Merge branch 'next' into for-linus

Merge first round of changes for 3.13 merge window.

31 files changed, 324 insertions, 1479 deletions

diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index f8ed2de0a678..7dfba937d8fc 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -6,7 +6,7 @@
 
 config PLAT_SAMSUNG
 	bool
-	depends on PLAT_S3C24XX || ARCH_S3C64XX || PLAT_S5P
+	depends on PLAT_S3C24XX || ARCH_S3C64XX || PLAT_S5P || ARCH_EXYNOS
 	default y
 	select GENERIC_IRQ_CHIP
 	select NO_IOPORT
@@ -15,22 +15,26 @@ config PLAT_SAMSUNG
 
 config PLAT_S5P
 	bool
-	depends on (ARCH_S5P64X0 || ARCH_S5PC100 || ARCH_S5PV210 || ARCH_EXYNOS)
+	depends on (ARCH_S5P64X0 || ARCH_S5PC100 || ARCH_S5PV210)
 	default y
 	select ARCH_REQUIRE_GPIOLIB
-	select ARM_GIC if ARCH_EXYNOS
-	select ARM_VIC if !ARCH_EXYNOS
-	select GIC_NON_BANKED if ARCH_EXYNOS4
+	select ARM_VIC
 	select NO_IOPORT
 	select PLAT_SAMSUNG
 	select S3C_GPIO_TRACK
 	select S5P_GPIO_DRVSTR
 	select SAMSUNG_CLKSRC if !COMMON_CLK
 	select SAMSUNG_GPIOLIB_4BIT
-	select SAMSUNG_IRQ_VIC_TIMER
 	help
 	  Base platform code for Samsung's S5P series SoC.
 
+config SAMSUNG_PM
+	bool
+	depends on PM && (PLAT_S3C24XX || ARCH_S3C64XX || ARCH_S5P64X0 || S5P_PM)
+	default y
+	help
+	  Base platform power management code for samsung code
+
 if PLAT_SAMSUNG
 
 # boot configurations
@@ -60,13 +64,19 @@ config S3C_LOWLEVEL_UART_PORT
 	  this configuration should be between zero and two. The port
 	  must have been initialised by the boot-loader before use.
 
-# timer options
-
-config SAMSUNG_HRT
-	bool
-	select SAMSUNG_DEV_PWM
+config SAMSUNG_ATAGS
+	def_bool n
+	depends on !ARCH_MULTIPLATFORM
+	depends on ATAGS
 	help
-	  Use the High Resolution timer support
+	   This option enables ATAGS based boot support code for
+	   Samsung platforms, including static platform devices, legacy
+	   clock, timer and interrupt initialization, etc.
+
+	   Platforms that support only DT based boot need not to select
+	   this option.
+
+if SAMSUNG_ATAGS
 
 # clock options
 
@@ -87,11 +97,6 @@ config S5P_CLOCK
 
 # options for IRQ support
 
-config SAMSUNG_IRQ_VIC_TIMER
-       bool
-       help
-         Internal configuration to build the VIC timer interrupt code.
-
 config S5P_IRQ
 	def_bool (ARCH_S5P64X0 || ARCH_S5PC100 || ARCH_S5PV210)
 	help
@@ -367,11 +372,6 @@ config S5P_DEV_JPEG
 	help
 	  Compile in platform device definitions for JPEG codec
 
-config S5P_DEV_MFC
-	bool
-	help
-	  Compile in setup memory (init) code for MFC
-
 config S5P_DEV_ONENAND
 	bool
 	help
@@ -412,6 +412,21 @@ config S3C_DMA
 	help
 	  Internal configuration for S3C DMA core
 
+config S5P_IRQ_PM
+	bool
+	default y if S5P_PM
+	help
+	  Legacy IRQ power management for S5P platforms
+
+config SAMSUNG_PM_GPIO
+	bool
+	default y if GPIO_SAMSUNG && PM
+	help
+	  Include legacy GPIO power management code for platforms not using
+	  pinctrl-samsung driver.
+
+endif
+
 config SAMSUNG_DMADEV
 	bool
 	select ARM_AMBA
@@ -421,6 +436,11 @@ config SAMSUNG_DMADEV
 	help
 	  Use DMA device engine for PL330 DMAC.
 
+config S5P_DEV_MFC
+	bool
+	help
+	  Compile in setup memory (init) code for MFC
+
 comment "Power management"
 
 config SAMSUNG_PM_DEBUG
@@ -475,6 +495,12 @@ config SAMSUNG_WAKEMASK
 	  and above. This code allows a set of interrupt to wakeup-mask
 	  mappings. See <plat/wakeup-mask.h>
 
+config SAMSUNG_WDT_RESET
+	bool
+	help
+	  Compile support for system restart by triggering watchdog reset.
+	  Used on SoCs that do not provide dedicated reset control.
+
 config S5P_PM
 	bool
 	help
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index a23c460299a1..498c7c23e9f4 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -12,15 +12,12 @@ obj-				:=
 # Objects we always build independent of SoC choice
 
 obj-y				+= init.o cpu.o
-obj-$(CONFIG_SAMSUNG_HRT) 	+= samsung-time.o
 
 obj-$(CONFIG_SAMSUNG_CLOCK)	+= clock.o
-obj-$(CONFIG_SAMSUNG_CLOCK)	+= pwm-clock.o
 
 obj-$(CONFIG_SAMSUNG_CLKSRC)	+= clock-clksrc.o
 obj-$(CONFIG_S5P_CLOCK)		+= s5p-clock.o
 
-obj-$(CONFIG_SAMSUNG_IRQ_VIC_TIMER) += irq-vic-timer.o
 obj-$(CONFIG_S5P_IRQ)		+= s5p-irq.o
 obj-$(CONFIG_S5P_EXT_INT)	+= s5p-irq-eint.o
 obj-$(CONFIG_S5P_GPIO_INT)	+= s5p-irq-gpioint.o
@@ -31,10 +28,10 @@ obj-$(CONFIG_S3C_ADC)	+= adc.o
 
 # devices
 
-obj-y				+= platformdata.o
+obj-$(CONFIG_SAMSUNG_ATAGS)	+= platformdata.o
 
-obj-y				+= devs.o
-obj-y				+= dev-uart.o
+obj-$(CONFIG_SAMSUNG_ATAGS)	+= devs.o
+obj-$(CONFIG_SAMSUNG_ATAGS)	+= dev-uart.o
 obj-$(CONFIG_S5P_DEV_MFC)	+= s5p-dev-mfc.o
 obj-$(CONFIG_S5P_DEV_UART)	+= s5p-dev-uart.o
 
