&clk_usi, "nuc900-spi", NULL),
+	DEF_CLKLOOK(&clk_ext, NULL, "ext"),
+	DEF_CLKLOOK(&clk_timer0, NULL, "timer0"),
+	DEF_CLKLOOK(&clk_timer1, NULL, "timer1"),
+	DEF_CLKLOOK(&clk_timer2, NULL, "timer2"),
+	DEF_CLKLOOK(&clk_timer3, NULL, "timer3"),
+	DEF_CLKLOOK(&clk_timer4, NULL, "timer4"),
+};
+
+/* Initial serial platform data */
+
+struct plat_serial8250_port nuc900_uart_data[] = {
+	NUC900_8250PORT(UART0),
+	{},
+};
+
+struct platform_device nuc900_serial_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= nuc900_uart_data,
+	},
+};
+
+/*Set NUC900 series cpu frequence*/
+static int __init nuc900_set_clkval(unsigned int cpufreq)
+{
+	unsigned int pllclk, ahbclk, apbclk, val;
+
+	pllclk = 0;
+	ahbclk = 0;
+	apbclk = 0;
+
+	switch (cpufreq) {
+	case 66:
+		pllclk = PLL_66MHZ;
+		ahbclk = AHB_CPUCLK_1_1;
+		apbclk = APB_AHB_1_2;
+		break;
+
+	case 100:
+		pllclk = PLL_100MHZ;
+		ahbclk = AHB_CPUCLK_1_1;
+		apbclk = APB_AHB_1_2;
+		break;
+
+	case 120:
+		pllclk = PLL_120MHZ;
+		ahbclk = AHB_CPUCLK_1_2;
+		apbclk = APB_AHB_1_2;
+		break;
+
+	case 166:
+		pllclk = PLL_166MHZ;
+		ahbclk = AHB_CPUCLK_1_2;
+		apbclk = APB_AHB_1_2;
+		break;
+
+	case 200:
+		pllclk = PLL_200MHZ;
+		ahbclk = AHB_CPUCLK_1_2;
+		apbclk = APB_AHB_1_2;
+		break;
+	}
+
+	__raw_writel(pllclk, REG_PLLCON0);
+
+	val = __raw_readl(REG_CLKDIV);
+	val &= ~(0x03 << 24 | 0x03 << 26);
+	val |= (ahbclk << 24 | apbclk << 26);
+	__raw_writel(val, REG_CLKDIV);
+
+	return 	0;
+}
+static int __init nuc900_set_cpufreq(char *str)
+{
+	unsigned long cpufreq, val;
+
+	if (!*str)
+		return 0;
+
+	if (kstrtoul(str, 0, &cpufreq))
+		return 0;
+
+	nuc900_clock_source(NULL, "ext");
+
+	nuc900_set_clkval(cpufreq);
+
+	mdelay(1);
+
+	val = __raw_readl(REG_CKSKEW);
+	val &= ~0xff;
+	val |= DEFAULTSKEW;
+	__raw_writel(val, REG_CKSKEW);
+
+	nuc900_clock_source(NULL, "pll0");
+
+	return 1;
+}
+
+__setup("cpufreq=", nuc900_set_cpufreq);
+
+/*Init NUC900 evb io*/
+
+void __init nuc900_map_io(struct map_desc *mach_desc, int mach_size)
+{
+	unsigned long idcode = 0x0;
+
+	iotable_init(mach_desc, mach_size);
+	iotable_init(nuc900_iodesc, ARRAY_SIZE(nuc900_iodesc));
+
+	idcode = __raw_readl(NUC900PDID);
+	if (idcode == NUC910_CPUID)
+		printk(KERN_INFO "CPU type 0x%08lx is NUC910\n", idcode);
+	else if (idcode == NUC920_CPUID)
+		printk(KERN_INFO "CPU type 0x%08lx is NUC920\n", idcode);
+	else if (idcode == NUC950_CPUID)
+		printk(KERN_INFO "CPU type 0x%08lx is NUC950\n", idcode);
+	else if (idcode == NUC960_CPUID)
+		printk(KERN_INFO "CPU type 0x%08lx is NUC960\n", idcode);
+}
+
+/*Init NUC900 clock*/
+
+void __init nuc900_init_clocks(void)
+{
+	clkdev_add_table(nuc900_clkregs, ARRAY_SIZE(nuc900_clkregs));
+}
+
+#define	WTCR	(TMR_BA + 0x1C)
+#define	WTCLK	(1 << 10)
+#define	WTE	(1 << 7)
+#define	WTRE	(1 << 1)
+
+void nuc9xx_restart(enum reboot_mode mode, const char *cmd)
+{
+	if (mode == REBOOT_SOFT) {
+		/* Jump into ROM at address 0 */
+		soft_restart(0);
+	} else {
+		__raw_writel(WTE | WTRE | WTCLK, WTCR);
+	}
+}

arch/arm/mach-w90x900/cpu.h

@@ -0,0 +1,60 @@
+/*
+ * arch/arm/mach-w90x900/cpu.h
+ *
+ * Based on linux/include/asm-arm/plat-s3c24xx/cpu.h by Ben Dooks
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Header file for NUC900 CPU support
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#define IODESC_ENT(y)                                  \
+{                                                      \
+       .virtual = (unsigned long)W90X900_VA_##y,       \
+       .pfn     = __phys_to_pfn(W90X900_PA_##y),       \
+       .length  = W90X900_SZ_##y,                      \
+       .type    = MT_DEVICE,                           \
+}
+
+#define NUC900_8250PORT(name)					\
+{								\
+	.membase	= name##_BA,				\
+	.mapbase	= name##_PA,				\
+	.irq		= IRQ_##name,				\
+	.uartclk	= 11313600,				\
+	.regshift	= 2,					\
+	.iotype		= UPIO_MEM,				\
+	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
+}
+
+/*Cpu identifier register*/
+
+#define NUC900PDID	W90X900_VA_GCR
+#define NUC910_CPUID	0x02900910
+#define NUC920_CPUID	0x02900920
+#define NUC950_CPUID	0x02900950
+#define NUC960_CPUID	0x02900960
+
+/* extern file from cpu.c */
+
+extern void nuc900_clock_source(struct device *dev, unsigned char *src);
+extern void nuc900_init_clocks(void);
+extern void nuc900_map_io(struct map_desc *mach_desc, int mach_size);
+extern void nuc900_board_init(struct platform_device **device, int size);
+
+/* for either public between 910 and 920, or between 920 and 950 */
+
+extern struct platform_device nuc900_serial_device;
+extern struct platform_device nuc900_device_fmi;
+extern struct platform_device nuc900_device_kpi;
+extern struct platform_device nuc900_device_rtc;
+extern struct platform_device nuc900_device_ts;
+extern struct platform_device nuc900_device_lcd;

arch/arm/mach-w90x900/dev.c

@@ -0,0 +1,541 @@
+/*
+ * linux/arch/arm/mach-w90x900/dev.c
+ *
+ * Copyright (C) 2009 Nuvoton corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/flash.h>
+
+#include <asm/system_misc.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+#include <asm/mach-types.h>
+
+#include <mach/regs-serial.h>
+#include <linux/platform_data/spi-nuc900.h>
+#include <mach/map.h>
+#include <linux/platform_data/video-nuc900fb.h>
+#include <mach/regs-ldm.h>
+#include <linux/platform_data/keypad-w90p910.h>
+
+#include "cpu.h"
+
+/*NUC900 evb norflash driver data */
+
+#define NUC900_FLASH_BASE	0xA0000000
+#define NUC900_FLASH_SIZE	0x400000
+#define SPIOFFSET		0x200
+#define SPIOREG_SIZE		0x100
+
+static struct mtd_partition nuc900_flash_partitions[] = {
+	{
+		.name	=	"NOR Partition 1 for kernel (960K)",
+		.size	=	0xF0000,
+		.offset	=	0x10000,
+	},
+	{
+		.name	=	"NOR Partition 2 for image (1M)",
+		.size	=	0x100000,
+		.offset	=	0x100000,
+	},
+	{
+		.name	=	"NOR Partition 3 for user (2M)",
+		.size	=	0x200000,
+		.offset	=	0x00200000,
+	}
+};
+
+static struct physmap_flash_data nuc900_flash_data = {
+	.width		=	2,
+	.parts		=	nuc900_flash_partitions,
+	.nr_parts	=	ARRAY_SIZE(nuc900_flash_partitions),
+};
+
+static struct resource nuc900_flash_resources[] = {
+	{
+		.start	=	NUC900_FLASH_BASE,
+		.end	=	NUC900_FLASH_BASE + NUC900_FLASH_SIZE - 1,
+		.flags	=	IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device nuc900_flash_device = {
+	.name		=	"physmap-flash",
+	.id		=	0,
+	.dev		= {
+				.platform_data = &nuc900_flash_data,
+			},
+	.resource	=	nuc900_flash_resources,
+	.num_resources	=	ARRAY_SIZE(nuc900_flash_resources),
+};
+
+/* USB EHCI Host Controller */
+
+static struct resource nuc900_usb_ehci_resource[] = {
+	[0] = {
+		.start = W90X900_PA_USBEHCIHOST,
+		.end   = W90X900_PA_USBEHCIHOST + W90X900_SZ_USBEHCIHOST - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_USBH,
+		.end   = IRQ_USBH,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static u64 nuc900_device_usb_ehci_dmamask = 0xffffffffUL;
+
+static struct platform_device nuc900_device_usb_ehci = {
+	.name		  = "nuc900-ehci",
+	.id		  = -1,
+	.num_resources	  = ARRAY_SIZE(nuc900_usb_ehci_resource),
+	.resource	  = nuc900_usb_ehci_resource,
+	.dev              = {
+		.dma_mask = &nuc900_device_usb_ehci_dmamask,
+		.coherent_dma_mask = 0xffffffffUL
+	}
+};
+
+/* USB OHCI Host Controller */
+
+static struct resource nuc900_usb_ohci_resource[] = {
+	[0] = {
+		.start = W90X900_PA_USBOHCIHOST,
+		.end   = W90X900_PA_USBOHCIHOST + W90X900_SZ_USBOHCIHOST - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_USBH,
+		.end   = IRQ_USBH,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static u64 nuc900_device_usb_ohci_dmamask = 0xffffffffUL;
+static struct platform_device nuc900_device_usb_ohci = {
+	.name		  = "nuc900-ohci",
+	.id		  = -1,
+	.num_resources	  = ARRAY_SIZE(nuc900_usb_ohci_resource),
+	.resource	  = nuc900_usb_ohci_resource,
+	.dev              = {
+		.dma_mask = &nuc900_device_usb_ohci_dmamask,
+		.coherent_dma_mask = 0xffffffffUL
+	}
+};
+
+/* USB Device (Gadget)*/
+
+static struct resource nuc900_usbgadget_resource[] = {
+	[0] = {
+		.start = W90X900_PA_USBDEV,
+		.end   = W90X900_PA_USBDEV + W90X900_SZ_USBDEV - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_USBD,
+		.end   = IRQ_USBD,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static struct platform_device nuc900_device_usbgadget = {
+	.name		= "nuc900-usbgadget",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_usbgadget_resource),
+	.resource	= nuc900_usbgadget_resource,
+};
+
+/* MAC device */
+
+static struct resource nuc900_emc_resource[] = {
+	[0] = {
+		.start = W90X900_PA_EMC,
+		.end   = W90X900_PA_EMC + W90X900_SZ_EMC - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_EMCTX,
+		.end   = IRQ_EMCTX,
+		.flags = IORESOURCE_IRQ,
+	},
+	[2] = {
+		.start = IRQ_EMCRX,
+		.end   = IRQ_EMCRX,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static u64 nuc900_device_emc_dmamask = 0xffffffffUL;
+static struct platform_device nuc900_device_emc = {
+	.name		= "nuc900-emc",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_emc_resource),
+	.resource	= nuc900_emc_resource,
+	.dev              = {
+		.dma_mask = &nuc900_device_emc_dmamask,
+		.coherent_dma_mask = 0xffffffffUL
+	}
+};
+
+/* SPI device */
+
+static struct nuc900_spi_info nuc900_spiflash_data = {
+	.num_cs		= 1,
+	.lsb		= 0,
+	.txneg		= 1,
+	.rxneg		= 0,
+	.divider	= 24,
+	.sleep		= 0,
+	.txnum		= 0,
+	.txbitlen	= 8,
+	.bus_num	= 0,
+};
+
+static struct resource nuc900_spi_resource[] = {
+	[0] = {
+		.start = W90X900_PA_I2C + SPIOFFSET,
+		.end   = W90X900_PA_I2C + SPIOFFSET + SPIOREG_SIZE - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_SSP,
+		.end   = IRQ_SSP,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static struct platform_device nuc900_device_spi = {
+	.name		= "nuc900-spi",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_spi_resource),
+	.resource	= nuc900_spi_resource,
+	.dev		= {
+				.platform_data = &nuc900_spiflash_data,
+			}
+};
+
+/* spi device, spi flash info */
+
+static struct mtd_partition nuc900_spi_flash_partitions[] = {
+	{
+		.name = "bootloader(spi)",
+		.size = 0x0100000,
+		.offset = 0,
+	},
+};
+
+static struct flash_platform_data nuc900_spi_flash_data = {
+	.name = "m25p80",
+	.parts =  nuc900_spi_flash_partitions,
+	.nr_parts = ARRAY_SIZE(nuc900_spi_flash_partitions),
+	.type = "w25x16",
+};
+
+static struct spi_board_info nuc900_spi_board_info[] __initdata = {
+	{
+		.modalias = "m25p80",
+		.max_speed_hz = 20000000,
+		.bus_num = 0,
+		.chip_select = 0,
+		.platform_data = &nuc900_spi_flash_data,
+		.mode = SPI_MODE_0,
+	},
+};
+
+/* WDT Device */
+
+static struct resource nuc900_wdt_resource[] = {
+	[0] = {
+		.start = W90X900_PA_TIMER,
+		.end   = W90X900_PA_TIMER + W90X900_SZ_TIMER - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_WDT,
+		.end   = IRQ_WDT,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static struct platform_device nuc900_device_wdt = {
+	.name		= "nuc900-wdt",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_wdt_resource),
+	.resource	= nuc900_wdt_resource,
+};
+
+/*
+ * public device definition between 910 and 920, or 910
+ * and 950 or 950 and 960...,their dev platform register
+ * should be in specific file such as nuc950, nuc960 c
+ * files rather than the public dev.c file here. so the
+ * corresponding platform_device definition should not be
+ * static.
+*/
+
+/* RTC controller*/
+
+static struct resource nuc900_rtc_resource[] = {
+	[0] = {
+		.start = W90X900_PA_RTC,
+		.end   = W90X900_PA_RTC + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_RTC,
+		.end   = IRQ_RTC,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device nuc900_device_rtc = {
+	.name		= "nuc900-rtc",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_rtc_resource),
+	.resource	= nuc900_rtc_resource,
+};
+
+/*TouchScreen controller*/
+
+static struct resource nuc900_ts_resource[] = {
+	[0] = {
+		.start = W90X900_PA_ADC,
+		.end   = W90X900_PA_ADC + W90X900_SZ_ADC-1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_ADC,
+		.end   = IRQ_ADC,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+struct platform_device nuc900_device_ts = {
+	.name		= "nuc900-ts",
+	.id		= -1,
+	.resource	= nuc900_ts_resource,
+	.num_resources	= ARRAY_SIZE(nuc900_ts_resource),
+};
+
+/* FMI Device */
+
+static struct resource nuc900_fmi_resource[] = {
+	[0] = {
+		.start = W90X900_PA_FMI,
+		.end   = W90X900_PA_FMI + W90X900_SZ_FMI - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_FMI,
+		.end   = IRQ_FMI,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+struct platform_device nuc900_device_fmi = {
+	.name		= "nuc900-fmi",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_fmi_resource),
+	.resource	= nuc900_fmi_resource,
+};
+
+/* KPI controller*/
+
+static int nuc900_keymap[] = {
+	KEY(0, 0, KEY_A),
+	KEY(0, 1, KEY_B),
+	KEY(0, 2, KEY_C),
+	KEY(0, 3, KEY_D),
+
+	KEY(1, 0, KEY_E),
+	KEY(1, 1, KEY_F),
+	KEY(1, 2, KEY_G),
+	KEY(1, 3, KEY_H),
+
+	KEY(2, 0, KEY_I),
+	KEY(2, 1, KEY_J),
+	KEY(2, 2, KEY_K),
+	KEY(2, 3, KEY_L),
+
+	KEY(3, 0, KEY_M),
+	KEY(3, 1, KEY_N),
+	KEY(3, 2, KEY_O),
+	KEY(3, 3, KEY_P),
+};
+
+static struct matrix_keymap_data nuc900_map_data = {
+	.keymap			= nuc900_keymap,
+	.keymap_size		= ARRAY_SIZE(nuc900_keymap),
+};
+
+struct w90p910_keypad_platform_data nuc900_keypad_info = {
+	.keymap_data	= &nuc900_map_data,
+	.prescale	= 0xfa,
+	.debounce	= 0x50,
+};
+
+static struct resource nuc900_kpi_resource[] = {
+	[0] = {
+		.start = W90X900_PA_KPI,
+		.end   = W90X900_PA_KPI + W90X900_SZ_KPI - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_KPI,
+		.end   = IRQ_KPI,
+		.flags = IORESOURCE_IRQ,
+	}
+
+};
+
+struct platform_device nuc900_device_kpi = {
+	.name		= "nuc900-kpi",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_kpi_resource),
+	.resource	= nuc900_kpi_resource,
+	.dev		= {
+				.platform_data = &nuc900_keypad_info,
+			}
+};
+
+/* LCD controller*/
+
+static struct nuc900fb_display nuc900_lcd_info[] = {
+	/* Giantplus Technology GPM1040A0 320x240 Color TFT LCD */
+	[0] = {
+		.type		= LCM_DCCS_VA_SRC_RGB565,
+		.width		= 320,
+		.height		= 240,
+		.xres		= 320,
+		.yres		= 240,
+		.bpp		= 16,
+		.pixclock	= 200000,
+		.left_margin	= 34,
+		.right_margin   = 54,
+		.hsync_len	= 10,
+		.upper_margin	= 18,
+		.lower_margin	= 4,
+		.vsync_len	= 1,
+		.dccs		= 0x8e00041a,
+		.devctl		= 0x060800c0,
+		.fbctrl		= 0x00a000a0,
+		.scale		= 0x04000400,
+	},
+};
+
+static struct nuc900fb_mach_info nuc900_fb_info = {
+#if defined(CONFIG_GPM1040A0_320X240)
+	.displays		= &nuc900_lcd_info[0],
+#else
+	.displays		= nuc900_lcd_info,
+#endif
+	.num_displays		= ARRAY_SIZE(nuc900_lcd_info),
+	.default_display	= 0,
+	.gpio_dir		= 0x00000004,
+	.gpio_dir_mask		= 0xFFFFFFFD,
+	.gpio_data		= 0x00000004,
+	.gpio_data_mask		= 0xFFFFFFFD,
+};
+
+static struct resource nuc900_lcd_resource[] = {
+	[0] = {
+		.start = W90X900_PA_LCD,
+		.end   = W90X900_PA_LCD + W90X900_SZ_LCD - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_LCD,
+		.end   = IRQ_LCD,
+		.flags = IORESOURCE_IRQ,
+	}
+};
+
+static u64 nuc900_device_lcd_dmamask = -1;
+struct platform_device nuc900_device_lcd = {
+	.name             = "nuc900-lcd",
+	.id               = -1,
+	.num_resources    = ARRAY_SIZE(nuc900_lcd_resource),
+	.resource         = nuc900_lcd_resource,
+	.dev              = {
+		.dma_mask               = &nuc900_device_lcd_dmamask,
+		.coherent_dma_mask      = -1,
+		.platform_data = &nuc900_fb_info,
+	}
+};
+
+/* AUDIO controller*/
+static u64 nuc900_device_audio_dmamask = -1;
+static struct resource nuc900_ac97_resource[] = {
+	[0] = {
+		.start = W90X900_PA_ACTL,
+		.end   = W90X900_PA_ACTL + W90X900_SZ_ACTL - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start = IRQ_ACTL,
+		.end   = IRQ_ACTL,
+		.flags = IORESOURCE_IRQ,
+	}
+
+};
+
+struct platform_device nuc900_device_ac97 = {
+	.name		= "nuc900-ac97",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(nuc900_ac97_resource),
+	.resource	= nuc900_ac97_resource,
+	.dev              = {
+		.dma_mask               = &nuc900_device_audio_dmamask,
+		.coherent_dma_mask      = -1,
+	}
+};
+
+/*Here should be your evb resourse,such as LCD*/
+
+static struct platform_device *nuc900_public_dev[] __initdata = {
+	&nuc900_serial_device,
+	&nuc900_flash_device,
+	&nuc900_device_usb_ehci,
+	&nuc900_device_usb_ohci,
+	&nuc900_device_usbgadget,
+	&nuc900_device_emc,
+	&nuc900_device_spi,
+	&nuc900_device_wdt,
+	&nuc900_device_ac97,
+};
+
+/* Provide adding specific CPU platform devices API */
+
+void __init nuc900_board_init(struct platform_device **device, int size)
+{
+	cpu_idle_poll_ctrl(true);
+	platform_add_devices(device, size);
+	platform_add_devices(nuc900_public_dev, ARRAY_SIZE(nuc900_public_dev));
+	spi_register_board_info(nuc900_spi_board_info,
+					ARRAY_SIZE(nuc900_spi_board_info));
+}
+