@@ -51,11 +48,13 @@ obj-$(CONFIG_SAMSUNG_DMADEV)	+= dma-ops.o
 
 # PM support
 
-obj-$(CONFIG_PM)		+= pm.o
-obj-$(CONFIG_PM)		+= pm-gpio.o
+obj-$(CONFIG_SAMSUNG_PM)	+= pm.o
+obj-$(CONFIG_SAMSUNG_PM_GPIO)	+= pm-gpio.o
 obj-$(CONFIG_SAMSUNG_PM_CHECK)	+= pm-check.o
 
 obj-$(CONFIG_SAMSUNG_WAKEMASK)	+= wakeup-mask.o
+obj-$(CONFIG_SAMSUNG_WDT_RESET)	+= watchdog-reset.o
 
-obj-$(CONFIG_S5P_PM)		+= s5p-pm.o s5p-irq-pm.o
+obj-$(CONFIG_S5P_PM)		+= s5p-pm.o
+obj-$(CONFIG_S5P_IRQ_PM)	+= s5p-irq-pm.o
 obj-$(CONFIG_S5P_SLEEP)		+= s5p-sleep.o
diff --git a/arch/arm/plat-samsung/dev-backlight.c b/arch/arm/plat-samsung/dev-backlight.c
index 5f197dcaf10c..d51f9565567c 100644
--- a/arch/arm/plat-samsung/dev-backlight.c
+++ b/arch/arm/plat-samsung/dev-backlight.c
@@ -20,13 +20,18 @@
 #include <plat/gpio-cfg.h>
 #include <plat/backlight.h>
 
+struct samsung_bl_drvdata {
+	struct platform_pwm_backlight_data plat_data;
+	struct samsung_bl_gpio_info *gpio_info;
+};
+
 static int samsung_bl_init(struct device *dev)
 {
 	int ret = 0;
-	struct platform_device *timer_dev =
-			container_of(dev->parent, struct platform_device, dev);
-	struct samsung_bl_gpio_info *bl_gpio_info =
-			timer_dev->dev.platform_data;
+	struct platform_pwm_backlight_data *pdata = dev->platform_data;
+	struct samsung_bl_drvdata *drvdata = container_of(pdata,
+					struct samsung_bl_drvdata, plat_data);
+	struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info;
 
 	ret = gpio_request(bl_gpio_info->no, "Backlight");
 	if (ret) {
@@ -42,10 +47,10 @@ static int samsung_bl_init(struct device *dev)
 
 static void samsung_bl_exit(struct device *dev)
 {
-	struct platform_device *timer_dev =
-			container_of(dev->parent, struct platform_device, dev);
-	struct samsung_bl_gpio_info *bl_gpio_info =
-			timer_dev->dev.platform_data;
+	struct platform_pwm_backlight_data *pdata = dev->platform_data;
+	struct samsung_bl_drvdata *drvdata = container_of(pdata,
+					struct samsung_bl_drvdata, plat_data);
+	struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info;
 
 	s3c_gpio_cfgpin(bl_gpio_info->no, S3C_GPIO_OUTPUT);
 	gpio_free(bl_gpio_info->no);
@@ -60,12 +65,14 @@ static void samsung_bl_exit(struct device *dev)
  * for their specific boards
  */
 
-static struct platform_pwm_backlight_data samsung_dfl_bl_data __initdata = {
-	.max_brightness = 255,
-	.dft_brightness = 255,
-	.pwm_period_ns  = 78770,
-	.init           = samsung_bl_init,
-	.exit           = samsung_bl_exit,
+static struct samsung_bl_drvdata samsung_dfl_bl_data __initdata = {
+	.plat_data = {
+		.max_brightness = 255,
+		.dft_brightness = 255,
+		.pwm_period_ns  = 78770,
+		.init           = samsung_bl_init,
+		.exit           = samsung_bl_exit,
+	},
 };
 
 static struct platform_device samsung_dfl_bl_device __initdata = {
@@ -82,6 +89,7 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 {
 	int ret = 0;
 	struct platform_device *samsung_bl_device;
+	struct samsung_bl_drvdata *samsung_bl_drvdata;
 	struct platform_pwm_backlight_data *samsung_bl_data;
 
 	samsung_bl_device = kmemdup(&samsung_dfl_bl_device,
@@ -91,17 +99,19 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 		return;
 	}
 
-	samsung_bl_data = s3c_set_platdata(&samsung_dfl_bl_data,
-		sizeof(struct platform_pwm_backlight_data), samsung_bl_device);
-	if (!samsung_bl_data) {
+	samsung_bl_drvdata = kmemdup(&samsung_dfl_bl_data,
+				sizeof(samsung_dfl_bl_data), GFP_KERNEL);
+	if (!samsung_bl_drvdata) {
 		printk(KERN_ERR "%s: no memory for platform dev\n", __func__);
 		goto err_data;
 	}
+	samsung_bl_device->dev.platform_data = &samsung_bl_drvdata->plat_data;
+	samsung_bl_drvdata->gpio_info = gpio_info;
+	samsung_bl_data = &samsung_bl_drvdata->plat_data;
 
 	/* Copy board specific data provided by user */
 	samsung_bl_data->pwm_id = bl_data->pwm_id;
-	samsung_bl_device->dev.parent =
-			&s3c_device_timer[samsung_bl_data->pwm_id].dev;
+	samsung_bl_device->dev.parent = &samsung_device_pwm.dev;
 
 	if (bl_data->max_brightness)
 		samsung_bl_data->max_brightness = bl_data->max_brightness;
@@ -122,17 +132,6 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 	if (bl_data->check_fb)
 		samsung_bl_data->check_fb = bl_data->check_fb;
 
-	/* Keep the GPIO info for future use */
-	s3c_device_timer[samsung_bl_data->pwm_id].dev.platform_data = gpio_info;
-
-	/* Register the specific PWM timer dev for Backlight control */
-	ret = platform_device_register(
-			&s3c_device_timer[samsung_bl_data->pwm_id]);
-	if (ret) {
-		printk(KERN_ERR "failed to register pwm timer for backlight: %d\n", ret);
-		goto err_plat_reg1;
-	}
-
 	/* Register the Backlight dev */
 	ret = platform_device_register(samsung_bl_device);
 	if (ret) {
@@ -143,8 +142,6 @@ void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 	return;
 
 err_plat_reg2:
-	platform_device_unregister(&s3c_device_timer[samsung_bl_data->pwm_id]);
-err_plat_reg1:
 	kfree(samsung_bl_data);
 err_data:
 	kfree(samsung_bl_device);
diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
index 0f9c3f431a5f..8ce0ac007eb9 100644
--- a/arch/arm/plat-samsung/devs.c
+++ b/arch/arm/plat-samsung/devs.c
@@ -58,6 +58,7 @@
 #include <plat/keypad.h>
 #include <linux/platform_data/mmc-s3cmci.h>
 #include <linux/platform_data/mtd-nand-s3c2410.h>
+#include <plat/pwm-core.h>
 #include <plat/sdhci.h>
 #include <linux/platform_data/touchscreen-s3c2410.h>
 #include <linux/platform_data/usb-s3c2410_udc.h>
@@ -1097,36 +1098,21 @@ arch_initcall(s5p_pmu_init);
 /* PWM Timer */
 
 #ifdef CONFIG_SAMSUNG_DEV_PWM
+static struct resource samsung_pwm_resource[] = {
+	DEFINE_RES_MEM(SAMSUNG_PA_TIMER, SZ_4K),
+};
 
-#define TIMER_RESOURCE_SIZE (1)
-
-#define TIMER_RESOURCE(_tmr, _irq)			\
-	(struct resource [TIMER_RESOURCE_SIZE]) {	\
-		[0] = {					\
-			.start	= _irq,			\
-			.end	= _irq,			\
-			.flags	= IORESOURCE_IRQ	\
-		}					\
-	}
-
-#define DEFINE_S3C_TIMER(_tmr_no, _irq)			\
-	.name		= "s3c24xx-pwm",		\
-	.id		= _tmr_no,			\
-	.num_resources	= TIMER_RESOURCE_SIZE,		\
-	.resource	= TIMER_RESOURCE(_tmr_no, _irq),	\
-
-/*
- * since we already have an static mapping for the timer,
- * we do not bother setting any IO resource for the base.
- */
-
-struct platform_device s3c_device_timer[] = {
-	[0] = { DEFINE_S3C_TIMER(0, IRQ_TIMER0) },
-	[1] = { DEFINE_S3C_TIMER(1, IRQ_TIMER1) },
-	[2] = { DEFINE_S3C_TIMER(2, IRQ_TIMER2) },
-	[3] = { DEFINE_S3C_TIMER(3, IRQ_TIMER3) },
-	[4] = { DEFINE_S3C_TIMER(4, IRQ_TIMER4) },
+struct platform_device samsung_device_pwm = {
+	.name		= "samsung-pwm",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(samsung_pwm_resource),
+	.resource	= samsung_pwm_resource,
 };
+
+void __init samsung_pwm_set_platdata(struct samsung_pwm_variant *pd)
+{
+	samsung_device_pwm.dev.platform_data = pd;
+}
 #endif /* CONFIG_SAMSUNG_DEV_PWM */
 
 /* RTC */
diff --git a/arch/arm/plat-samsung/include/plat/clock.h b/arch/arm/plat-samsung/include/plat/clock.h
index a62753dc15ba..63239f409807 100644
--- a/arch/arm/plat-samsung/include/plat/clock.h
+++ b/arch/arm/plat-samsung/include/plat/clock.h
@@ -83,6 +83,11 @@ extern struct clk clk_ext;
 extern struct clksrc_clk clk_epllref;
 extern struct clksrc_clk clk_esysclk;
 
+/* S3C24XX UART clocks */
+extern struct clk s3c24xx_clk_uart0;
+extern struct clk s3c24xx_clk_uart1;
+extern struct clk s3c24xx_clk_uart2;
+
 /* S3C64XX specific clocks */
 extern struct clk clk_h2;
 extern struct clk clk_27m;
@@ -140,10 +145,6 @@ extern int s3c2443_clkcon_enable_s(struct clk *clk, int enable);
 
 extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
 
-/* Init for pwm clock code */
-
-extern void s3c_pwmclk_init(void);
-
 /* Global watchdog clock used by arch_wtd_reset() callback */
 
 extern struct clk *s3c2410_wdtclk;
diff --git a/arch/arm/plat-samsung/include/plat/cpu-freq-core.h b/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
index 95509d8eb140..7231c8e4975e 100644
--- a/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
+++ b/arch/arm/plat-samsung/include/plat/cpu-freq-core.h
@@ -202,7 +202,7 @@ extern int s3c_plltab_register(struct cpufreq_frequency_table *plls,
 extern struct s3c_cpufreq_config *s3c_cpufreq_getconfig(void);
 extern struct s3c_iotimings *s3c_cpufreq_getiotimings(void);
 
-#ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUGFS
+#ifdef CONFIG_ARM_S3C24XX_CPUFREQ_DEBUGFS
 #define s3c_cpufreq_debugfs_call(x) x
 #else
 #define s3c_cpufreq_debugfs_call(x) NULL
@@ -259,17 +259,17 @@ extern void s3c2412_iotiming_set(struct s3c_cpufreq_config *cfg,
 #define s3c2412_iotiming_set NULL
 #endif /* CONFIG_S3C2412_IOTIMING */
 
-#ifdef CONFIG_CPU_FREQ_S3C24XX_DEBUG
+#ifdef CONFIG_ARM_S3C24XX_CPUFREQ_DEBUG
 #define s3c_freq_dbg(x...) printk(KERN_INFO x)
 #else
 #define s3c_freq_dbg(x...) do { if (0) printk(x); } while (0)
-#endif /* CONFIG_CPU_FREQ_S3C24XX_DEBUG */
+#endif /* CONFIG_ARM_S3C24XX_CPUFREQ_DEBUG */
 
-#ifdef CONFIG_CPU_FREQ_S3C24XX_IODEBUG
+#ifdef CONFIG_ARM_S3C24XX_CPUFREQ_IODEBUG
 #define s3c_freq_iodbg(x...) printk(KERN_INFO x)
 #else
 #define s3c_freq_iodbg(x...) do { if (0) printk(x); } while (0)
-#endif /* CONFIG_CPU_FREQ_S3C24XX_IODEBUG */
+#endif /* CONFIG_ARM_S3C24XX_CPUFREQ_IODEBUG */
 
 static inline int s3c_cpufreq_addfreq(struct cpufreq_frequency_table *table,
 				      int index, size_t table_size,
@@ -285,7 +285,7 @@ static inline int s3c_cpufreq_addfreq(struct cpufreq_frequency_table *table,
 		s3c_freq_dbg("%s: { %d = %u kHz }\n",
 			     __func__, index, freq);
 
-		table[index].index = index;
+		table[index].driver_data = index;
 		table[index].frequency = freq;
 	}
 
diff --git a/arch/arm/plat-samsung/include/plat/cpu-freq.h b/arch/arm/plat-samsung/include/plat/cpu-freq.h
index 80c4a809c721..85517ab962ae 100644
--- a/arch/arm/plat-samsung/include/plat/cpu-freq.h
+++ b/arch/arm/plat-samsung/include/plat/cpu-freq.h
@@ -126,7 +126,7 @@ struct s3c_cpufreq_board {
 };
 