arch/arm/mach-w90x900/gpio.c

@@ -0,0 +1,153 @@
+/*
+ * linux/arch/arm/mach-w90x900/gpio.c
+ *
+ * Generic nuc900 GPIO handling
+ *
+ *  Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/gpio/driver.h>
+
+#include <mach/hardware.h>
+
+#define GPIO_BASE 		(W90X900_VA_GPIO)
+#define GPIO_DIR		(0x04)
+#define GPIO_OUT		(0x08)
+#define GPIO_IN			(0x0C)
+#define GROUPINERV		(0x10)
+#define GPIO_GPIO(Nb)		(0x00000001 << (Nb))
+
+#define NUC900_GPIO_CHIP(name, base_gpio, nr_gpio)			\
+	{								\
+		.chip = {						\
+			.label		  = name,			\
+			.direction_input  = nuc900_dir_input,		\
+			.direction_output = nuc900_dir_output,		\
+			.get		  = nuc900_gpio_get,		\
+			.set		  = nuc900_gpio_set,		\
+			.base		  = base_gpio,			\
+			.ngpio		  = nr_gpio,			\
+		}							\
+	}
+
+struct nuc900_gpio_chip {
+	struct gpio_chip	chip;
+	void __iomem		*regbase;	/* Base of group register*/
+	spinlock_t 		gpio_lock;
+};
+
+static int nuc900_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip);
+	void __iomem *pio = nuc900_gpio->regbase + GPIO_IN;
+	unsigned int regval;
+
+	regval = __raw_readl(pio);
+	regval &= GPIO_GPIO(offset);
+
+	return (regval != 0);
+}
+
+static void nuc900_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
+{
+	struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip);
+	void __iomem *pio = nuc900_gpio->regbase + GPIO_OUT;
+	unsigned int regval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&nuc900_gpio->gpio_lock, flags);
+
+	regval = __raw_readl(pio);
+
+	if (val)
+		regval |= GPIO_GPIO(offset);
+	else
+		regval &= ~GPIO_GPIO(offset);
+
+	__raw_writel(regval, pio);
+
+	spin_unlock_irqrestore(&nuc900_gpio->gpio_lock, flags);
+}
+
+static int nuc900_dir_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip);
+	void __iomem *pio = nuc900_gpio->regbase + GPIO_DIR;
+	unsigned int regval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&nuc900_gpio->gpio_lock, flags);
+
+	regval = __raw_readl(pio);
+	regval &= ~GPIO_GPIO(offset);
+	__raw_writel(regval, pio);
+
+	spin_unlock_irqrestore(&nuc900_gpio->gpio_lock, flags);
+
+	return 0;
+}
+
+static int nuc900_dir_output(struct gpio_chip *chip, unsigned offset, int val)
+{
+	struct nuc900_gpio_chip *nuc900_gpio = gpiochip_get_data(chip);
+	void __iomem *outreg = nuc900_gpio->regbase + GPIO_OUT;
+	void __iomem *pio = nuc900_gpio->regbase + GPIO_DIR;
+	unsigned int regval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&nuc900_gpio->gpio_lock, flags);
+
+	regval = __raw_readl(pio);
+	regval |= GPIO_GPIO(offset);
+	__raw_writel(regval, pio);
+
+	regval = __raw_readl(outreg);
+
+	if (val)
+		regval |= GPIO_GPIO(offset);
+	else
+		regval &= ~GPIO_GPIO(offset);
+
+	__raw_writel(regval, outreg);
+
+	spin_unlock_irqrestore(&nuc900_gpio->gpio_lock, flags);
+
+	return 0;
+}
+
+static struct nuc900_gpio_chip nuc900_gpio[] = {
+	NUC900_GPIO_CHIP("GROUPC", 0, 16),
+	NUC900_GPIO_CHIP("GROUPD", 16, 10),
+	NUC900_GPIO_CHIP("GROUPE", 26, 14),
+	NUC900_GPIO_CHIP("GROUPF", 40, 10),
+	NUC900_GPIO_CHIP("GROUPG", 50, 17),
+	NUC900_GPIO_CHIP("GROUPH", 67, 8),
+	NUC900_GPIO_CHIP("GROUPI", 75, 17),
+};
+
+void __init nuc900_init_gpio(int nr_group)
+{
+	unsigned	i;
+	struct nuc900_gpio_chip *gpio_chip;
+
+	for (i = 0; i < nr_group; i++) {
+		gpio_chip = &nuc900_gpio[i];
+		spin_lock_init(&gpio_chip->gpio_lock);
+		gpio_chip->regbase = GPIO_BASE + i * GROUPINERV;
+		gpiochip_add_data(&gpio_chip->chip, gpio_chip);
+	}
+}

arch/arm/mach-w90x900/include/mach/entry-macro.S

@@ -0,0 +1,26 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/entry-macro.S
+ *
+ * Low-level IRQ helper macros for W90P910-based platforms
+ *
+ * This file is licensed under  the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ */
+
+#include <mach/hardware.h>
+#include <mach/regs-irq.h>
+
+	.macro  get_irqnr_preamble, base, tmp
+	.endm
+
+	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
+
+		mov	\base, #AIC_BA
+
+		ldr	\irqnr, [\base, #AIC_IPER]
+		ldr	\irqnr, [\base, #AIC_ISNR]
+		cmp	\irqnr, #0
+
+	.endm

arch/arm/mach-w90x900/include/mach/hardware.h

@@ -0,0 +1,24 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/hardware.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/hardware.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+#include <asm/sizes.h>
+#include <mach/map.h>
+
+#endif /* __ASM_ARCH_HARDWARE_H */

arch/arm/mach-w90x900/include/mach/irqs.h

@@ -0,0 +1,86 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/irqs.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/irqs.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_IRQS_H
+#define __ASM_ARCH_IRQS_H
+
+/*
+ * we keep the first set of CPU IRQs out of the range of
+ * the ISA space, so that the PC104 has them to itself
+ * and we don't end up having to do horrible things to the
+ * standard ISA drivers....
+ *
+ */
+
+#define W90X900_IRQ(x)	(x)
+
+/* Main cpu interrupts */
+
+#define IRQ_WDT		W90X900_IRQ(1)
+#define IRQ_GROUP0	W90X900_IRQ(2)
+#define IRQ_GROUP1	W90X900_IRQ(3)
+#define IRQ_ACTL	W90X900_IRQ(4)
+#define IRQ_LCD		W90X900_IRQ(5)
+#define IRQ_RTC		W90X900_IRQ(6)
+#define IRQ_UART0	W90X900_IRQ(7)
+#define IRQ_UART1	W90X900_IRQ(8)
+#define IRQ_UART2	W90X900_IRQ(9)
+#define IRQ_UART3	W90X900_IRQ(10)
+#define IRQ_UART4	W90X900_IRQ(11)
+#define IRQ_TIMER0	W90X900_IRQ(12)
+#define IRQ_TIMER1	W90X900_IRQ(13)
+#define IRQ_T_INT_GROUP	W90X900_IRQ(14)
+#define IRQ_USBH	W90X900_IRQ(15)
+#define IRQ_EMCTX	W90X900_IRQ(16)
+#define IRQ_EMCRX	W90X900_IRQ(17)
+#define IRQ_GDMAGROUP	W90X900_IRQ(18)
+#define IRQ_DMAC	W90X900_IRQ(19)
+#define IRQ_FMI		W90X900_IRQ(20)
+#define IRQ_USBD	W90X900_IRQ(21)
+#define IRQ_ATAPI	W90X900_IRQ(22)
+#define IRQ_G2D		W90X900_IRQ(23)
+#define IRQ_PCI		W90X900_IRQ(24)
+#define IRQ_SCGROUP	W90X900_IRQ(25)
+#define IRQ_I2CGROUP	W90X900_IRQ(26)
+#define IRQ_SSP		W90X900_IRQ(27)
+#define IRQ_PWM		W90X900_IRQ(28)
+#define IRQ_KPI		W90X900_IRQ(29)
+#define IRQ_P2SGROUP	W90X900_IRQ(30)
+#define IRQ_ADC		W90X900_IRQ(31)
+#define NR_IRQS		(IRQ_ADC+1)
+
+/*for irq group*/
+
+#define	IRQ_PS2_PORT0	0x10000000
+#define	IRQ_PS2_PORT1	0x20000000
+#define	IRQ_I2C_LINE0	0x04000000
+#define	IRQ_I2C_LINE1	0x08000000
+#define	IRQ_SC_CARD0	0x01000000
+#define	IRQ_SC_CARD1	0x02000000
+#define	IRQ_GDMA_CH0	0x00100000
+#define	IRQ_GDMA_CH1	0x00200000
+#define	IRQ_TIMER2	0x00010000
+#define	IRQ_TIMER3	0x00020000
+#define	IRQ_TIMER4	0x00040000
+#define	IRQ_GROUP0_IRQ0	0x00000001
+#define	IRQ_GROUP0_IRQ1	0x00000002
+#define	IRQ_GROUP0_IRQ2	0x00000004
+#define	IRQ_GROUP0_IRQ3	0x00000008
+#define	IRQ_GROUP1_IRQ4	0x00000010
+#define	IRQ_GROUP1_IRQ5	0x00000020
+#define	IRQ_GROUP1_IRQ6	0x00000040
+#define	IRQ_GROUP1_IRQ7	0x00000080
+
+#endif /* __ASM_ARCH_IRQ_H */