 /* Things depending on frequency scaling. */
-#ifdef CONFIG_CPU_FREQ_S3C
+#ifdef CONFIG_ARM_S3C_CPUFREQ
 #define __init_or_cpufreq
 #else
 #define __init_or_cpufreq __init
@@ -134,7 +134,7 @@ struct s3c_cpufreq_board {
 
 /* Board functions */
 
-#ifdef CONFIG_CPU_FREQ_S3C
+#ifdef CONFIG_ARM_S3C_CPUFREQ
 extern int s3c_cpufreq_setboard(struct s3c_cpufreq_board *board);
 #else
 
@@ -142,4 +142,4 @@ static inline int s3c_cpufreq_setboard(struct s3c_cpufreq_board *board)
 {
 	return 0;
 }
-#endif  /* CONFIG_CPU_FREQ_S3C */
+#endif  /* CONFIG_ARM_S3C_CPUFREQ */
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index 989fefe18be6..4fb1f03a10d1 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -46,6 +46,7 @@ extern unsigned long samsung_cpu_id;
 #define EXYNOS4_CPU_MASK	0xFFFE0000
 
 #define EXYNOS5250_SOC_ID	0x43520000
+#define EXYNOS5420_SOC_ID	0xE5420000
 #define EXYNOS5440_SOC_ID	0xE5440000
 #define EXYNOS5_SOC_MASK	0xFFFFF000
 
@@ -67,6 +68,7 @@ IS_SAMSUNG_CPU(exynos4210, EXYNOS4210_CPU_ID, EXYNOS4_CPU_MASK)
 IS_SAMSUNG_CPU(exynos4212, EXYNOS4212_CPU_ID, EXYNOS4_CPU_MASK)
 IS_SAMSUNG_CPU(exynos4412, EXYNOS4412_CPU_ID, EXYNOS4_CPU_MASK)
 IS_SAMSUNG_CPU(exynos5250, EXYNOS5250_SOC_ID, EXYNOS5_SOC_MASK)
+IS_SAMSUNG_CPU(exynos5420, EXYNOS5420_SOC_ID, EXYNOS5_SOC_MASK)
 IS_SAMSUNG_CPU(exynos5440, EXYNOS5440_SOC_ID, EXYNOS5_SOC_MASK)
 
 #if defined(CONFIG_CPU_S3C2410) || defined(CONFIG_CPU_S3C2412) || \
@@ -142,6 +144,12 @@ IS_SAMSUNG_CPU(exynos5440, EXYNOS5440_SOC_ID, EXYNOS5_SOC_MASK)
 # define soc_is_exynos5250()	0
 #endif
 
+#if defined(CONFIG_SOC_EXYNOS5420)
+# define soc_is_exynos5420()	is_samsung_exynos5420()
+#else
+# define soc_is_exynos5420()	0
+#endif
+
 #if defined(CONFIG_SOC_EXYNOS5440)
 # define soc_is_exynos5440()	is_samsung_exynos5440()
 #else
diff --git a/arch/arm/plat-samsung/include/plat/devs.h b/arch/arm/plat-samsung/include/plat/devs.h
index 87d501ff3328..0dc4ac4909b0 100644
--- a/arch/arm/plat-samsung/include/plat/devs.h
+++ b/arch/arm/plat-samsung/include/plat/devs.h
@@ -134,6 +134,7 @@ extern struct platform_device exynos4_device_spdif;
 
 extern struct platform_device samsung_asoc_idma;
 extern struct platform_device samsung_device_keypad;
+extern struct platform_device samsung_device_pwm;
 
 /* s3c2440 specific devices */
 
diff --git a/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h b/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
index d01576318b2c..bd3a6db14cbb 100644
--- a/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
+++ b/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
@@ -28,7 +28,6 @@ struct s3c24xx_dma_map {
 	const char		*name;
 
 	unsigned long		 channels[S3C_DMA_CHANNELS];
-	unsigned long		 channels_rx[S3C_DMA_CHANNELS];
 };
 
 struct s3c24xx_dma_selection {
@@ -38,10 +37,6 @@ struct s3c24xx_dma_selection {
 
 	void	(*select)(struct s3c2410_dma_chan *chan,
 			  struct s3c24xx_dma_map *map);
-
-	void	(*direction)(struct s3c2410_dma_chan *chan,
-			     struct s3c24xx_dma_map *map,
-			     enum dma_data_direction dir);
 };
 
 extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);
diff --git a/arch/arm/plat-samsung/include/plat/irq-vic-timer.h b/arch/arm/plat-samsung/include/plat/irq-vic-timer.h
deleted file mode 100644
index 5b9c42fd32d7..000000000000
--- a/arch/arm/plat-samsung/include/plat/irq-vic-timer.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* arch/arm/plat-samsung/include/plat/irq-vic-timer.h
- *
- * Copyright (c) 2010 Simtec Electronics
- *	Ben Dooks <ben@simtec.co.uk>
- *
- * Header file for Samsung SoC IRQ VIC timer
- *
- * 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.
-*/
-
-extern void s3c_init_vic_timer_irq(unsigned int num, unsigned int timer_irq);
diff --git a/arch/arm/plat-samsung/include/plat/irqs.h b/arch/arm/plat-samsung/include/plat/irqs.h
index df46b776976a..039001c0ef05 100644
--- a/arch/arm/plat-samsung/include/plat/irqs.h
+++ b/arch/arm/plat-samsung/include/plat/irqs.h
@@ -44,15 +44,6 @@
 #define S5P_IRQ_VIC2(x)		(S5P_VIC2_BASE + (x))
 #define S5P_IRQ_VIC3(x)		(S5P_VIC3_BASE + (x))
 
-#define S5P_TIMER_IRQ(x)	(IRQ_TIMER_BASE + (x))
-
-#define IRQ_TIMER0		S5P_TIMER_IRQ(0)
-#define IRQ_TIMER1		S5P_TIMER_IRQ(1)
-#define IRQ_TIMER2		S5P_TIMER_IRQ(2)
-#define IRQ_TIMER3		S5P_TIMER_IRQ(3)
-#define IRQ_TIMER4		S5P_TIMER_IRQ(4)
-#define IRQ_TIMER_COUNT		(5)
-
 #define IRQ_EINT(x)		((x) < 16 ? ((x) + S5P_EINT_BASE1) \
 					: ((x) - 16 + S5P_EINT_BASE2))
 
diff --git a/arch/arm/plat-samsung/include/plat/pm.h b/arch/arm/plat-samsung/include/plat/pm.h
index f6fcadeee969..6bc1a8f471e3 100644
--- a/arch/arm/plat-samsung/include/plat/pm.h
+++ b/arch/arm/plat-samsung/include/plat/pm.h
@@ -19,7 +19,7 @@
 
 struct device;
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_SAMSUNG_PM
 
 extern __init int s3c_pm_init(void);
 extern __init int s3c64xx_pm_init(void);
@@ -58,8 +58,6 @@ extern unsigned char pm_uart_udivslot;  /* true to save UART UDIVSLOT */
 
 /* from sleep.S */
 
-extern void s3c_cpu_resume(void);
-
 extern int s3c2410_cpu_suspend(unsigned long);
 
 /* sleep save info */
@@ -106,12 +104,14 @@ extern void s3c_pm_do_save(struct sleep_save *ptr, int count);
 extern void s3c_pm_do_restore(struct sleep_save *ptr, int count);
 extern void s3c_pm_do_restore_core(struct sleep_save *ptr, int count);
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_SAMSUNG_PM
 extern int s3c_irq_wake(struct irq_data *data, unsigned int state);
 extern int s3c_irqext_wake(struct irq_data *data, unsigned int state);
+extern void s3c_cpu_resume(void);
 #else
 #define s3c_irq_wake NULL
 #define s3c_irqext_wake NULL
+#define s3c_cpu_resume NULL
 #endif
 
 /* PM debug functions */
@@ -166,6 +166,7 @@ extern void s3c_pm_check_store(void);
  */
 extern void s3c_pm_configure_extint(void);
 
+#ifdef CONFIG_GPIO_SAMSUNG
 /**
  * samsung_pm_restore_gpios() - restore the state of the gpios after sleep.
  *
@@ -181,6 +182,10 @@ extern void samsung_pm_restore_gpios(void);
  * Save the GPIO states for resotration on resume. See samsung_pm_restore_gpios().
  */
 extern void samsung_pm_save_gpios(void);
+#else
+static inline void samsung_pm_restore_gpios(void) {}
+static inline void samsung_pm_save_gpios(void) {}
+#endif
 