arch/arm/mach-w90x900/include/mach/map.h

@@ -0,0 +1,157 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/map.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/map.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_MAP_H
+#define __ASM_ARCH_MAP_H
+
+#ifndef __ASSEMBLY__
+#define W90X900_ADDR(x)		((void __iomem *)(0xF0000000 + (x)))
+#else
+#define W90X900_ADDR(x)		(0xF0000000 + (x))
+#endif
+
+#define AHB_IO_BASE		0xB0000000
+#define APB_IO_BASE		0xB8000000
+#define CLOCKPW_BASE		(APB_IO_BASE+0x200)
+#define AIC_IO_BASE		(APB_IO_BASE+0x2000)
+#define TIMER_IO_BASE		(APB_IO_BASE+0x1000)
+
+/*
+ * interrupt controller is the first thing we put in, to make
+ * the assembly code for the irq detection easier
+ */
+#define W90X900_VA_IRQ		W90X900_ADDR(0x00000000)
+#define W90X900_PA_IRQ		(0xB8002000)
+#define W90X900_SZ_IRQ		SZ_4K
+
+#define W90X900_VA_GCR		W90X900_ADDR(0x08002000)
+#define W90X900_PA_GCR		(0xB0000000)
+#define W90X900_SZ_GCR		SZ_4K
+
+/* Clock and Power management */
+#define W90X900_VA_CLKPWR	(W90X900_VA_GCR+0x200)
+#define W90X900_PA_CLKPWR	(0xB0000200)
+#define W90X900_SZ_CLKPWR	SZ_4K
+
+/* EBI management */
+#define W90X900_VA_EBI		W90X900_ADDR(0x00001000)
+#define W90X900_PA_EBI		(0xB0001000)
+#define W90X900_SZ_EBI		SZ_4K
+
+/* UARTs */
+#define W90X900_VA_UART		W90X900_ADDR(0x08000000)
+#define W90X900_PA_UART		(0xB8000000)
+#define W90X900_SZ_UART		SZ_4K
+
+/* Timers */
+#define W90X900_VA_TIMER	W90X900_ADDR(0x08001000)
+#define W90X900_PA_TIMER	(0xB8001000)
+#define W90X900_SZ_TIMER	SZ_4K
+
+/* GPIO ports */
+#define W90X900_VA_GPIO		W90X900_ADDR(0x08003000)
+#define W90X900_PA_GPIO		(0xB8003000)
+#define W90X900_SZ_GPIO		SZ_4K
+
+/* GDMA control */
+#define W90X900_VA_GDMA		W90X900_ADDR(0x00004000)
+#define W90X900_PA_GDMA		(0xB0004000)
+#define W90X900_SZ_GDMA		SZ_4K
+
+/* USB host controller*/
+#define W90X900_VA_USBEHCIHOST	W90X900_ADDR(0x00005000)
+#define W90X900_PA_USBEHCIHOST	(0xB0005000)
+#define W90X900_SZ_USBEHCIHOST	SZ_4K
+
+#define W90X900_VA_USBOHCIHOST	W90X900_ADDR(0x00007000)
+#define W90X900_PA_USBOHCIHOST	(0xB0007000)
+#define W90X900_SZ_USBOHCIHOST	SZ_4K
+
+/* I2C hardware controller */
+#define W90X900_VA_I2C		W90X900_ADDR(0x08006000)
+#define W90X900_PA_I2C		(0xB8006000)
+#define W90X900_SZ_I2C		SZ_4K
+
+/* Keypad Interface*/
+#define W90X900_VA_KPI		W90X900_ADDR(0x08008000)
+#define W90X900_PA_KPI		(0xB8008000)
+#define W90X900_SZ_KPI		SZ_4K
+
+/* Smart card host*/
+#define W90X900_VA_SC		W90X900_ADDR(0x08005000)
+#define W90X900_PA_SC		(0xB8005000)
+#define W90X900_SZ_SC		SZ_4K
+
+/* LCD controller*/
+#define W90X900_VA_LCD		W90X900_ADDR(0x00008000)
+#define W90X900_PA_LCD		(0xB0008000)
+#define W90X900_SZ_LCD		SZ_4K
+
+/* 2D controller*/
+#define W90X900_VA_GE		W90X900_ADDR(0x0000B000)
+#define W90X900_PA_GE		(0xB000B000)
+#define W90X900_SZ_GE		SZ_4K
+
+/* ATAPI */
+#define W90X900_VA_ATAPI	W90X900_ADDR(0x0000A000)
+#define W90X900_PA_ATAPI	(0xB000A000)
+#define W90X900_SZ_ATAPI	SZ_4K
+
+/* ADC */
+#define W90X900_VA_ADC		W90X900_ADDR(0x0800A000)
+#define W90X900_PA_ADC		(0xB800A000)
+#define W90X900_SZ_ADC		SZ_4K
+
+/* PS2 Interface*/
+#define W90X900_VA_PS2		W90X900_ADDR(0x08009000)
+#define W90X900_PA_PS2		(0xB8009000)
+#define W90X900_SZ_PS2		SZ_4K
+
+/* RTC */
+#define W90X900_VA_RTC		W90X900_ADDR(0x08004000)
+#define W90X900_PA_RTC		(0xB8004000)
+#define W90X900_SZ_RTC		SZ_4K
+
+/* Pulse Width Modulation(PWM) Registers */
+#define W90X900_VA_PWM		W90X900_ADDR(0x08007000)
+#define W90X900_PA_PWM		(0xB8007000)
+#define W90X900_SZ_PWM		SZ_4K
+
+/* Audio Controller controller */
+#define W90X900_VA_ACTL		W90X900_ADDR(0x00009000)
+#define W90X900_PA_ACTL		(0xB0009000)
+#define W90X900_SZ_ACTL		SZ_4K
+
+/* DMA controller */
+#define W90X900_VA_DMA		W90X900_ADDR(0x0000c000)
+#define W90X900_PA_DMA		(0xB000c000)
+#define W90X900_SZ_DMA		SZ_4K
+
+/* FMI controller */
+#define W90X900_VA_FMI		W90X900_ADDR(0x0000d000)
+#define W90X900_PA_FMI		(0xB000d000)
+#define W90X900_SZ_FMI		SZ_4K
+
+/* USB Device port */
+#define W90X900_VA_USBDEV	W90X900_ADDR(0x00006000)
+#define W90X900_PA_USBDEV	(0xB0006000)
+#define W90X900_SZ_USBDEV	SZ_4K
+
+/* External MAC control*/
+#define W90X900_VA_EMC		W90X900_ADDR(0x00003000)
+#define W90X900_PA_EMC		(0xB0003000)
+#define W90X900_SZ_EMC		SZ_4K
+
+#endif /* __ASM_ARCH_MAP_H */

arch/arm/mach-w90x900/include/mach/mfp.h

@@ -0,0 +1,25 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/mfp.h
+ *
+ * Copyright (c) 2010 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/map.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_MFP_H
+#define __ASM_ARCH_MFP_H
+
+extern void mfp_set_groupf(struct device *dev);
+extern void mfp_set_groupc(struct device *dev);
+extern void mfp_set_groupi(struct device *dev);
+extern void mfp_set_groupg(struct device *dev, const char *subname);
+extern void mfp_set_groupd(struct device *dev, const char *subname);
+
+#endif /* __ASM_ARCH_MFP_H */

arch/arm/mach-w90x900/include/mach/regs-clock.h

@@ -0,0 +1,53 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-clock.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_REGS_CLOCK_H
+#define __ASM_ARCH_REGS_CLOCK_H
+
+/* Clock Control Registers  */
+#define CLK_BA		W90X900_VA_CLKPWR
+#define REG_CLKEN	(CLK_BA + 0x00)
+#define REG_CLKSEL	(CLK_BA + 0x04)
+#define REG_CLKDIV	(CLK_BA + 0x08)
+#define REG_PLLCON0	(CLK_BA + 0x0C)
+#define REG_PLLCON1	(CLK_BA + 0x10)
+#define REG_PMCON	(CLK_BA + 0x14)
+#define REG_IRQWAKECON	(CLK_BA + 0x18)
+#define REG_IRQWAKEFLAG	(CLK_BA + 0x1C)
+#define REG_IPSRST	(CLK_BA + 0x20)
+#define REG_CLKEN1	(CLK_BA + 0x24)
+#define REG_CLKDIV1	(CLK_BA + 0x28)
+
+/* Define PLL freq setting */
+#define PLL_DISABLE		0x12B63
+#define	PLL_66MHZ		0x2B63
+#define	PLL_100MHZ		0x4F64
+#define PLL_120MHZ		0x4F63
+#define	PLL_166MHZ		0x4124
+#define	PLL_200MHZ		0x4F24
+
+/* Define AHB:CPUFREQ ratio */
+#define	AHB_CPUCLK_1_1		0x00
+#define	AHB_CPUCLK_1_2		0x01
+#define	AHB_CPUCLK_1_4		0x02
+#define	AHB_CPUCLK_1_8		0x03
+
+/* Define APB:AHB ratio */
+#define APB_AHB_1_2		0x01
+#define APB_AHB_1_4		0x02
+#define APB_AHB_1_8		0x03
+
+/* Define clock skew */
+#define DEFAULTSKEW		0x48
+
+#endif /*  __ASM_ARCH_REGS_CLOCK_H */

arch/arm/mach-w90x900/include/mach/regs-irq.h

@@ -0,0 +1,51 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-irq.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/regs-irq.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef ___ASM_ARCH_REGS_IRQ_H
+#define ___ASM_ARCH_REGS_IRQ_H
+
+/* Advance Interrupt Controller (AIC) Registers */
+
+#define AIC_BA    		W90X900_VA_IRQ
+
+#define REG_AIC_IRQSC		(AIC_BA+0x80)
+#define REG_AIC_GEN		(AIC_BA+0x84)
+#define REG_AIC_GASR		(AIC_BA+0x88)
+#define REG_AIC_GSCR		(AIC_BA+0x8C)
+#define REG_AIC_IRSR		(AIC_BA+0x100)
+#define REG_AIC_IASR		(AIC_BA+0x104)
+#define REG_AIC_ISR		(AIC_BA+0x108)
+#define REG_AIC_IPER		(AIC_BA+0x10C)
+#define REG_AIC_ISNR		(AIC_BA+0x110)
+#define REG_AIC_IMR		(AIC_BA+0x114)
+#define REG_AIC_OISR		(AIC_BA+0x118)
+#define REG_AIC_MECR		(AIC_BA+0x120)
+#define REG_AIC_MDCR		(AIC_BA+0x124)
+#define REG_AIC_SSCR		(AIC_BA+0x128)
+#define REG_AIC_SCCR		(AIC_BA+0x12C)
+#define REG_AIC_EOSCR		(AIC_BA+0x130)
+#define AIC_IPER		(0x10C)
+#define AIC_ISNR		(0x110)
+
+/*16-18 bits of REG_AIC_GEN define irq(2-4) group*/
+
+#define TIMER2_IRQ		(1 << 16)
+#define TIMER3_IRQ		(1 << 17)
+#define TIMER4_IRQ		(1 << 18)
+#define TIME_GROUP_IRQ		(TIMER2_IRQ|TIMER3_IRQ|TIMER4_IRQ)
+
+#endif /* ___ASM_ARCH_REGS_IRQ_H */