 extern void s3c_pm_save_core(void);
 extern void s3c_pm_restore_core(void);
diff --git a/arch/arm/plat-samsung/include/plat/pwm-clock.h b/arch/arm/plat-samsung/include/plat/pwm-clock.h
deleted file mode 100644
index bf6a60eb6237..000000000000
--- a/arch/arm/plat-samsung/include/plat/pwm-clock.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/* linux/arch/arm/plat-samsung/include/plat/pwm-clock.h
- *
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- *
- * Copyright 2008 Openmoko, Inc.
- * Copyright 2008 Simtec Electronics
- *      Ben Dooks <ben@simtec.co.uk>
- *      http://armlinux.simtec.co.uk/
- *
- * SAMSUNG - pwm clock and timer support
- *
- * 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 __ASM_PLAT_PWM_CLOCK_H
-#define __ASM_PLAT_PWM_CLOCK_H __FILE__
-
-/**
- * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
- * @tcfg: The timer TCFG1 register bits shifted down to 0.
- *
- * Return true if the given configuration from TCFG1 is a TCLK instead
- * any of the TDIV clocks.
- */
-static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
-{
-	if (soc_is_s3c24xx())
-		return tcfg == S3C2410_TCFG1_MUX_TCLK;
-	else if (soc_is_s3c64xx() || soc_is_s5pc100())
-		return tcfg >= S3C64XX_TCFG1_MUX_TCLK;
-	else if (soc_is_s5p6440() || soc_is_s5p6450())
-		return 0;
-	else
-		return tcfg == S3C64XX_TCFG1_MUX_TCLK;
-}
-
-/**
- * tcfg_to_divisor() - convert tcfg1 setting to a divisor
- * @tcfg1: The tcfg1 setting, shifted down.
- *
- * Get the divisor value for the given tcfg1 setting. We assume the
- * caller has already checked to see if this is not a TCLK source.
- */
-static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
-{
-	if (soc_is_s3c24xx())
-		return 1 << (tcfg1 + 1);
-	else
-		return 1 << tcfg1;
-}
-
-/**
- * pwm_tdiv_has_div1() - does the tdiv setting have a /1
- *
- * Return true if we have a /1 in the tdiv setting.
- */
-static inline unsigned int pwm_tdiv_has_div1(void)
-{
-	if (soc_is_s3c24xx())
-		return 0;
-	else
-		return 1;
-}
-
-/**
- * pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
- * @div: The divisor to calculate the bit information for.
- *
- * Turn a divisor into the necessary bit field for TCFG1.
- */
-static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
-{
-	if (soc_is_s3c24xx())
-		return ilog2(div) - 1;
-	else
-		return ilog2(div);
-}
-#endif /* __ASM_PLAT_PWM_CLOCK_H */
diff --git a/arch/arm/plat-samsung/include/plat/pwm-core.h b/arch/arm/plat-samsung/include/plat/pwm-core.h
new file mode 100644
index 000000000000..5bff1facb672
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/pwm-core.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2013 Tomasz Figa <tomasz.figa@gmail.com>
+ *
+ * Samsung PWM controller platform data helpers.
+ *
+ * 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 __ASM_ARCH_PWM_CORE_H
+#define __ASM_ARCH_PWM_CORE_H __FILE__
+
+#include <clocksource/samsung_pwm.h>
+
+#ifdef CONFIG_SAMSUNG_DEV_PWM
+extern void samsung_pwm_set_platdata(struct samsung_pwm_variant *pd);
+#else
+static inline void samsung_pwm_set_platdata(struct samsung_pwm_variant *pd) { }
+#endif
+
+#endif /* __ASM_ARCH_PWM_CORE_H */
diff --git a/arch/arm/plat-samsung/include/plat/regs-timer.h b/arch/arm/plat-samsung/include/plat/regs-timer.h
deleted file mode 100644
index d097d92f8cc7..000000000000
--- a/arch/arm/plat-samsung/include/plat/regs-timer.h
+++ /dev/null
@@ -1,124 +0,0 @@
-/* arch/arm/mach-s3c2410/include/mach/regs-timer.h
- *
- * Copyright (c) 2003 Simtec Electronics <linux@simtec.co.uk>
- *		      http://www.simtec.co.uk/products/SWLINUX/
- *
- * 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.
- *
- * S3C2410 Timer configuration
-*/
-
-#ifndef __ASM_ARCH_REGS_TIMER_H
-#define __ASM_ARCH_REGS_TIMER_H
-
-#define S3C_TIMERREG(x) (S3C_VA_TIMER + (x))
-#define S3C_TIMERREG2(tmr,reg) S3C_TIMERREG((reg)+0x0c+((tmr)*0x0c))
-
-#define S3C2410_TCFG0	      S3C_TIMERREG(0x00)
-#define S3C2410_TCFG1	      S3C_TIMERREG(0x04)
-#define S3C2410_TCON	      S3C_TIMERREG(0x08)
-
-#define S3C64XX_TINT_CSTAT    S3C_TIMERREG(0x44)
-
-#define S3C2410_TCFG_PRESCALER0_MASK (255<<0)
-#define S3C2410_TCFG_PRESCALER1_MASK (255<<8)
-#define S3C2410_TCFG_PRESCALER1_SHIFT (8)
-#define S3C2410_TCFG_DEADZONE_MASK   (255<<16)
-#define S3C2410_TCFG_DEADZONE_SHIFT  (16)
-
-#define S3C2410_TCFG1_MUX4_DIV2	  (0<<16)
-#define S3C2410_TCFG1_MUX4_DIV4	  (1<<16)
-#define S3C2410_TCFG1_MUX4_DIV8	  (2<<16)
-#define S3C2410_TCFG1_MUX4_DIV16  (3<<16)
-#define S3C2410_TCFG1_MUX4_TCLK1  (4<<16)
-#define S3C2410_TCFG1_MUX4_MASK	  (15<<16)
-#define S3C2410_TCFG1_MUX4_SHIFT  (16)
-
-#define S3C2410_TCFG1_MUX3_DIV2	  (0<<12)
-#define S3C2410_TCFG1_MUX3_DIV4	  (1<<12)
-#define S3C2410_TCFG1_MUX3_DIV8	  (2<<12)
-#define S3C2410_TCFG1_MUX3_DIV16  (3<<12)
-#define S3C2410_TCFG1_MUX3_TCLK1  (4<<12)
-#define S3C2410_TCFG1_MUX3_MASK	  (15<<12)
-
-
-#define S3C2410_TCFG1_MUX2_DIV2	  (0<<8)
-#define S3C2410_TCFG1_MUX2_DIV4	  (1<<8)
-#define S3C2410_TCFG1_MUX2_DIV8	  (2<<8)
-#define S3C2410_TCFG1_MUX2_DIV16  (3<<8)
-#define S3C2410_TCFG1_MUX2_TCLK1  (4<<8)
-#define S3C2410_TCFG1_MUX2_MASK	  (15<<8)
-
-
-#define S3C2410_TCFG1_MUX1_DIV2	  (0<<4)
-#define S3C2410_TCFG1_MUX1_DIV4	  (1<<4)
-#define S3C2410_TCFG1_MUX1_DIV8	  (2<<4)
-#define S3C2410_TCFG1_MUX1_DIV16  (3<<4)
-#define S3C2410_TCFG1_MUX1_TCLK0  (4<<4)
-#define S3C2410_TCFG1_MUX1_MASK	  (15<<4)
-
-#define S3C2410_TCFG1_MUX0_DIV2	  (0<<0)
-#define S3C2410_TCFG1_MUX0_DIV4	  (1<<0)
-#define S3C2410_TCFG1_MUX0_DIV8	  (2<<0)
-#define S3C2410_TCFG1_MUX0_DIV16  (3<<0)
-#define S3C2410_TCFG1_MUX0_TCLK0  (4<<0)
-#define S3C2410_TCFG1_MUX0_MASK	  (15<<0)
-
-#define S3C2410_TCFG1_MUX_DIV2	  (0<<0)
-#define S3C2410_TCFG1_MUX_DIV4	  (1<<0)
-#define S3C2410_TCFG1_MUX_DIV8	  (2<<0)
-#define S3C2410_TCFG1_MUX_DIV16   (3<<0)
-#define S3C2410_TCFG1_MUX_TCLK    (4<<0)
-#define S3C2410_TCFG1_MUX_MASK	  (15<<0)
-
-#define S3C64XX_TCFG1_MUX_DIV1	  (0<<0)
-#define S3C64XX_TCFG1_MUX_DIV2	  (1<<0)
-#define S3C64XX_TCFG1_MUX_DIV4	  (2<<0)
-#define S3C64XX_TCFG1_MUX_DIV8    (3<<0)
-#define S3C64XX_TCFG1_MUX_DIV16   (4<<0)
-#define S3C64XX_TCFG1_MUX_TCLK    (5<<0)  /* 3 sets of TCLK */
-#define S3C64XX_TCFG1_MUX_MASK	  (15<<0)
-
-#define S3C2410_TCFG1_SHIFT(x)	  ((x) * 4)
-
-/* for each timer, we have an count buffer, an compare buffer and
- * an observation buffer
-*/
-
-/* WARNING - timer 4 has no buffer reg, and it's observation is at +4 */
-
-#define S3C2410_TCNTB(tmr)    S3C_TIMERREG2(tmr, 0x00)
-#define S3C2410_TCMPB(tmr)    S3C_TIMERREG2(tmr, 0x04)
-#define S3C2410_TCNTO(tmr)    S3C_TIMERREG2(tmr, (((tmr) == 4) ? 0x04 : 0x08))
-
-#define S3C2410_TCON_T4RELOAD	  (1<<22)
-#define S3C2410_TCON_T4MANUALUPD  (1<<21)
-#define S3C2410_TCON_T4START	  (1<<20)
-
-#define S3C2410_TCON_T3RELOAD	  (1<<19)
-#define S3C2410_TCON_T3INVERT	  (1<<18)
-#define S3C2410_TCON_T3MANUALUPD  (1<<17)
-#define S3C2410_TCON_T3START	  (1<<16)
-
-#define S3C2410_TCON_T2RELOAD	  (1<<15)
-#define S3C2410_TCON_T2INVERT	  (1<<14)
-#define S3C2410_TCON_T2MANUALUPD  (1<<13)
-#define S3C2410_TCON_T2START	  (1<<12)
-
-#define S3C2410_TCON_T1RELOAD	  (1<<11)
-#define S3C2410_TCON_T1INVERT	  (1<<10)
-#define S3C2410_TCON_T1MANUALUPD  (1<<9)
-#define S3C2410_TCON_T1START	  (1<<8)
-
-#define S3C2410_TCON_T0DEADZONE	  (1<<4)
-#define S3C2410_TCON_T0RELOAD	  (1<<3)
-#define S3C2410_TCON_T0INVERT	  (1<<2)
-#define S3C2410_TCON_T0MANUALUPD  (1<<1)
-#define S3C2410_TCON_T0START	  (1<<0)
-
-#endif /*  __ASM_ARCH_REGS_TIMER_H */
-
-
-
diff --git a/arch/arm/plat-samsung/include/plat/regs-watchdog.h b/arch/arm/plat-samsung/include/plat/regs-watchdog.h
deleted file mode 100644
index 4938492470f7..000000000000
--- a/arch/arm/plat-samsung/include/plat/regs-watchdog.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/* arch/arm/mach-s3c2410/include/mach/regs-watchdog.h
- *
- * Copyright (c) 2003 Simtec Electronics <linux@simtec.co.uk>
- *		      http://www.simtec.co.uk/products/SWLINUX/
- *
- * 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.
- *
- * S3C2410 Watchdog timer control
-*/
-
-
-#ifndef __ASM_ARCH_REGS_WATCHDOG_H
-#define __ASM_ARCH_REGS_WATCHDOG_H
-
-#define S3C_WDOGREG(x) ((x) + S3C_VA_WATCHDOG)
-
-#define S3C2410_WTCON	   S3C_WDOGREG(0x00)
-#define S3C2410_WTDAT	   S3C_WDOGREG(0x04)
-#define S3C2410_WTCNT	   S3C_WDOGREG(0x08)
-
-/* the watchdog can either generate a reset pulse, or an
- * interrupt.
- */
-
-#define S3C2410_WTCON_RSTEN   (0x01)
-#define S3C2410_WTCON_INTEN   (1<<2)
-#define S3C2410_WTCON_ENABLE  (1<<5)
-
-#define S3C2410_WTCON_DIV16   (0<<3)
-#define S3C2410_WTCON_DIV32   (1<<3)
-#define S3C2410_WTCON_DIV64   (2<<3)
-#define S3C2410_WTCON_DIV128  (3<<3)
-
-#define S3C2410_WTCON_PRESCALE(x) ((x) << 8)
-#define S3C2410_WTCON_PRESCALE_MASK (0xff00)
-
-#endif /* __ASM_ARCH_REGS_WATCHDOG_H */
-
-
diff --git a/arch/arm/plat-samsung/include/plat/samsung-time.h b/arch/arm/plat-samsung/include/plat/samsung-time.h
index 4cc99bb1f176..209464adef97 100644
--- a/arch/arm/plat-samsung/include/plat/samsung-time.h
+++ b/arch/arm/plat-samsung/include/plat/samsung-time.h
@@ -22,29 +22,6 @@ enum samsung_timer_mode {
 	SAMSUNG_PWM4,
 };
 
-struct samsung_timer_source {
-	unsigned int event_id;
-	unsigned int source_id;
-};
-
-/* Be able to sleep for atleast 4 seconds (usually more) */
-#define SAMSUNG_TIMER_MIN_RANGE	4
-
-#if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S5PC100)
-#define TCNT_MAX		0xffff
-#define TSCALER_DIV		25
-#define TDIV			50
-#define TSIZE			16
-#else
-#define TCNT_MAX		0xffffffff
-#define TSCALER_DIV		2
-#define TDIV			2
-#define TSIZE			32
-#endif
-
-#define NON_PERIODIC		0
-#define PERIODIC		1
-
 extern void __init samsung_set_timer_source(enum samsung_timer_mode event,
 					enum samsung_timer_mode source);
 
diff --git a/arch/arm/plat-samsung/include/plat/sdhci.h b/arch/arm/plat-samsung/include/plat/sdhci.h
index ce1d0f785efd..bf650218b40e 100644
--- a/arch/arm/plat-samsung/include/plat/sdhci.h
+++ b/arch/arm/plat-samsung/include/plat/sdhci.h
@@ -260,44 +260,6 @@ static inline void s5pv210_default_sdhci3(void) { }
 
 #endif /* CONFIG_S5PV210_SETUP_SDHCI */
 
-/* EXYNOS4 SDHCI setup */
-#ifdef CONFIG_EXYNOS4_SETUP_SDHCI
-static inline void exynos4_default_sdhci0(void)
-{
-#ifdef CONFIG_S3C_DEV_HSMMC
-	s3c_hsmmc0_def_platdata.cfg_gpio = exynos4_setup_sdhci0_cfg_gpio;
-#endif
-}
-
-static inline void exynos4_default_sdhci1(void)
-{
-#ifdef CONFIG_S3C_DEV_HSMMC1
-	s3c_hsmmc1_def_platdata.cfg_gpio = exynos4_setup_sdhci1_cfg_gpio;
-#endif
-}
-
-static inline void exynos4_default_sdhci2(void)
-{
-#ifdef CONFIG_S3C_DEV_HSMMC2
-	s3c_hsmmc2_def_platdata.cfg_gpio = exynos4_setup_sdhci2_cfg_gpio;
-#endif
-}
-
-static inline void exynos4_default_sdhci3(void)
-{
-#ifdef CONFIG_S3C_DEV_HSMMC3
-	s3c_hsmmc3_def_platdata.cfg_gpio = exynos4_setup_sdhci3_cfg_gpio;
-#endif
-}
-
-#else
-static inline void exynos4_default_sdhci0(void) { }
-static inline void exynos4_default_sdhci1(void) { }
-static inline void exynos4_default_sdhci2(void) { }
-static inline void exynos4_default_sdhci3(void) { }
-
-#endif /* CONFIG_EXYNOS4_SETUP_SDHCI */
-
 static inline void s3c_sdhci_setname(int id, char *name)
 {
 	switch (id) {
diff --git a/arch/arm/plat-samsung/include/plat/uncompress.h b/arch/arm/plat-samsung/include/plat/uncompress.h
index 02b66d723d1a..4afc32f90b6d 100644
--- a/arch/arm/plat-samsung/include/plat/uncompress.h
+++ b/arch/arm/plat-samsung/include/plat/uncompress.h
@@ -21,6 +21,8 @@ typedef unsigned int upf_t;	/* cannot include linux/serial_core.h */
 unsigned int fifo_mask;
 unsigned int fifo_max;
 
+volatile u8 *uart_base;
+
 /* forward declerations */
 
 static void arch_detect_cpu(void);
@@ -28,19 +30,24 @@ static void arch_detect_cpu(void);
 /* defines for UART registers */
 
 #include <plat/regs-serial.h>
-#include <plat/regs-watchdog.h>
 
 /* working in physical space... */
-#undef S3C2410_WDOGREG
-#define S3C2410_WDOGREG(x) ((S3C24XX_PA_WATCHDOG + (x)))
+#define S3C_WDOGREG(x)	((S3C_PA_WDT + (x)))
+
+#define S3C2410_WTCON	S3C_WDOGREG(0x00)
+#define S3C2410_WTDAT	S3C_WDOGREG(0x04)
+#define S3C2410_WTCNT	S3C_WDOGREG(0x08)
+
+#define S3C2410_WTCON_RSTEN	(1 << 0)
+#define S3C2410_WTCON_ENABLE	(1 << 5)
+
+#define S3C2410_WTCON_DIV128	(3 << 3)
+
+#define S3C2410_WTCON_PRESCALE(x)	((x) << 8)
 