arch/arm/mach-w90x900/include/mach/regs-ldm.h

@@ -0,0 +1,253 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-serial.h
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ *  Description:
+ *     Nuvoton Display, LCM Register list
+ *  Author:  Wang Qiang (rurality.linux@gmail.com) 2009/12/11
+ *
+ */
+
+
+#ifndef __ASM_ARM_W90X900_REGS_LDM_H
+#define __ASM_ARM_W90X900_REGS_LDM_H
+
+#include <mach/map.h>
+
+/* Display Controller Control/Status Register */
+#define REG_LCM_DCCS			(0x00)
+
+#define LCM_DCCS_ENG_RST		(1 << 0)
+#define LCM_DCCS_VA_EN			(1 << 1)
+#define LCM_DCCS_OSD_EN			(1 << 2)
+#define LCM_DCCS_DISP_OUT_EN		(1 << 3)
+#define LCM_DCCS_DISP_INT_EN		(1 << 4)
+#define LCM_DCCS_CMD_ON			(1 << 5)
+#define LCM_DCCS_FIELD_INTR		(1 << 6)
+#define LCM_DCCS_SINGLE			(1 << 7)
+
+enum LCM_DCCS_VA_SRC {
+	LCM_DCCS_VA_SRC_YUV422		= (0 << 8),
+	LCM_DCCS_VA_SRC_YCBCR422	= (1 << 8),
+	LCM_DCCS_VA_SRC_RGB888		= (2 << 8),
+	LCM_DCCS_VA_SRC_RGB666		= (3 << 8),
+	LCM_DCCS_VA_SRC_RGB565		= (4 << 8),
+	LCM_DCCS_VA_SRC_RGB444LOW	= (5 << 8),
+	LCM_DCCS_VA_SRC_RGB444HIGH 	= (7 << 8)
+};
+
+
+/* Display Device Control Register */
+#define REG_LCM_DEV_CTRL		(0x04)
+
+enum LCM_DEV_CTRL_SWAP_YCbCr {
+	LCM_DEV_CTRL_SWAP_UYVY		= (0 << 1),
+	LCM_DEV_CTRL_SWAP_YUYV		= (1 << 1),
+	LCM_DEV_CTRL_SWAP_VYUY		= (2 << 1),
+	LCM_DEV_CTRL_SWAP_YVYU		= (3 << 1)
+};
+
+enum LCM_DEV_CTRL_RGB_SHIFT {
+	LCM_DEV_CTRL_RGB_SHIFT_NOT 	= (0 << 3),
+	LCM_DEV_CTRL_RGB_SHIFT_ONECYCLE = (1 << 3),
+	LCM_DEV_CTRL_RGB_SHIFT_TWOCYCLE = (2 << 3),
+	LCM_DEV_CTRL_RGB_SHIFT_NOT_DEF	= (3 << 3)
+};
+
+enum LCM_DEV_CTRL_DEVICE {
+	LCM_DEV_CTRL_DEVICE_YUV422	= (0 << 5),
+	LCM_DEV_CTRL_DEVICE_YUV444	= (1 << 5),
+	LCM_DEV_CTRL_DEVICE_UNIPAC	= (4 << 5),
+	LCM_DEV_CTRL_DEVICE_SEIKO_EPSON	= (5 << 5),
+	LCM_DEV_CTRL_DEVICE_HIGH_COLOR	= (6 << 5),
+	LCM_DEV_CTRL_DEVICE_MPU		= (7 << 5)
+};
+
+#define LCM_DEV_CTRL_LCD_DDA		(8)
+#define LCM_DEV_CTRL_YUV2CCIR		(16)
+
+enum LCM_DEV_CTRL_LCD_SEL {
+	LCM_DEV_CTRL_LCD_SEL_RGB_GBR	= (0 << 17),
+	LCM_DEV_CTRL_LCD_SEL_BGR_RBG	= (1 << 17),
+	LCM_DEV_CTRL_LCD_SEL_GBR_RGB	= (2 << 17),
+	LCM_DEV_CTRL_LCD_SEL_RBG_BGR	= (3 << 17)
+};
+
+enum LCM_DEV_CTRL_FAL_D {
+	LCM_DEV_CTRL_FAL_D_FALLING	= (0 << 19),
+	LCM_DEV_CTRL_FAL_D_RISING	= (1 << 19),
+};
+
+enum LCM_DEV_CTRL_H_POL {
+	LCM_DEV_CTRL_H_POL_LOW		= (0 << 20),
+	LCM_DEV_CTRL_H_POL_HIGH		= (1 << 20),
+};
+
+enum LCM_DEV_CTRL_V_POL {
+	LCM_DEV_CTRL_V_POL_LOW		= (0 << 21),
+	LCM_DEV_CTRL_V_POL_HIGH		= (1 << 21),
+};
+
+enum LCM_DEV_CTRL_VR_LACE {
+	LCM_DEV_CTRL_VR_LACE_NINTERLACE	= (0 << 22),
+	LCM_DEV_CTRL_VR_LACE_INTERLACE	= (1 << 22),
+};
+
+enum LCM_DEV_CTRL_LACE {
+	LCM_DEV_CTRL_LACE_NINTERLACE	= (0 << 23),
+	LCM_DEV_CTRL_LACE_INTERLACE	= (1 << 23),
+};
+
+enum LCM_DEV_CTRL_RGB_SCALE {
+	LCM_DEV_CTRL_RGB_SCALE_4096 	= (0 << 24),
+	LCM_DEV_CTRL_RGB_SCALE_65536 	= (1 << 24),
+	LCM_DEV_CTRL_RGB_SCALE_262144 	= (2 << 24),
+	LCM_DEV_CTRL_RGB_SCALE_16777216 = (3 << 24),
+};
+
+enum LCM_DEV_CTRL_DBWORD {
+	LCM_DEV_CTRL_DBWORD_HALFWORD	= (0 << 26),
+	LCM_DEV_CTRL_DBWORD_FULLWORD	= (1 << 26),
+};
+
+enum LCM_DEV_CTRL_MPU68 {
+	LCM_DEV_CTRL_MPU68_80_SERIES	= (0 << 27),
+	LCM_DEV_CTRL_MPU68_68_SERIES	= (1 << 27),
+};
+
+enum LCM_DEV_CTRL_DE_POL {
+	LCM_DEV_CTRL_DE_POL_HIGH	= (0 << 28),
+	LCM_DEV_CTRL_DE_POL_LOW		= (1 << 28),
+};
+
+#define LCM_DEV_CTRL_CMD16		(29)
+#define LCM_DEV_CTRL_CM16t18		(30)
+#define LCM_DEV_CTRL_CMD_LOW		(31)
+
+/* MPU-Interface LCD Write Command */
+#define REG_LCM_MPU_CMD			(0x08)
+
+/* Interrupt Control/Status Register */
+#define REG_LCM_INT_CS			(0x0c)
+#define LCM_INT_CS_DISP_F_EN		(1 << 0)
+#define LCM_INT_CS_UNDERRUN_EN   	(1 << 1)
+#define LCM_INT_CS_BUS_ERROR_INT 	(1 << 28)
+#define LCM_INT_CS_UNDERRUN_INT  	(1 << 29)
+#define LCM_INT_CS_DISP_F_STATUS 	(1 << 30)
+#define LCM_INT_CS_DISP_F_INT		(1 << 31)
+
+/* CRTC Display Size Control Register */
+#define REG_LCM_CRTC_SIZE		(0x10)
+#define LCM_CRTC_SIZE_VTTVAL(x)		((x) << 16)
+#define LCM_CRTC_SIZE_HTTVAL(x)		((x) << 0)
+
+/* CRTC Display Enable End */
+#define REG_LCM_CRTC_DEND		(0x14)
+#define LCM_CRTC_DEND_VDENDVAL(x)	((x) << 16)
+#define LCM_CRTC_DEND_HDENDVAL(x)	((x) << 0)
+
+/* CRTC Internal Horizontal Retrace Control Register */
+#define REG_LCM_CRTC_HR			(0x18)
+#define LCM_CRTC_HR_EVAL(x)		((x) << 16)
+#define LCM_CRTC_HR_SVAL(x)		((x) << 0)
+
+/* CRTC Horizontal Sync Control Register */
+#define REG_LCM_CRTC_HSYNC		(0x1C)
+#define LCM_CRTC_HSYNC_SHIFTVAL(x)	((x) << 30)
+#define LCM_CRTC_HSYNC_EVAL(x)		((x) << 16)
+#define LCM_CRTC_HSYNC_SVAL(x)		((x) << 0)
+
+/* CRTC Internal Vertical Retrace Control Register */
+#define REG_LCM_CRTC_VR			(0x20)
+#define LCM_CRTC_VR_EVAL(x)		((x) << 16)
+#define LCM_CRTC_VR_SVAL(x)		((x) << 0)
+
+/* Video Stream Frame Buffer-0 Starting Address */
+#define REG_LCM_VA_BADDR0		(0x24)
+
+/* Video Stream Frame Buffer-1 Starting Address */
+#define REG_LCM_VA_BADDR1		(0x28)
+
+/* Video Stream Frame Buffer Control Register */
+#define REG_LCM_VA_FBCTRL		(0x2C)
+#define LCM_VA_FBCTRL_IO_REGION_HALF	(1 << 28)
+#define LCM_VA_FBCTRL_FIELD_DUAL  	(1 << 29)
+#define LCM_VA_FBCTRL_START_BUF 	(1 << 30)
+#define LCM_VA_FBCTRL_DB_EN		(1 << 31)
+
+/* Video Stream Scaling Control Register */
+#define REG_LCM_VA_SCALE		(0x30)
+#define LCM_VA_SCALE_XCOPY_INTERPOLATION (0 << 15)
+#define LCM_VA_SCALE_XCOPY_DUPLICATION	 (1 << 15)
+
+/* Image Stream Active Window Coordinates */
+#define REG_LCM_VA_WIN			(0x38)
+
+/* Image Stream Stuff Pixel */
+#define REG_LCM_VA_STUFF		(0x3C)
+
+/* OSD Window Starting Coordinates */
+#define REG_LCM_OSD_WINS		(0x40)
+
+/* OSD Window Ending Coordinates */
+#define REG_LCM_OSD_WINE		(0x44)
+
+/* OSD Stream Frame Buffer Starting Address */
+#define REG_LCM_OSD_BADDR		(0x48)
+
+/* OSD Stream Frame Buffer Control Register */
+#define REG_LCM_OSD_FBCTRL		(0x4c)
+
+/* OSD Overlay Control Register */
+#define REG_LCM_OSD_OVERLAY		(0x50)
+
+/* OSD Overlay Color-Key Pattern Register */
+#define REG_LCM_OSD_CKEY		(0x54)
+
+/* OSD Overlay Color-Key Mask Register */
+#define REG_LCM_OSD_CMASK		(0x58)
+
+/* OSD Window Skip1 Register */
+#define REG_LCM_OSD_SKIP1		(0x5C)
+
+/* OSD Window Skip2 Register */
+#define REG_LCM_OSD_SKIP2		(0x60)
+
+/* OSD horizontal up scaling control register */
+#define REG_LCM_OSD_SCALE		(0x64)
+
+/* MPU Vsync control register */
+#define REG_LCM_MPU_VSYNC		(0x68)
+
+/* Hardware cursor control Register */
+#define REG_LCM_HC_CTRL			(0x6C)
+
+/* Hardware cursot tip point potison on va picture */
+#define REG_LCM_HC_POS			(0x70)
+
+/* Hardware Cursor Window Buffer Control Register */
+#define REG_LCM_HC_WBCTRL		(0x74)
+
+/* Hardware cursor memory base address register */
+#define REG_LCM_HC_BADDR		(0x78)
+
+/* Hardware cursor color ram register mapped to bpp = 0 */
+#define REG_LCM_HC_COLOR0		(0x7C)
+
+/* Hardware cursor color ram register mapped to bpp = 1 */
+#define REG_LCM_HC_COLOR1		(0x80)
+
+/* Hardware cursor color ram register mapped to bpp = 2 */
+#define REG_LCM_HC_COLOR2		(0x84)
+
+/* Hardware cursor color ram register mapped to bpp = 3 */
+#define REG_LCM_HC_COLOR3		(0x88)
+
+#endif /* __ASM_ARM_W90X900_REGS_LDM_H */

arch/arm/mach-w90x900/include/mach/regs-serial.h

@@ -0,0 +1,59 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-serial.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/regs-serial.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __ASM_ARM_REGS_SERIAL_H
+#define __ASM_ARM_REGS_SERIAL_H
+
+#define UART0_BA	W90X900_VA_UART
+#define UART1_BA	(W90X900_VA_UART+0x100)
+#define UART2_BA	(W90X900_VA_UART+0x200)
+#define UART3_BA	(W90X900_VA_UART+0x300)
+#define UART4_BA	(W90X900_VA_UART+0x400)
+
+#define UART0_PA	W90X900_PA_UART
+#define UART1_PA	(W90X900_PA_UART+0x100)
+#define UART2_PA	(W90X900_PA_UART+0x200)
+#define UART3_PA	(W90X900_PA_UART+0x300)
+#define UART4_PA	(W90X900_PA_UART+0x400)
+
+#ifndef __ASSEMBLY__
+
+struct w90x900_uart_clksrc {
+	const char	*name;
+	unsigned int	divisor;
+	unsigned int	min_baud;
+	unsigned int	max_baud;
+};
+
+struct w90x900_uartcfg {
+	unsigned char	hwport;
+	unsigned char	unused;
+	unsigned short	flags;
+	unsigned long	uart_flags;
+
+	unsigned long	ucon;
+	unsigned long	ulcon;
+	unsigned long	ufcon;
+
+	struct w90x900_uart_clksrc *clocks;
+	unsigned int	clocks_size;
+};
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_ARM_REGS_SERIAL_H */
+

arch/arm/mach-w90x900/include/mach/uncompress.h

@@ -0,0 +1,48 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/uncompress.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/uncompress.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __ASM_ARCH_UNCOMPRESS_H
+#define __ASM_ARCH_UNCOMPRESS_H
+
+/* Defines for UART registers */
+
+#include <mach/regs-serial.h>
+#include <mach/map.h>
+#include <linux/serial_reg.h>
+
+#define TX_DONE	(UART_LSR_TEMT | UART_LSR_THRE)
+static volatile u32 * const uart_base = (u32 *)UART0_PA;
+
+static inline void putc(int ch)
+{
+	/* Check THRE and TEMT bits before we transmit the character.
+	 */
+	while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE)
+		barrier();
+
+	*uart_base = ch;
+}
+
+static inline void flush(void)
+{
+}
+
+static void arch_decomp_setup(void)
+{
+}
+
+#endif/* __ASM_W90X900_UNCOMPRESS_H */

arch/arm/mach-w90x900/irq.c

@@ -0,0 +1,216 @@
+/*
+ * linux/arch/arm/mach-w90x900/irq.c
+ *
+ * based on linux/arch/arm/plat-s3c24xx/irq.c by Ben Dooks
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/ptrace.h>
+#include <linux/device.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/regs-irq.h>
+
+#include "nuc9xx.h"
+
+struct group_irq {
+	unsigned long		gpen;
+	unsigned int		enabled;
+	void			(*enable)(struct group_irq *, int enable);
+};
+
+static DEFINE_SPINLOCK(groupirq_lock);
+
+#define DEFINE_GROUP(_name, _ctrlbit, _num)				\
+struct group_irq group_##_name = {					\
+		.enable		= nuc900_group_enable,			\
+		.gpen		= ((1 << _num) - 1) << _ctrlbit,	\
+	}
+
+static void nuc900_group_enable(struct group_irq *gpirq, int enable);
+
+static DEFINE_GROUP(nirq0, 0, 4);
+static DEFINE_GROUP(nirq1, 4, 4);
+static DEFINE_GROUP(usbh, 8, 2);
+static DEFINE_GROUP(ottimer, 16, 3);
+static DEFINE_GROUP(gdma, 20, 2);
+static DEFINE_GROUP(sc, 24, 2);
+static DEFINE_GROUP(i2c, 26, 2);
+static DEFINE_GROUP(ps2, 28, 2);
+
+static int group_irq_enable(struct group_irq *group_irq)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&groupirq_lock, flags);
+	if (group_irq->enabled++ == 0)
+		(group_irq->enable)(group_irq, 1);
+	spin_unlock_irqrestore(&groupirq_lock, flags);
+
+	return 0;
+}
+
+static void group_irq_disable(struct group_irq *group_irq)
+{
+	unsigned long flags;
+
+	WARN_ON(group_irq->enabled == 0);
+
+	spin_lock_irqsave(&groupirq_lock, flags);
+	if (--group_irq->enabled == 0)
+		(group_irq->enable)(group_irq, 0);
+	spin_unlock_irqrestore(&groupirq_lock, flags);
+}
+
+static void nuc900_group_enable(struct group_irq *gpirq, int enable)
+{
+	unsigned int groupen = gpirq->gpen;
+	unsigned long regval;
+
+	regval = __raw_readl(REG_AIC_GEN);
+
+	if (enable)
+		regval |= groupen;
+	else
+		regval &= ~groupen;
+
+	__raw_writel(regval, REG_AIC_GEN);
+}
+
+static void nuc900_irq_mask(struct irq_data *d)
+{
+	struct group_irq *group_irq;
+
+	group_irq = NULL;
+
+	__raw_writel(1 << d->irq, REG_AIC_MDCR);
+
+	switch (d->irq) {
+	case IRQ_GROUP0:
+		group_irq = &group_nirq0;
+		break;
+
+	case IRQ_GROUP1:
+		group_irq = &group_nirq1;
+		break;
+
+	case IRQ_USBH:
+		group_irq = &group_usbh;
+		break;
+
+	case IRQ_T_INT_GROUP:
+		group_irq = &group_ottimer;
+		break;
+
+	case IRQ_GDMAGROUP:
+		group_irq = &group_gdma;
+		break;
+
+	case IRQ_SCGROUP:
+		group_irq = &group_sc;
+		break;
+
+	case IRQ_I2CGROUP:
+		group_irq = &group_i2c;
+		break;
+
+	case IRQ_P2SGROUP:
+		group_irq = &group_ps2;
+		break;
+	}
+
+	if (group_irq)
+		group_irq_disable(group_irq);
+}
+
+/*
+ * By the w90p910 spec,any irq,only write 1
+ * to REG_AIC_EOSCR for ACK
+ */
+
+static void nuc900_irq_ack(struct irq_data *d)
+{
+	__raw_writel(0x01, REG_AIC_EOSCR);
+}
+
+static void nuc900_irq_unmask(struct irq_data *d)
+{
+	struct group_irq *group_irq;
+
+	group_irq = NULL;
+
+	__raw_writel(1 << d->irq, REG_AIC_MECR);
+
+	switch (d->irq) {
+	case IRQ_GROUP0:
+		group_irq = &group_nirq0;
+		break;
+
+	case IRQ_GROUP1:
+		group_irq = &group_nirq1;
+		break;
+
+	case IRQ_USBH:
+		group_irq = &group_usbh;
+		break;
+
+	case IRQ_T_INT_GROUP:
+		group_irq = &group_ottimer;
+		break;
+
+	case IRQ_GDMAGROUP:
+		group_irq = &group_gdma;
+		break;
+
+	case IRQ_SCGROUP:
+		group_irq = &group_sc;
+		break;
+
+	case IRQ_I2CGROUP:
+		group_irq = &group_i2c;
+		break;
+
+	case IRQ_P2SGROUP:
+		group_irq = &group_ps2;
+		break;
+	}
+
+	if (group_irq)
+		group_irq_enable(group_irq);
+}
+
+static struct irq_chip nuc900_irq_chip = {
+	.irq_ack	= nuc900_irq_ack,
+	.irq_mask	= nuc900_irq_mask,
+	.irq_unmask	= nuc900_irq_unmask,
+};
+
+void __init nuc900_init_irq(void)
+{
+	int irqno;
+
+	__raw_writel(0xFFFFFFFE, REG_AIC_MDCR);
+
+	for (irqno = IRQ_WDT; irqno <= IRQ_ADC; irqno++) {
+		irq_set_chip_and_handler(irqno, &nuc900_irq_chip,
+					 handle_level_irq);
+		irq_clear_status_flags(irqno, IRQ_NOREQUEST);
+	}
+}

arch/arm/mach-w90x900/mach-nuc910evb.c

@@ -0,0 +1,42 @@
+/*
+ * linux/arch/arm/mach-w90x900/mach-nuc910evb.c
+ *
+ * Based on mach-s3c2410/mach-smdk2410.c by Jonas Dietsche
+ *
+ * Copyright (C) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach-types.h>
+#include <mach/map.h>
+
+#include "nuc910.h"
+
+static void __init nuc910evb_map_io(void)
+{
+	nuc910_map_io();
+	nuc910_init_clocks();
+}
+
+static void __init nuc910evb_init(void)
+{
+	nuc910_board_init();
+}
+
+MACHINE_START(W90P910EVB, "W90P910EVB")
+	/* Maintainer: Wan ZongShun */
+	.map_io		= nuc910evb_map_io,
+	.init_irq	= nuc900_init_irq,
+	.init_machine	= nuc910evb_init,
+	.init_time	= nuc900_timer_init,
+	.restart	= nuc9xx_restart,
+MACHINE_END

arch/arm/mach-w90x900/mach-nuc950evb.c

@@ -0,0 +1,45 @@
+/*
+ * linux/arch/arm/mach-w90x900/mach-nuc950evb.c
+ *
+ * Based on mach-s3c2410/mach-smdk2410.c by Jonas Dietsche
+ *
+ * Copyright (C) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation;version 2 of the License.
+ *   history:
+ *     Wang Qiang (rurality.linux@gmail.com) add LCD support
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach-types.h>
+#include <mach/map.h>
+#include <linux/platform_data/video-nuc900fb.h>
+
+#include "nuc950.h"
+
+static void __init nuc950evb_map_io(void)
+{
+	nuc950_map_io();
+	nuc950_init_clocks();
+}
+
+static void __init nuc950evb_init(void)
+{
+	nuc950_board_init();
+}
+
+MACHINE_START(W90P950EVB, "W90P950EVB")
+	/* Maintainer: Wan ZongShun */
+	.map_io		= nuc950evb_map_io,
+	.init_irq	= nuc900_init_irq,
+	.init_machine	= nuc950evb_init,
+	.init_time	= nuc900_timer_init,
+	.restart	= nuc9xx_restart,
+MACHINE_END

arch/arm/mach-w90x900/mach-nuc960evb.c

@@ -0,0 +1,42 @@
+/*
+ * linux/arch/arm/mach-w90x900/mach-nuc960evb.c
+ *
+ * Based on mach-s3c2410/mach-smdk2410.c by Jonas Dietsche
+ *
+ * Copyright (C) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach-types.h>
+#include <mach/map.h>
+
+#include "nuc960.h"
+
+static void __init nuc960evb_map_io(void)
+{
+	nuc960_map_io();
+	nuc960_init_clocks();
+}
+
+static void __init nuc960evb_init(void)
+{
+	nuc960_board_init();
+}
+
+MACHINE_START(W90N960EVB, "W90N960EVB")
+	/* Maintainer: Wan ZongShun */
+	.map_io		= nuc960evb_map_io,
+	.init_irq	= nuc900_init_irq,
+	.init_machine	= nuc960evb_init,
+	.init_time	= nuc900_timer_init,
+	.restart	= nuc9xx_restart,
+MACHINE_END

arch/arm/mach-w90x900/mfp.c

@@ -0,0 +1,200 @@
+/*
+ * linux/arch/arm/mach-w90x900/mfp.c
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/string.h>
+#include <linux/clk.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+
+#define REG_MFSEL	(W90X900_VA_GCR + 0xC)
+
+#define GPSELF		(0x01 << 1)
+#define GPSELC		(0x03 << 2)
+#define GPSELD		(0x0f << 4)
+
+#define GPSELEI0	(0x01 << 26)
+#define GPSELEI1	(0x01 << 27)
+
+#define GPIOG0TO1	(0x03 << 14)
+#define GPIOG2TO3	(0x03 << 16)
+#define GPIOG22TO23	(0x03 << 22)
+#define GPIOG18TO20	(0x07 << 18)
+
+#define ENSPI		(0x0a << 14)
+#define ENI2C0		(0x01 << 14)
+#define ENI2C1		(0x01 << 16)
+#define ENAC97		(0x02 << 22)
+#define ENSD1		(0x02 << 18)
+#define ENSD0		(0x0a << 4)
+#define ENKPI		(0x02 << 2)
+#define ENNAND		(0x01 << 2)
+
+static DEFINE_MUTEX(mfp_mutex);
+
+void mfp_set_groupf(struct device *dev)
+{
+	unsigned long mfpen;
+	const char *dev_id;
+
+	BUG_ON(!dev);
+
+	mutex_lock(&mfp_mutex);
+
+	dev_id = dev_name(dev);
+
+	mfpen = __raw_readl(REG_MFSEL);
+
+	if (strcmp(dev_id, "nuc900-emc") == 0)
+		mfpen |= GPSELF;/*enable mac*/
+	else
+		mfpen &= ~GPSELF;/*GPIOF[9:0]*/
+
+	__raw_writel(mfpen, REG_MFSEL);
+
+	mutex_unlock(&mfp_mutex);
+}
+EXPORT_SYMBOL(mfp_set_groupf);
+
+void mfp_set_groupc(struct device *dev)
+{
+	unsigned long mfpen;
+	const char *dev_id;
+
+	BUG_ON(!dev);
+
+	mutex_lock(&mfp_mutex);
+
+	dev_id = dev_name(dev);
+
+	mfpen = __raw_readl(REG_MFSEL);
+
+	if (strcmp(dev_id, "nuc900-lcd") == 0)
+		mfpen |= GPSELC;/*enable lcd*/
+	else if (strcmp(dev_id, "nuc900-kpi") == 0) {
+		mfpen &= (~GPSELC);/*enable kpi*/
+		mfpen |= ENKPI;
+	} else if (strcmp(dev_id, "nuc900-nand") == 0) {
+		mfpen &= (~GPSELC);/*enable nand*/
+		mfpen |= ENNAND;
+	} else
+		mfpen &= (~GPSELC);/*GPIOC[14:0]*/
+
+	__raw_writel(mfpen, REG_MFSEL);
+
+	mutex_unlock(&mfp_mutex);
+}
+EXPORT_SYMBOL(mfp_set_groupc);
+
+void mfp_set_groupi(struct device *dev)
+{
+	unsigned long mfpen;
+	const char *dev_id;
+
+	BUG_ON(!dev);
+
+	mutex_lock(&mfp_mutex);
+
+	dev_id = dev_name(dev);
+
+	mfpen = __raw_readl(REG_MFSEL);
+
+	mfpen &= ~GPSELEI1;/*default gpio16*/
+
+	if (strcmp(dev_id, "nuc900-wdog") == 0)
+		mfpen |= GPSELEI1;/*enable wdog*/
+	else if (strcmp(dev_id, "nuc900-atapi") == 0)
+		mfpen |= GPSELEI0;/*enable atapi*/
+	else if (strcmp(dev_id, "nuc900-keypad") == 0)
+		mfpen &= ~GPSELEI0;/*enable keypad*/
+
+	__raw_writel(mfpen, REG_MFSEL);
+
+	mutex_unlock(&mfp_mutex);
+}
+EXPORT_SYMBOL(mfp_set_groupi);
+
+void mfp_set_groupg(struct device *dev, const char *subname)
+{
+	unsigned long mfpen;
+	const char *dev_id;
+
+	BUG_ON((!dev) && (!subname));
+
+	mutex_lock(&mfp_mutex);
+
+	if (subname != NULL)
+		dev_id = subname;
+	else
+		dev_id = dev_name(dev);
+
+	mfpen = __raw_readl(REG_MFSEL);
+
+	if (strcmp(dev_id, "nuc900-spi") == 0) {
+		mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
+		mfpen |= ENSPI;/*enable spi*/
+	} else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
+		mfpen &= ~(GPIOG0TO1);
+		mfpen |= ENI2C0;/*enable i2c0*/
+	} else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
+		mfpen &= ~(GPIOG2TO3);
+		mfpen |= ENI2C1;/*enable i2c1*/
+	} else if (strcmp(dev_id, "nuc900-ac97") == 0) {
+		mfpen &= ~(GPIOG22TO23);
+		mfpen |= ENAC97;/*enable AC97*/
+	} else if (strcmp(dev_id, "nuc900-mmc-port1") == 0) {
+		mfpen &= ~(GPIOG18TO20);
+		mfpen |= (ENSD1 | 0x01);/*enable sd1*/
+	} else {
+		mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
+	}
+
+	__raw_writel(mfpen, REG_MFSEL);
+
+	mutex_unlock(&mfp_mutex);
+}
+EXPORT_SYMBOL(mfp_set_groupg);
+
+void mfp_set_groupd(struct device *dev, const char *subname)
+{
+	unsigned long mfpen;
+	const char *dev_id;
+
+	BUG_ON((!dev) && (!subname));
+
+	mutex_lock(&mfp_mutex);
+
+	if (subname != NULL)
+		dev_id = subname;
+	else
+		dev_id = dev_name(dev);
+
+	mfpen = __raw_readl(REG_MFSEL);
+
+	if (strcmp(dev_id, "nuc900-mmc-port0") == 0) {
+		mfpen &= ~GPSELD;/*enable sd0*/
+		mfpen |= ENSD0;
+	} else
+		mfpen &= (~GPSELD);
+
+	__raw_writel(mfpen, REG_MFSEL);
+
+	mutex_unlock(&mfp_mutex);
+}
+EXPORT_SYMBOL(mfp_set_groupd);

arch/arm/mach-w90x900/nuc910.c

@@ -0,0 +1,62 @@
+/*
+ * linux/arch/arm/mach-w90x900/nuc910.c
+ *
+ * Based on linux/arch/arm/plat-s3c24xx/s3c244x.c by Ben Dooks
+ *
+ * Copyright (c) 2009 Nuvoton corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * NUC910 cpu support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach/map.h>
+#include <mach/hardware.h>
+#include "cpu.h"
+#include "clock.h"
+
+/* define specific CPU platform device */
+
+static struct platform_device *nuc910_dev[] __initdata = {
+	&nuc900_device_ts,
+	&nuc900_device_rtc,
+	&nuc900_device_lcd,
+	&nuc900_device_kpi,
+};
+
+/* define specific CPU platform io map */
+
+static struct map_desc nuc910evb_iodesc[] __initdata = {
+	IODESC_ENT(USBEHCIHOST),
+	IODESC_ENT(USBOHCIHOST),
+	IODESC_ENT(KPI),
+	IODESC_ENT(USBDEV),
+	IODESC_ENT(ADC),
+};
+
+/*Init NUC910 evb io*/
+
+void __init nuc910_map_io(void)
+{
+	nuc900_map_io(nuc910evb_iodesc, ARRAY_SIZE(nuc910evb_iodesc));
+}
+
+/*Init NUC910 clock*/
+
+void __init nuc910_init_clocks(void)
+{
+	nuc900_init_clocks();
+}
+
+/*Init NUC910 board info*/
+
+void __init nuc910_board_init(void)
+{
+	nuc900_board_init(nuc910_dev, ARRAY_SIZE(nuc910_dev));
+}

arch/arm/mach-w90x900/nuc910.h

@@ -0,0 +1,21 @@
+/*
+ * arch/arm/mach-w90x900/nuc910.h
+ *
+ * Copyright (c) 2008 Nuvoton corporation
+ *
+ * Header file for NUC900 CPU support
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include "nuc9xx.h"
+
+/* extern file from nuc910.c */
+
+extern void nuc910_board_init(void);
+extern void nuc910_init_clocks(void);
+extern void nuc910_map_io(void);

arch/arm/mach-w90x900/nuc950.c

@@ -0,0 +1,56 @@
+/*
+ * linux/arch/arm/mach-w90x900/nuc950.c
+ *
+ * Based on linux/arch/arm/plat-s3c24xx/s3c244x.c by Ben Dooks
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * NUC950 cpu support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach/map.h>
+#include <mach/hardware.h>
+
+#include "cpu.h"
+
+/* define specific CPU platform device */
+
+static struct platform_device *nuc950_dev[] __initdata = {
+	&nuc900_device_kpi,
+	&nuc900_device_fmi,
+	&nuc900_device_lcd,
+};
+
+/* define specific CPU platform io map */
+
+static struct map_desc nuc950evb_iodesc[] __initdata = {
+};
+
+/*Init NUC950 evb io*/
+
+void __init nuc950_map_io(void)
+{
+	nuc900_map_io(nuc950evb_iodesc, ARRAY_SIZE(nuc950evb_iodesc));
+}
+
+/*Init NUC950 clock*/
+
+void __init nuc950_init_clocks(void)
+{
+	nuc900_init_clocks();
+}
+
+/*Init NUC950 board info*/
+
+void __init nuc950_board_init(void)
+{
+	nuc900_board_init(nuc950_dev, ARRAY_SIZE(nuc950_dev));
+}

arch/arm/mach-w90x900/nuc950.h

@@ -0,0 +1,21 @@
+/*
+ * arch/arm/mach-w90x900/nuc950.h
+ *
+ * Copyright (c) 2008 Nuvoton corporation
+ *
+ * Header file for NUC900 CPU support
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include "nuc9xx.h"
+
+/* extern file from nuc950.c */
+
+extern void nuc950_board_init(void);
+extern void nuc950_init_clocks(void);
+extern void nuc950_map_io(void);

arch/arm/mach-w90x900/nuc960.c

@@ -0,0 +1,54 @@
+/*
+ * linux/arch/arm/mach-w90x900/nuc960.c
+ *
+ * Based on linux/arch/arm/plat-s3c24xx/s3c244x.c by Ben Dooks
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * NUC960 cpu support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <asm/mach/map.h>
+#include <mach/hardware.h>
+#include "cpu.h"
+
+/* define specific CPU platform device */
+
+static struct platform_device *nuc960_dev[] __initdata = {
+	&nuc900_device_kpi,
+	&nuc900_device_fmi,
+};
+
+/* define specific CPU platform io map */
+
+static struct map_desc nuc960evb_iodesc[] __initdata = {
+};
+
+/*Init NUC960 evb io*/
+
+void __init nuc960_map_io(void)
+{
+	nuc900_map_io(nuc960evb_iodesc, ARRAY_SIZE(nuc960evb_iodesc));
+}
+
+/*Init NUC960 clock*/
+
+void __init nuc960_init_clocks(void)
+{
+	nuc900_init_clocks();
+}
+
+/*Init NUC960 board info*/
+
+void __init nuc960_board_init(void)
+{
+	nuc900_board_init(nuc960_dev, ARRAY_SIZE(nuc960_dev));
+}

arch/arm/mach-w90x900/nuc960.h

@@ -0,0 +1,21 @@
+/*
+ * arch/arm/mach-w90x900/nuc960.h
+ *
+ * Copyright (c) 2008 Nuvoton corporation
+ *
+ * Header file for NUC900 CPU support
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include "nuc9xx.h"
+
+/* extern file from nuc960.c */
+
+extern void nuc960_board_init(void);
+extern void nuc960_init_clocks(void);
+extern void nuc960_map_io(void);

arch/arm/mach-w90x900/nuc9xx.h

@@ -0,0 +1,26 @@
+/*
+ * arch/arm/mach-w90x900/nuc9xx.h
+ *
+ * Copied from nuc910.h, which had:
+ *
+ * Copyright (c) 2008 Nuvoton corporation
+ *
+ * Header file for NUC900 CPU support
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/reboot.h>
+
+struct map_desc;
+
+/* core initialisation functions */
+
+extern void nuc900_init_irq(void);
+extern void nuc900_timer_init(void);
+extern void nuc9xx_restart(enum reboot_mode, const char *);

arch/arm/mach-w90x900/regs-ebi.h

@@ -0,0 +1,33 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-ebi.h
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_REGS_EBI_H
+#define __ASM_ARCH_REGS_EBI_H
+
+/* EBI Control Registers */
+
+#define EBI_BA		W90X900_VA_EBI
+#define REG_EBICON	(EBI_BA + 0x00)
+#define REG_ROMCON	(EBI_BA + 0x04)
+#define REG_SDCONF0	(EBI_BA + 0x08)
+#define REG_SDCONF1	(EBI_BA + 0x0C)
+#define REG_SDTIME0	(EBI_BA + 0x10)
+#define REG_SDTIME1	(EBI_BA + 0x14)
+#define REG_EXT0CON	(EBI_BA + 0x18)
+#define REG_EXT1CON	(EBI_BA + 0x1C)
+#define REG_EXT2CON	(EBI_BA + 0x20)
+#define REG_EXT3CON	(EBI_BA + 0x24)
+#define REG_EXT4CON	(EBI_BA + 0x28)
+#define REG_CKSKEW	(EBI_BA + 0x2C)
+
+#endif /*  __ASM_ARCH_REGS_EBI_H */

arch/arm/mach-w90x900/regs-gcr.h

@@ -0,0 +1,39 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-gcr.h
+ *
+ * Copyright (c) 2010 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __ASM_ARCH_REGS_GCR_H
+#define __ASM_ARCH_REGS_GCR_H
+
+/* Global control registers */
+
+#define GCR_BA		W90X900_VA_GCR
+#define REG_PDID	(GCR_BA+0x000)
+#define REG_PWRON	(GCR_BA+0x004)
+#define REG_ARBCON	(GCR_BA+0x008)
+#define REG_MFSEL	(GCR_BA+0x00C)
+#define REG_EBIDPE	(GCR_BA+0x010)
+#define REG_LCDDPE	(GCR_BA+0x014)
+#define REG_GPIOCPE	(GCR_BA+0x018)
+#define REG_GPIODPE	(GCR_BA+0x01C)
+#define REG_GPIOEPE	(GCR_BA+0x020)
+#define REG_GPIOFPE	(GCR_BA+0x024)
+#define REG_GPIOGPE	(GCR_BA+0x028)
+#define REG_GPIOHPE	(GCR_BA+0x02C)
+#define REG_GPIOIPE	(GCR_BA+0x030)
+#define REG_GTMP1	(GCR_BA+0x034)
+#define REG_GTMP2	(GCR_BA+0x038)
+#define REG_GTMP3	(GCR_BA+0x03C)
+
+#endif /*  __ASM_ARCH_REGS_GCR_H */

arch/arm/mach-w90x900/regs-timer.h

@@ -0,0 +1,42 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-timer.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * Based on arch/arm/mach-s3c2410/include/mach/regs-timer.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __ASM_ARCH_REGS_TIMER_H
+#define __ASM_ARCH_REGS_TIMER_H
+
+/* Timer Registers */
+
+#define TMR_BA			W90X900_VA_TIMER
+#define REG_TCSR0		(TMR_BA+0x00)
+#define REG_TCSR1		(TMR_BA+0x04)
+#define REG_TICR0		(TMR_BA+0x08)
+#define REG_TICR1		(TMR_BA+0x0C)
+#define REG_TDR0		(TMR_BA+0x10)
+#define REG_TDR1		(TMR_BA+0x14)
+#define REG_TISR		(TMR_BA+0x18)
+#define REG_WTCR		(TMR_BA+0x1C)
+#define REG_TCSR2		(TMR_BA+0x20)
+#define REG_TCSR3		(TMR_BA+0x24)
+#define REG_TICR2		(TMR_BA+0x28)
+#define REG_TICR3		(TMR_BA+0x2C)
+#define REG_TDR2		(TMR_BA+0x30)
+#define REG_TDR3		(TMR_BA+0x34)
+#define REG_TCSR4		(TMR_BA+0x40)
+#define REG_TICR4		(TMR_BA+0x48)
+#define REG_TDR4		(TMR_BA+0x50)
+
+#endif /*  __ASM_ARCH_REGS_TIMER_H */

arch/arm/mach-w90x900/regs-usb.h

@@ -0,0 +1,35 @@
+/*
+ * arch/arm/mach-w90x900/include/mach/regs-usb.h
+ *
+ * Copyright (c) 2008 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_REGS_USB_H
+#define __ASM_ARCH_REGS_USB_H
+
+/* usb Control Registers  */
+#define USBH_BA		W90X900_VA_USBEHCIHOST
+#define USBD_BA		W90X900_VA_USBDEV
+#define USBO_BA		W90X900_VA_USBOHCIHOST
+
+/* USB Host Control Registers */
+#define REG_UPSCR0	(USBH_BA+0x064)
+#define REG_UPSCR1	(USBH_BA+0x068)
+#define REG_USBPCR0	(USBH_BA+0x0C4)
+#define REG_USBPCR1	(USBH_BA+0x0C8)
+
+/* USBH OHCI Control Registers */
+#define REG_OpModEn	(USBO_BA+0x204)
+/*This bit controls the polarity of over
+*current flag from external power IC.
+*/
+#define OCALow		0x08
+
+#endif /*  __ASM_ARCH_REGS_USB_H */

arch/arm/mach-w90x900/time.c

@@ -0,0 +1,173 @@
+/*
+ * linux/arch/arm/mach-w90x900/time.c
+ *
+ * Based on linux/arch/arm/plat-s3c24xx/time.c by Ben Dooks
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation
+ * All rights reserved.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/leds.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/irq.h>
+#include <asm/mach/time.h>
+
+#include <mach/map.h>
+#include "regs-timer.h"
+
+#include "nuc9xx.h"
+
+#define RESETINT	0x1f
+#define PERIOD		(0x01 << 27)
+#define ONESHOT		(0x00 << 27)
+#define COUNTEN		(0x01 << 30)
+#define INTEN		(0x01 << 29)
+
+#define TICKS_PER_SEC	100
+#define PRESCALE	0x63 /* Divider = prescale + 1 */
+
+#define	TDR_SHIFT	24
+
+static unsigned int timer0_load;
+
+static int nuc900_clockevent_shutdown(struct clock_event_device *evt)
+{
+	unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
+
+	__raw_writel(val, REG_TCSR0);
+	return 0;
+}
+
+static int nuc900_clockevent_set_oneshot(struct clock_event_device *evt)
+{
+	unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
+
+	val |= (ONESHOT | COUNTEN | INTEN | PRESCALE);
+
+	__raw_writel(val, REG_TCSR0);
+	return 0;
+}
+
+static int nuc900_clockevent_set_periodic(struct clock_event_device *evt)
+{
+	unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
+
+	__raw_writel(timer0_load, REG_TICR0);
+	val |= (PERIOD | COUNTEN | INTEN | PRESCALE);
+	__raw_writel(val, REG_TCSR0);
+	return 0;
+}
+
+static int nuc900_clockevent_setnextevent(unsigned long evt,
+		struct clock_event_device *clk)
+{
+	unsigned int val;
+
+	__raw_writel(evt, REG_TICR0);
+
+	val = __raw_readl(REG_TCSR0);
+	val |= (COUNTEN | INTEN | PRESCALE);
+	__raw_writel(val, REG_TCSR0);
+
+	return 0;
+}
+
+static struct clock_event_device nuc900_clockevent_device = {
+	.name			= "nuc900-timer0",
+	.features		= CLOCK_EVT_FEAT_PERIODIC |
+				  CLOCK_EVT_FEAT_ONESHOT,
+	.set_state_shutdown	= nuc900_clockevent_shutdown,
+	.set_state_periodic	= nuc900_clockevent_set_periodic,
+	.set_state_oneshot	= nuc900_clockevent_set_oneshot,
+	.tick_resume		= nuc900_clockevent_shutdown,
+	.set_next_event		= nuc900_clockevent_setnextevent,
+	.rating			= 300,
+};
+
+/*IRQ handler for the timer*/
+
+static irqreturn_t nuc900_timer0_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evt = &nuc900_clockevent_device;
+
+	__raw_writel(0x01, REG_TISR); /* clear TIF0 */
+
+	evt->event_handler(evt);
+	return IRQ_HANDLED;
+}
+
+static struct irqaction nuc900_timer0_irq = {
+	.name		= "nuc900-timer0",
+	.flags		= IRQF_TIMER | IRQF_IRQPOLL,
+	.handler	= nuc900_timer0_interrupt,
+};
+
+static void __init nuc900_clockevents_init(void)
+{
+	unsigned int rate;
+	struct clk *clk = clk_get(NULL, "timer0");
+
+	BUG_ON(IS_ERR(clk));
+
+	__raw_writel(0x00, REG_TCSR0);
+
+	clk_enable(clk);
+	rate = clk_get_rate(clk) / (PRESCALE + 1);
+
+	timer0_load = (rate / TICKS_PER_SEC);
+
+	__raw_writel(RESETINT, REG_TISR);
+	setup_irq(IRQ_TIMER0, &nuc900_timer0_irq);
+
+	nuc900_clockevent_device.cpumask = cpumask_of(0);
+
+	clockevents_config_and_register(&nuc900_clockevent_device, rate,
+					0xf, 0xffffffff);
+}
+
+static void __init nuc900_clocksource_init(void)
+{
+	unsigned int val;
+	unsigned int rate;
+	struct clk *clk = clk_get(NULL, "timer1");
+
+	BUG_ON(IS_ERR(clk));
+
+	__raw_writel(0x00, REG_TCSR1);
+
+	clk_enable(clk);
+	rate = clk_get_rate(clk) / (PRESCALE + 1);
+
+	__raw_writel(0xffffffff, REG_TICR1);
+
+	val = __raw_readl(REG_TCSR1);
+	val |= (COUNTEN | PERIOD | PRESCALE);
+	__raw_writel(val, REG_TCSR1);
+
+	clocksource_mmio_init(REG_TDR1, "nuc900-timer1", rate, 200,
+		TDR_SHIFT, clocksource_mmio_readl_down);
+}
+
+void __init nuc900_timer_init(void)
+{
+	nuc900_clocksource_init();
+	nuc900_clockevents_init();
+}

arch/arm/mach-zx/Kconfig

@@ -0,0 +1,20 @@
+menuconfig ARCH_ZX
+	bool "ZTE ZX family"
+	depends on ARCH_MULTI_V7
+	help
+	  Support for ZTE ZX-based family of processors. TV
+	  set-top-box processor is supported. More will be
+	  added soon.
+
+if ARCH_ZX
+
+config SOC_ZX296702
+	def_bool y
+	select ARM_GIC
+	select ARM_GLOBAL_TIMER
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if SMP
+	select PM_GENERIC_DOMAINS if PM
+	help
+	  Support for ZTE ZX296702 SoC which is a dual core CortexA9MP
+endif

arch/arm/mach-zx/Makefile

@@ -0,0 +1,2 @@
+obj-$(CONFIG_SOC_ZX296702) += zx296702.o zx296702-pm-domain.o
+obj-$(CONFIG_SMP) += headsmp.o platsmp.o

arch/arm/mach-zx/core.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2014 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MACH_ZX_CORE_H
+#define __MACH_ZX_CORE_H
+
+extern void zx_resume_jump(void);
+extern size_t zx_suspend_iram_sz;
+extern unsigned long zx_secondary_startup_pa;
+
+void zx_secondary_startup(void);
+
+#endif /* __MACH_ZX_CORE_H */

arch/arm/mach-zx/headsmp.S

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2014 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/linkage.h>
+
+	.align 3
+	.arm
+
+/* It runs from physical address */
+ENTRY(zx_resume_jump)
+	adr	r1, zx_secondary_startup_pa
+	ldr	r0, [r1]
+	bx	r0
+ENDPROC(zx_resume_jump)
+
+ENTRY(zx_secondary_startup_pa)
+	.word	zx_secondary_startup_pa
+
+ENTRY(zx_suspend_iram_sz)
+        .word	. - zx_resume_jump
+ENDPROC(zx_secondary_startup_pa)
+
+
+ENTRY(zx_secondary_startup)
+	bl	v7_invalidate_l1
+	b	secondary_startup
+ENDPROC(zx_secondary_startup)

arch/arm/mach-zx/platsmp.c

@@ -0,0 +1,189 @@
+/*
+ * Copyright 2014 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/smp.h>
+
+#include <asm/cacheflush.h>
+#include <asm/cp15.h>
+#include <asm/fncpy.h>
+#include <asm/proc-fns.h>
+#include <asm/smp_scu.h>
+#include <asm/smp_plat.h>
+
+#include "core.h"
+
+#define AON_SYS_CTRL_RESERVED1		0xa8
+
+#define BUS_MATRIX_REMAP_CONFIG		0x00
+
+#define PCU_CPU0_CTRL			0x00
+#define PCU_CPU1_CTRL			0x04
+#define PCU_CPU1_ST			0x0c
+#define PCU_GLOBAL_CTRL			0x14
+#define PCU_EXPEND_CONTROL		0x34
+
+#define ZX_IRAM_BASE			0x00200000
+
+static void __iomem *pcu_base;
+static void __iomem *matrix_base;
+static void __iomem *scu_base;
+
+void __init zx_smp_prepare_cpus(unsigned int max_cpus)
+{
+	struct device_node *np;
+	unsigned long base = 0;
+	void __iomem *aonsysctrl_base;
+	void __iomem *sys_iram;
+
+	base = scu_a9_get_base();
+	scu_base = ioremap(base, SZ_256);
+	if (!scu_base) {
+		pr_err("%s: failed to map scu\n", __func__);
+		return;
+	}
+
+	scu_enable(scu_base);
+
+	np = of_find_compatible_node(NULL, NULL, "zte,sysctrl");
+	if (!np) {
+		pr_err("%s: failed to find sysctrl node\n", __func__);
+		return;
+	}
+
+	aonsysctrl_base = of_iomap(np, 0);
+	if (!aonsysctrl_base) {
+		pr_err("%s: failed to map aonsysctrl\n", __func__);
+		of_node_put(np);
+		return;
+	}
+
+	/*
+	 * Write the address of secondary startup into the
+	 * system-wide flags register. The BootMonitor waits
+	 * until it receives a soft interrupt, and then the
+	 * secondary CPU branches to this address.
+	 */
+	__raw_writel(virt_to_phys(zx_secondary_startup),
+		     aonsysctrl_base + AON_SYS_CTRL_RESERVED1);
+
+	iounmap(aonsysctrl_base);
+	of_node_put(np);
+
+	np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");
+	pcu_base = of_iomap(np, 0);
+	of_node_put(np);
+	WARN_ON(!pcu_base);
+
+	np = of_find_compatible_node(NULL, NULL, "zte,zx-bus-matrix");
+	matrix_base = of_iomap(np, 0);
+	of_node_put(np);
+	WARN_ON(!matrix_base);
+
+	/* Map the first 4 KB IRAM for suspend usage */
+	sys_iram = __arm_ioremap_exec(ZX_IRAM_BASE, PAGE_SIZE, false);
+	zx_secondary_startup_pa = virt_to_phys(zx_secondary_startup);
+	fncpy(sys_iram, &zx_resume_jump, zx_suspend_iram_sz);
+}
+
+static int zx_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	static bool first_boot = true;
+
+	if (first_boot) {
+		arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+		first_boot = false;
+		return 0;
+	}
+
+	/* Swap the base address mapping between IRAM and IROM */
+	writel_relaxed(0x1, matrix_base + BUS_MATRIX_REMAP_CONFIG);
+
+	/* Power on CPU1 */
+	writel_relaxed(0x0, pcu_base + PCU_CPU1_CTRL);
+
+	/* Wait for power on ack */
+	while (readl_relaxed(pcu_base + PCU_CPU1_ST) & 0x4)
+		cpu_relax();
+
+	/* Swap back the mapping of IRAM and IROM */
+	writel_relaxed(0x0, matrix_base + BUS_MATRIX_REMAP_CONFIG);
+
+	return 0;
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static inline void cpu_enter_lowpower(void)
+{
+	unsigned int v;
+
+	asm volatile(
+		"mcr	p15, 0, %1, c7, c5, 0\n"
+	"	mcr	p15, 0, %1, c7, c10, 4\n"
+	/*
+	 * Turn off coherency
+	 */
+	"	mrc	p15, 0, %0, c1, c0, 1\n"
+	"	bic	%0, %0, %3\n"
+	"	mcr	p15, 0, %0, c1, c0, 1\n"
+	"	mrc	p15, 0, %0, c1, c0, 0\n"
+	"	bic	%0, %0, %2\n"
+	"	mcr	p15, 0, %0, c1, c0, 0\n"
+	  : "=&r" (v)
+	  : "r" (0), "Ir" (CR_C), "Ir" (0x40)
+	  : "cc");
+}
+
+static int zx_cpu_kill(unsigned int cpu)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(2000);
+
+	writel_relaxed(0x2, pcu_base + PCU_CPU1_CTRL);
+
+	while ((readl_relaxed(pcu_base + PCU_CPU1_ST) & 0x3) != 0x0) {
+		if (time_after(jiffies, timeout)) {
+			pr_err("*** cpu1 poweroff timeout\n");
+			break;
+		}
+	}
+	return 1;
+}
+
+static void zx_cpu_die(unsigned int cpu)
+{
+	scu_power_mode(scu_base, SCU_PM_POWEROFF);
+	cpu_enter_lowpower();
+
+	while (1)
+		cpu_do_idle();
+}
+#endif
+
+static void zx_secondary_init(unsigned int cpu)
+{
+	scu_power_mode(scu_base, SCU_PM_NORMAL);
+}
+
+static const struct smp_operations zx_smp_ops __initconst = {
+	.smp_prepare_cpus	= zx_smp_prepare_cpus,
+	.smp_secondary_init	= zx_secondary_init,
+	.smp_boot_secondary	= zx_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_kill		= zx_cpu_kill,
+	.cpu_die		= zx_cpu_die,
+#endif
+};
+
+CPU_METHOD_OF_DECLARE(zx_smp, "zte,zx296702-smp", &zx_smp_ops);

arch/arm/mach-zx/zx296702-pm-domain.c

@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2015 Linaro Ltd.
+ *
+ * Author: Jun Nie <jun.nie@linaro.org>
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+
+#define PCU_DM_CLKEN        0x18
+#define PCU_DM_RSTEN        0x1C
+#define PCU_DM_ISOEN        0x20
+#define PCU_DM_PWRDN        0x24
+#define PCU_DM_ACK_SYNC     0x28
+
+enum {
+	PCU_DM_NEON0 = 0,
+	PCU_DM_NEON1,
+	PCU_DM_GPU,
+	PCU_DM_DECPPU,
+	PCU_DM_VOU,
+	PCU_DM_R2D,
+	PCU_DM_TOP,
+};
+
+static void __iomem *pcubase;
+
+struct zx_pm_domain {
+	struct generic_pm_domain dm;
+	unsigned int bit;
+};
+
+static int normal_power_off(struct generic_pm_domain *domain)
+{
+	struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
+	unsigned long loop = 1000;
+	u32 tmp;
+
+	tmp = readl_relaxed(pcubase + PCU_DM_CLKEN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp, pcubase + PCU_DM_CLKEN);
+	udelay(5);
+
+	tmp = readl_relaxed(pcubase + PCU_DM_ISOEN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_ISOEN);
+	udelay(5);
+
+	tmp = readl_relaxed(pcubase + PCU_DM_RSTEN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp, pcubase + PCU_DM_RSTEN);
+	udelay(5);
+
+	tmp = readl_relaxed(pcubase + PCU_DM_PWRDN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_PWRDN);
+	do {
+		tmp = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
+	} while (--loop && !tmp);
+
+	if (!loop) {
+		pr_err("Error: %s %s fail\n", __func__, domain->name);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int normal_power_on(struct generic_pm_domain *domain)
+{
+	struct zx_pm_domain *zpd = (struct zx_pm_domain *)domain;
+	unsigned long loop = 10000;
+	u32 tmp;
+
+	tmp = readl_relaxed(pcubase + PCU_DM_PWRDN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp, pcubase + PCU_DM_PWRDN);
+	do {
+		tmp = readl_relaxed(pcubase + PCU_DM_ACK_SYNC) & BIT(zpd->bit);
+	} while (--loop && tmp);
+
+	if (!loop) {
+		pr_err("Error: %s %s fail\n", __func__, domain->name);
+		return -EIO;
+	}
+
+	tmp = readl_relaxed(pcubase + PCU_DM_RSTEN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_RSTEN);
+	udelay(5);
+
+	tmp = readl_relaxed(pcubase + PCU_DM_ISOEN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp, pcubase + PCU_DM_ISOEN);
+	udelay(5);
+
+	tmp = readl_relaxed(pcubase + PCU_DM_CLKEN);
+	tmp &= ~BIT(zpd->bit);
+	writel_relaxed(tmp | BIT(zpd->bit), pcubase + PCU_DM_CLKEN);
+	udelay(5);
+	return 0;
+}
+
+static struct zx_pm_domain gpu_domain = {
+	.dm = {
+		.name		= "gpu_domain",
+		.power_off	= normal_power_off,
+		.power_on	= normal_power_on,
+	},
+	.bit = PCU_DM_GPU,
+};
+
+static struct zx_pm_domain decppu_domain = {
+	.dm = {
+		.name		= "decppu_domain",
+		.power_off	= normal_power_off,
+		.power_on	= normal_power_on,
+	},
+	.bit = PCU_DM_DECPPU,
+};
+
+static struct zx_pm_domain vou_domain = {
+	.dm = {
+		.name		= "vou_domain",
+		.power_off	= normal_power_off,
+		.power_on	= normal_power_on,
+	},
+	.bit = PCU_DM_VOU,
+};
+
+static struct zx_pm_domain r2d_domain = {
+	.dm = {
+		.name		= "r2d_domain",
+		.power_off	= normal_power_off,
+		.power_on	= normal_power_on,
+	},
+	.bit = PCU_DM_R2D,
+};
+
+static struct generic_pm_domain *zx296702_pm_domains[] = {
+	&vou_domain.dm,
+	&gpu_domain.dm,
+	&decppu_domain.dm,
+	&r2d_domain.dm,
+};
+
+static int zx296702_pd_probe(struct platform_device *pdev)
+{
+	struct genpd_onecell_data *genpd_data;
+	struct resource *res;
+	int i;
+
+	genpd_data = devm_kzalloc(&pdev->dev, sizeof(*genpd_data), GFP_KERNEL);
+	if (!genpd_data)
+		return -ENOMEM;
+
+	genpd_data->domains = zx296702_pm_domains;
+	genpd_data->num_domains = ARRAY_SIZE(zx296702_pm_domains);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "no memory resource defined\n");
+		return -ENODEV;
+	}
+
+	pcubase = devm_ioremap_resource(&pdev->dev, res);
+	if (!pcubase) {
+		dev_err(&pdev->dev, "ioremap fail.\n");
+		return -EIO;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(zx296702_pm_domains); ++i)
+		pm_genpd_init(zx296702_pm_domains[i], NULL, false);
+
+	of_genpd_add_provider_onecell(pdev->dev.of_node, genpd_data);
+	return 0;
+}
+
+static const struct of_device_id zx296702_pm_domain_matches[] __initconst = {
+	{ .compatible = "zte,zx296702-pcu", },
+	{ },
+};
+
+static struct platform_driver zx296702_pd_driver __initdata = {
+	.driver = {
+		.name = "zx-powerdomain",
+		.owner = THIS_MODULE,
+		.of_match_table = zx296702_pm_domain_matches,
+	},
+	.probe = zx296702_pd_probe,
+};
+
+static int __init zx296702_pd_init(void)
+{
+	return platform_driver_register(&zx296702_pd_driver);
+}
+subsys_initcall(zx296702_pd_init);

arch/arm/mach-zx/zx296702.c

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2014 Linaro Ltd.
+ * Copyright (C) 2014 ZTE Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+static const char *const zx296702_dt_compat[] __initconst = {
+	"zte,zx296702",
+	NULL,
+};
+
+DT_MACHINE_START(ZX, "ZTE ZX296702 (Device Tree)")
+	.dt_compat	= zx296702_dt_compat,
+	.l2c_aux_val    = 0,
+	.l2c_aux_mask   = ~0,
+MACHINE_END

arch/arm/mach-zynq/Kconfig

@@ -0,0 +1,18 @@
+config ARCH_ZYNQ
+	bool "Xilinx Zynq ARM Cortex A9 Platform"
+	depends on ARCH_MULTI_V7
+	select ARCH_HAS_RESET_CONTROLLER
+	select ARCH_SUPPORTS_BIG_ENDIAN
+	select ARM_AMBA
+	select ARM_GIC
+	select ARM_GLOBAL_TIMER if !CPU_FREQ
+	select CADENCE_TTC_TIMER
+	select HAVE_ARM_SCU if SMP
+	select HAVE_ARM_TWD if SMP
+	select ICST
+	select MFD_SYSCON
+	select PINCTRL
+	select PINCTRL_ZYNQ
+	select SOC_BUS
+	help
+	  Support for Xilinx Zynq ARM Cortex A9 Platform

arch/arm/mach-zynq/Makefile

@@ -0,0 +1,7 @@
+#
+# Makefile for the linux kernel.
+#
+
+# Common support
+obj-y				:= common.o slcr.o pm.o
+obj-$(CONFIG_SMP)		+= headsmp.o platsmp.o

arch/arm/mach-zynq/common.c

@@ -0,0 +1,206 @@
+/*
+ * This file contains common code that is intended to be used across
+ * boards so that it's not replicated.
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/cpumask.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clk/zynq.h>
+#include <linux/clocksource.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/of.h>
+#include <linux/memblock.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/slab.h>
+#include <linux/sys_soc.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+#include <asm/mach-types.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/smp_scu.h>
+#include <asm/system_info.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include "common.h"
+
+#define ZYNQ_DEVCFG_MCTRL		0x80
+#define ZYNQ_DEVCFG_PS_VERSION_SHIFT	28
+#define ZYNQ_DEVCFG_PS_VERSION_MASK	0xF
+
+void __iomem *zynq_scu_base;
+
+/**
+ * zynq_memory_init - Initialize special memory
+ *
+ * We need to stop things allocating the low memory as DMA can't work in
+ * the 1st 512K of memory.
+ */
+static void __init zynq_memory_init(void)
+{
+	if (!__pa(PAGE_OFFSET))
+		memblock_reserve(__pa(PAGE_OFFSET), 0x80000);
+}
+
+static struct platform_device zynq_cpuidle_device = {
+	.name = "cpuidle-zynq",
+};
+
+/**
+ * zynq_get_revision - Get Zynq silicon revision
+ *
+ * Return: Silicon version or -1 otherwise
+ */
+static int __init zynq_get_revision(void)
+{
+	struct device_node *np;
+	void __iomem *zynq_devcfg_base;
+	u32 revision;
+
+	np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-devcfg-1.0");
+	if (!np) {
+		pr_err("%s: no devcfg node found\n", __func__);
+		return -1;
+	}
+
+	zynq_devcfg_base = of_iomap(np, 0);
+	if (!zynq_devcfg_base) {
+		pr_err("%s: Unable to map I/O memory\n", __func__);
+		return -1;
+	}
+
+	revision = readl(zynq_devcfg_base + ZYNQ_DEVCFG_MCTRL);
+	revision >>= ZYNQ_DEVCFG_PS_VERSION_SHIFT;
+	revision &= ZYNQ_DEVCFG_PS_VERSION_MASK;
+
+	iounmap(zynq_devcfg_base);
+
+	return revision;
+}
+
+static void __init zynq_init_late(void)
+{
+	zynq_core_pm_init();
+	zynq_pm_late_init();
+}
+
+/**
+ * zynq_init_machine - System specific initialization, intended to be
+ *		       called from board specific initialization.
+ */
+static void __init zynq_init_machine(void)
+{
+	struct soc_device_attribute *soc_dev_attr;
+	struct soc_device *soc_dev;
+	struct device *parent = NULL;
+
+	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+	if (!soc_dev_attr)
+		goto out;
+
+	system_rev = zynq_get_revision();
+
+	soc_dev_attr->family = kasprintf(GFP_KERNEL, "Xilinx Zynq");
+	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "0x%x", system_rev);
+	soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "0x%x",
+					 zynq_slcr_get_device_id());
+
+	soc_dev = soc_device_register(soc_dev_attr);
+	if (IS_ERR(soc_dev)) {
+		kfree(soc_dev_attr->family);
+		kfree(soc_dev_attr->revision);
+		kfree(soc_dev_attr->soc_id);
+		kfree(soc_dev_attr);
+		goto out;
+	}
+
+	parent = soc_device_to_device(soc_dev);
+
+out:
+	/*
+	 * Finished with the static registrations now; fill in the missing
+	 * devices
+	 */
+	of_platform_default_populate(NULL, NULL, parent);
+
+	platform_device_register(&zynq_cpuidle_device);
+}
+
+static void __init zynq_timer_init(void)
+{
+	zynq_clock_init();
+	of_clk_init(NULL);
+	clocksource_probe();
+}
+
+static struct map_desc zynq_cortex_a9_scu_map __initdata = {
+	.length	= SZ_256,
+	.type	= MT_DEVICE,
+};
+
+static void __init zynq_scu_map_io(void)
+{
+	unsigned long base;
+
+	base = scu_a9_get_base();
+	zynq_cortex_a9_scu_map.pfn = __phys_to_pfn(base);
+	/* Expected address is in vmalloc area that's why simple assign here */
+	zynq_cortex_a9_scu_map.virtual = base;
+	iotable_init(&zynq_cortex_a9_scu_map, 1);
+	zynq_scu_base = (void __iomem *)base;
+	BUG_ON(!zynq_scu_base);
+}
+
+/**
+ * zynq_map_io - Create memory mappings needed for early I/O.
+ */
+static void __init zynq_map_io(void)
+{
+	debug_ll_io_init();
+	zynq_scu_map_io();
+}
+
+static void __init zynq_irq_init(void)
+{
+	zynq_early_slcr_init();
+	irqchip_init();
+}
+
+static const char * const zynq_dt_match[] = {
+	"xlnx,zynq-7000",
+	NULL
+};
+
+DT_MACHINE_START(XILINX_EP107, "Xilinx Zynq Platform")
+	/* 64KB way size, 8-way associativity, parity disabled */
+	.l2c_aux_val    = 0x00400000,
+	.l2c_aux_mask	= 0xffbfffff,
+	.smp		= smp_ops(zynq_smp_ops),
+	.map_io		= zynq_map_io,
+	.init_irq	= zynq_irq_init,
+	.init_machine	= zynq_init_machine,
+	.init_late	= zynq_init_late,
+	.init_time	= zynq_timer_init,
+	.dt_compat	= zynq_dt_match,
+	.reserve	= zynq_memory_init,
+MACHINE_END

arch/arm/mach-zynq/common.h

@@ -0,0 +1,51 @@
+/*
+ * This file contains common function prototypes to avoid externs
+ * in the c files.
+ *
+ *  Copyright (C) 2011 Xilinx
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __MACH_ZYNQ_COMMON_H__
+#define __MACH_ZYNQ_COMMON_H__
+
+extern int zynq_slcr_init(void);
+extern int zynq_early_slcr_init(void);
+extern void zynq_slcr_cpu_stop(int cpu);
+extern void zynq_slcr_cpu_start(int cpu);
+extern bool zynq_slcr_cpu_state_read(int cpu);
+extern void zynq_slcr_cpu_state_write(int cpu, bool die);
+extern u32 zynq_slcr_get_device_id(void);
+
+#ifdef CONFIG_SMP
+extern char zynq_secondary_trampoline;
+extern char zynq_secondary_trampoline_jump;
+extern char zynq_secondary_trampoline_end;
+extern int zynq_cpun_start(u32 address, int cpu);
+extern const struct smp_operations zynq_smp_ops;
+#endif
+
+extern void __iomem *zynq_scu_base;
+
+void zynq_pm_late_init(void);
+
+static inline void zynq_core_pm_init(void)
+{
+	/* A9 clock gating */
+	asm volatile ("mrc  p15, 0, r12, c15, c0, 0\n"
+		      "orr  r12, r12, #1\n"
+		      "mcr  p15, 0, r12, c15, c0, 0\n"
+		      : /* no outputs */
+		      : /* no inputs */
+		      : "r12");
+}
+
+#endif

arch/arm/mach-zynq/headsmp.S

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2013 Steffen Trumtrar <s.trumtrar@pengutronix.de>
+ * Copyright (c) 2012-2013 Xilinx
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/assembler.h>
+
+ENTRY(zynq_secondary_trampoline)
+ARM_BE8(setend	be)				@ ensure we are in BE8 mode
+	ldr	r0, zynq_secondary_trampoline_jump
+ARM_BE8(rev	r0, r0)
+	bx	r0
+.globl zynq_secondary_trampoline_jump
+zynq_secondary_trampoline_jump:
+	/* Space for jumping address */
+	.word	0	/* cpu 1 */
+.globl zynq_secondary_trampoline_end
+zynq_secondary_trampoline_end:
+ENDPROC(zynq_secondary_trampoline)

arch/arm/mach-zynq/platsmp.c

@@ -0,0 +1,169 @@
+/*
+ * This file contains Xilinx specific SMP code, used to start up
+ * the second processor.
+ *
+ * Copyright (C) 2011-2013 Xilinx
+ *
+ * based on linux/arch/arm/mach-realview/platsmp.c
+ *
+ * Copyright (C) 2002 ARM Ltd.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/export.h>
+#include <linux/jiffies.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <asm/cacheflush.h>
+#include <asm/smp_scu.h>
+#include <linux/irqchip/arm-gic.h>
+#include "common.h"
+
+/*
+ * Store number of cores in the system
+ * Because of scu_get_core_count() must be in __init section and can't
+ * be called from zynq_cpun_start() because it is not in __init section.
+ */
+static int ncores;
+
+int zynq_cpun_start(u32 address, int cpu)
+{
+	u32 trampoline_code_size = &zynq_secondary_trampoline_end -
+						&zynq_secondary_trampoline;
+
+	/* MS: Expectation that SLCR are directly map and accessible */
+	/* Not possible to jump to non aligned address */
+	if (!(address & 3) && (!address || (address >= trampoline_code_size))) {
+		/* Store pointer to ioremap area which points to address 0x0 */
+		static u8 __iomem *zero;
+		u32 trampoline_size = &zynq_secondary_trampoline_jump -
+						&zynq_secondary_trampoline;
+
+		zynq_slcr_cpu_stop(cpu);
+		if (address) {
+			if (__pa(PAGE_OFFSET)) {
+				zero = ioremap(0, trampoline_code_size);
+				if (!zero) {
+					pr_warn("BOOTUP jump vectors not accessible\n");
+					return -1;
+				}
+			} else {
+				zero = (__force u8 __iomem *)PAGE_OFFSET;
+			}
+
+			/*
+			* This is elegant way how to jump to any address
+			* 0x0: Load address at 0x8 to r0
+			* 0x4: Jump by mov instruction
+			* 0x8: Jumping address
+			*/
+			memcpy((__force void *)zero, &zynq_secondary_trampoline,
+							trampoline_size);
+			writel(address, zero + trampoline_size);
+
+			flush_cache_all();
+			outer_flush_range(0, trampoline_code_size);
+			smp_wmb();
+
+			if (__pa(PAGE_OFFSET))
+				iounmap(zero);
+		}
+		zynq_slcr_cpu_start(cpu);
+
+		return 0;
+	}
+
+	pr_warn("Can't start CPU%d: Wrong starting address %x\n", cpu, address);
+
+	return -1;
+}
+EXPORT_SYMBOL(zynq_cpun_start);
+
+static int zynq_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	return zynq_cpun_start(virt_to_phys(secondary_startup), cpu);
+}
+
+/*
+ * Initialise the CPU possible map early - this describes the CPUs
+ * which may be present or become present in the system.
+ */
+static void __init zynq_smp_init_cpus(void)
+{
+	int i;
+
+	ncores = scu_get_core_count(zynq_scu_base);
+
+	for (i = 0; i < ncores && i < CONFIG_NR_CPUS; i++)
+		set_cpu_possible(i, true);
+}
+
+static void __init zynq_smp_prepare_cpus(unsigned int max_cpus)
+{
+	scu_enable(zynq_scu_base);
+}
+
+/**
+ * zynq_secondary_init - Initialize secondary CPU cores
+ * @cpu:	CPU that is initialized
+ *
+ * This function is in the hotplug path. Don't move it into the
+ * init section!!
+ */
+static void zynq_secondary_init(unsigned int cpu)
+{
+	zynq_core_pm_init();
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int zynq_cpu_kill(unsigned cpu)
+{
+	unsigned long timeout = jiffies + msecs_to_jiffies(50);
+
+	while (zynq_slcr_cpu_state_read(cpu))
+		if (time_after(jiffies, timeout))
+			return 0;
+
+	zynq_slcr_cpu_stop(cpu);
+	return 1;
+}
+
+/**
+ * zynq_cpu_die - Let a CPU core die
+ * @cpu:	Dying CPU
+ *
+ * Platform-specific code to shutdown a CPU.
+ * Called with IRQs disabled on the dying CPU.
+ */
+static void zynq_cpu_die(unsigned int cpu)
+{
+	zynq_slcr_cpu_state_write(cpu, true);
+
+	/*
+	 * there is no power-control hardware on this platform, so all
+	 * we can do is put the core into WFI; this is safe as the calling
+	 * code will have already disabled interrupts
+	 */
+	for (;;)
+		cpu_do_idle();
+}
+#endif
+
+const struct smp_operations zynq_smp_ops __initconst = {
+	.smp_init_cpus		= zynq_smp_init_cpus,
+	.smp_prepare_cpus	= zynq_smp_prepare_cpus,
+	.smp_boot_secondary	= zynq_boot_secondary,
+	.smp_secondary_init	= zynq_secondary_init,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= zynq_cpu_die,
+	.cpu_kill		= zynq_cpu_kill,
+#endif
+};

arch/arm/mach-zynq/pm.c

@@ -0,0 +1,83 @@
+/*
+ * Zynq power management
+ *
+ *  Copyright (C) 2012 - 2014 Xilinx
+ *
+ *  Sören Brinkmann <soren.brinkmann@xilinx.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include "common.h"
+
+/* register offsets */
+#define DDRC_CTRL_REG1_OFFS		0x60
+#define DDRC_DRAM_PARAM_REG3_OFFS	0x20
+
+/* bitfields */
+#define DDRC_CLOCKSTOP_MASK	BIT(23)
+#define DDRC_SELFREFRESH_MASK	BIT(12)
+
+static void __iomem *ddrc_base;
+
+/**
+ * zynq_pm_ioremap() - Create IO mappings
+ * @comp:	DT compatible string
+ * Return: Pointer to the mapped memory or NULL.
+ *
+ * Remap the memory region for a compatible DT node.
+ */
+static void __iomem *zynq_pm_ioremap(const char *comp)
+{
+	struct device_node *np;
+	void __iomem *base = NULL;
+
+	np = of_find_compatible_node(NULL, NULL, comp);
+	if (np) {
+		base = of_iomap(np, 0);
+		of_node_put(np);
+	} else {
+		pr_warn("%s: no compatible node found for '%s'\n", __func__,
+				comp);
+	}
+
+	return base;
+}
+
+/**
+ * zynq_pm_late_init() - Power management init
+ *
+ * Initialization of power management related features and infrastructure.
+ */
+void __init zynq_pm_late_init(void)
+{
+	u32 reg;
+
+	ddrc_base = zynq_pm_ioremap("xlnx,zynq-ddrc-a05");
+	if (!ddrc_base) {
+		pr_warn("%s: Unable to map DDRC IO memory.\n", __func__);
+	} else {
+		/*
+		 * Enable DDRC clock stop feature. The HW takes care of
+		 * entering/exiting the correct mode depending
+		 * on activity state.
+		 */
+		reg = readl(ddrc_base + DDRC_DRAM_PARAM_REG3_OFFS);
+		reg |= DDRC_CLOCKSTOP_MASK;
+		writel(reg, ddrc_base + DDRC_DRAM_PARAM_REG3_OFFS);
+	}
+}

arch/arm/mach-zynq/slcr.c

@@ -0,0 +1,241 @@
+/*
+ * Xilinx SLCR driver
+ *
+ * Copyright (c) 2011-2013 Xilinx Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
+ * 02139, USA.
+ */
+
+#include <linux/io.h>
+#include <linux/reboot.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/regmap.h>
+#include <linux/clk/zynq.h>
+#include "common.h"
+
+/* register offsets */
+#define SLCR_UNLOCK_OFFSET		0x8   /* SCLR unlock register */
+#define SLCR_PS_RST_CTRL_OFFSET		0x200 /* PS Software Reset Control */
+#define SLCR_A9_CPU_RST_CTRL_OFFSET	0x244 /* CPU Software Reset Control */
+#define SLCR_REBOOT_STATUS_OFFSET	0x258 /* PS Reboot Status */
+#define SLCR_PSS_IDCODE			0x530 /* PS IDCODE */
+#define SLCR_L2C_RAM			0xA1C /* L2C_RAM in AR#54190 */
+
+#define SLCR_UNLOCK_MAGIC		0xDF0D
+#define SLCR_A9_CPU_CLKSTOP		0x10
+#define SLCR_A9_CPU_RST			0x1
+#define SLCR_PSS_IDCODE_DEVICE_SHIFT	12
+#define SLCR_PSS_IDCODE_DEVICE_MASK	0x1F
+
+static void __iomem *zynq_slcr_base;
+static struct regmap *zynq_slcr_regmap;
+
+/**
+ * zynq_slcr_write - Write to a register in SLCR block
+ *
+ * @val:	Value to write to the register
+ * @offset:	Register offset in SLCR block
+ *
+ * Return:	a negative value on error, 0 on success
+ */
+static int zynq_slcr_write(u32 val, u32 offset)
+{
+	return regmap_write(zynq_slcr_regmap, offset, val);
+}
+
+/**
+ * zynq_slcr_read - Read a register in SLCR block
+ *
+ * @val:	Pointer to value to be read from SLCR
+ * @offset:	Register offset in SLCR block
+ *
+ * Return:	a negative value on error, 0 on success
+ */
+static int zynq_slcr_read(u32 *val, u32 offset)
+{
+	return regmap_read(zynq_slcr_regmap, offset, val);
+}
+
+/**
+ * zynq_slcr_unlock - Unlock SLCR registers
+ *
+ * Return:	a negative value on error, 0 on success
+ */
+static inline int zynq_slcr_unlock(void)
+{
+	zynq_slcr_write(SLCR_UNLOCK_MAGIC, SLCR_UNLOCK_OFFSET);
+
+	return 0;
+}
+
+/**
+ * zynq_slcr_get_device_id - Read device code id
+ *
+ * Return:	Device code id
+ */
+u32 zynq_slcr_get_device_id(void)
+{
+	u32 val;
+
+	zynq_slcr_read(&val, SLCR_PSS_IDCODE);
+	val >>= SLCR_PSS_IDCODE_DEVICE_SHIFT;
+	val &= SLCR_PSS_IDCODE_DEVICE_MASK;
+
+	return val;
+}
+
+/**
+ * zynq_slcr_system_restart - Restart the entire system.
+ *
+ * @nb:		Pointer to restart notifier block (unused)
+ * @action:	Reboot mode (unused)
+ * @data:	Restart handler private data (unused)
+ *
+ * Return:	0 always
+ */
+static
+int zynq_slcr_system_restart(struct notifier_block *nb,
+			     unsigned long action, void *data)
+{
+	u32 reboot;
+
+	/*
+	 * Clear 0x0F000000 bits of reboot status register to workaround
+	 * the FSBL not loading the bitstream after soft-reboot
+	 * This is a temporary solution until we know more.
+	 */
+	zynq_slcr_read(&reboot, SLCR_REBOOT_STATUS_OFFSET);
+	zynq_slcr_write(reboot & 0xF0FFFFFF, SLCR_REBOOT_STATUS_OFFSET);
+	zynq_slcr_write(1, SLCR_PS_RST_CTRL_OFFSET);
+	return 0;
+}
+
+static struct notifier_block zynq_slcr_restart_nb = {
+	.notifier_call	= zynq_slcr_system_restart,
+	.priority	= 192,
+};
+
+/**
+ * zynq_slcr_cpu_start - Start cpu
+ * @cpu:	cpu number
+ */
+void zynq_slcr_cpu_start(int cpu)
+{
+	u32 reg;
+
+	zynq_slcr_read(&reg, SLCR_A9_CPU_RST_CTRL_OFFSET);
+	reg &= ~(SLCR_A9_CPU_RST << cpu);
+	zynq_slcr_write(reg, SLCR_A9_CPU_RST_CTRL_OFFSET);
+	reg &= ~(SLCR_A9_CPU_CLKSTOP << cpu);
+	zynq_slcr_write(reg, SLCR_A9_CPU_RST_CTRL_OFFSET);
+
+	zynq_slcr_cpu_state_write(cpu, false);
+}
+
+/**
+ * zynq_slcr_cpu_stop - Stop cpu
+ * @cpu:	cpu number
+ */
+void zynq_slcr_cpu_stop(int cpu)
+{
+	u32 reg;
+
+	zynq_slcr_read(&reg, SLCR_A9_CPU_RST_CTRL_OFFSET);
+	reg |= (SLCR_A9_CPU_CLKSTOP | SLCR_A9_CPU_RST) << cpu;
+	zynq_slcr_write(reg, SLCR_A9_CPU_RST_CTRL_OFFSET);
+}
+
+/**
+ * zynq_slcr_cpu_state - Read/write cpu state
+ * @cpu:	cpu number
+ *
+ * SLCR_REBOOT_STATUS save upper 2 bits (31/30 cpu states for cpu0 and cpu1)
+ * 0 means cpu is running, 1 cpu is going to die.
+ *
+ * Return: true if cpu is running, false if cpu is going to die
+ */
+bool zynq_slcr_cpu_state_read(int cpu)
+{
+	u32 state;
+
+	state = readl(zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET);
+	state &= 1 << (31 - cpu);
+
+	return !state;
+}
+
+/**
+ * zynq_slcr_cpu_state - Read/write cpu state
+ * @cpu:	cpu number
+ * @die:	cpu state - true if cpu is going to die
+ *
+ * SLCR_REBOOT_STATUS save upper 2 bits (31/30 cpu states for cpu0 and cpu1)
+ * 0 means cpu is running, 1 cpu is going to die.
+ */
+void zynq_slcr_cpu_state_write(int cpu, bool die)
+{
+	u32 state, mask;
+
+	state = readl(zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET);
+	mask = 1 << (31 - cpu);
+	if (die)
+		state |= mask;
+	else
+		state &= ~mask;
+	writel(state, zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET);
+}
+
+/**
+ * zynq_early_slcr_init - Early slcr init function
+ *
+ * Return:	0 on success, negative errno otherwise.
+ *
+ * Called very early during boot from platform code to unlock SLCR.
+ */
+int __init zynq_early_slcr_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr");
+	if (!np) {
+		pr_err("%s: no slcr node found\n", __func__);
+		BUG();
+	}
+
+	zynq_slcr_base = of_iomap(np, 0);
+	if (!zynq_slcr_base) {
+		pr_err("%s: Unable to map I/O memory\n", __func__);
+		BUG();
+	}
+
+	np->data = (__force void *)zynq_slcr_base;
+
+	zynq_slcr_regmap = syscon_regmap_lookup_by_compatible("xlnx,zynq-slcr");
+	if (IS_ERR(zynq_slcr_regmap)) {
+		pr_err("%s: failed to find zynq-slcr\n", __func__);
+		return -ENODEV;
+	}
+
+	/* unlock the SLCR so that registers can be changed */
+	zynq_slcr_unlock();
+
+	/* See AR#54190 design advisory */
+	regmap_update_bits(zynq_slcr_regmap, SLCR_L2C_RAM, 0x70707, 0x20202);
+
+	register_restart_handler(&zynq_slcr_restart_nb);
+
+	pr_info("%s mapped to %p\n", np->name, zynq_slcr_base);
+
+	of_node_put(np);
+
+	return 0;
+}