 /* how many bytes we allow into the FIFO at a time in FIFO mode */
 #define FIFO_MAX	 (14)
 
-#ifdef S3C_PA_UART
-#define uart_base S3C_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT)
-#endif
-
 static __inline__ void
 uart_wr(unsigned int reg, unsigned int val)
 {
diff --git a/arch/arm/plat-samsung/include/plat/watchdog-reset.h b/arch/arm/plat-samsung/include/plat/watchdog-reset.h
index bc4db9b04e36..0386b8f76623 100644
--- a/arch/arm/plat-samsung/include/plat/watchdog-reset.h
+++ b/arch/arm/plat-samsung/include/plat/watchdog-reset.h
@@ -10,37 +10,11 @@
  * published by the Free Software Foundation.
 */
 
-#include <plat/clock.h>
-#include <plat/regs-watchdog.h>
-#include <mach/map.h>
+#ifndef __PLAT_SAMSUNG_WATCHDOG_RESET_H
+#define __PLAT_SAMSUNG_WATCHDOG_RESET_H
 
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/delay.h>
+extern void samsung_wdt_reset(void);
+extern void samsung_wdt_reset_of_init(void);
+extern void samsung_wdt_reset_init(void __iomem *base);
 
-static inline void arch_wdt_reset(void)
-{
-	printk("arch_reset: attempting watchdog reset\n");
-
-	__raw_writel(0, S3C2410_WTCON);	  /* disable watchdog, to be safe  */
-
-	if (!IS_ERR(s3c2410_wdtclk))
-		clk_enable(s3c2410_wdtclk);
-
-	/* put initial values into count and data */
-	__raw_writel(0x80, S3C2410_WTCNT);
-	__raw_writel(0x80, S3C2410_WTDAT);
-
-	/* set the watchdog to go and reset... */
-	__raw_writel(S3C2410_WTCON_ENABLE|S3C2410_WTCON_DIV16|S3C2410_WTCON_RSTEN |
-		     S3C2410_WTCON_PRESCALE(0x20), S3C2410_WTCON);
-
-	/* wait for reset to assert... */
-	mdelay(500);
-
-	printk(KERN_ERR "Watchdog reset failed to assert reset\n");
-
-	/* delay to allow the serial port to show the message */
-	mdelay(50);
-}
+#endif /* __PLAT_SAMSUNG_WATCHDOG_RESET_H */
diff --git a/arch/arm/plat-samsung/init.c b/arch/arm/plat-samsung/init.c
index 79d10fca9090..50a3ea0037db 100644
--- a/arch/arm/plat-samsung/init.c
+++ b/arch/arm/plat-samsung/init.c
@@ -55,12 +55,13 @@ void __init s3c_init_cpu(unsigned long idcode,
 
 	printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode);
 
-	if (cpu->map_io == NULL || cpu->init == NULL) {
+	if (cpu->init == NULL) {
 		printk(KERN_ERR "CPU %s support not enabled\n", cpu->name);
 		panic("Unsupported Samsung CPU");
 	}
 
-	cpu->map_io();
+	if (cpu->map_io)
+		cpu->map_io();
 }
 
 /* s3c24xx_init_clocks
@@ -87,7 +88,7 @@ void __init s3c24xx_init_clocks(int xtal)
 }
 
 /* uart management */
-
+#if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
 static int nr_uarts __initdata = 0;
 
 static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS];
@@ -134,11 +135,12 @@ void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
 	if (cpu == NULL)
 		return;
 
-	if (cpu->init_uarts == NULL) {
+	if (cpu->init_uarts == NULL && IS_ENABLED(CONFIG_SAMSUNG_ATAGS)) {
 		printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
 	} else
 		(cpu->init_uarts)(cfg, no);
 }
+#endif
 
 static int __init s3c_arch_init(void)
 {
@@ -152,8 +154,9 @@ static int __init s3c_arch_init(void)
 	ret = (cpu->init)();
 	if (ret != 0)
 		return ret;
-
+#if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
 	ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts);
+#endif
 	return ret;
 }
 
diff --git a/arch/arm/plat-samsung/irq-vic-timer.c b/arch/arm/plat-samsung/irq-vic-timer.c
deleted file mode 100644
index 0fceb4273824..000000000000
--- a/arch/arm/plat-samsung/irq-vic-timer.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/* arch/arm/plat-samsung/irq-vic-timer.c
- *	originally part of arch/arm/plat-s3c64xx/irq.c
- *
- * Copyright 2008 Openmoko, Inc.
- * Copyright 2008 Simtec Electronics
- *      Ben Dooks <ben@simtec.co.uk>
- *      http://armlinux.simtec.co.uk/
- *
- * S3C64XX - Interrupt handling
- *
- * 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/interrupt.h>
-#include <linux/irq.h>
-#include <linux/irqchip/chained_irq.h>
-#include <linux/io.h>
-
-#include <mach/map.h>
-#include <mach/irqs.h>
-#include <plat/cpu.h>
-#include <plat/irq-vic-timer.h>
-#include <plat/regs-timer.h>
-
-static void s3c_irq_demux_vic_timer(unsigned int irq, struct irq_desc *desc)
-{
-	struct irq_chip *chip = irq_get_chip(irq);
-	chained_irq_enter(chip, desc);
-	generic_handle_irq((int)desc->irq_data.handler_data);
-	chained_irq_exit(chip, desc);
-}
-
-/* We assume the IRQ_TIMER0..IRQ_TIMER4 range is continuous. */
-static void s3c_irq_timer_ack(struct irq_data *d)
-{
-	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
-	u32 mask = (1 << 5) << (d->irq - gc->irq_base);
-
-	irq_reg_writel(mask | gc->mask_cache, gc->reg_base);
-}
-
-/**
- * s3c_init_vic_timer_irq() - initialise timer irq chanined off VIC.\
- * @num: Number of timers to initialize
- * @timer_irq: Base IRQ number to be used for the timers.
- *
- * Register the necessary IRQ chaining and support for the timer IRQs
- * chained of the VIC.
- */
-void __init s3c_init_vic_timer_irq(unsigned int num, unsigned int timer_irq)
-{
-	unsigned int pirq[5] = { IRQ_TIMER0_VIC, IRQ_TIMER1_VIC, IRQ_TIMER2_VIC,
-				 IRQ_TIMER3_VIC, IRQ_TIMER4_VIC };
-	struct irq_chip_generic *s3c_tgc;
-	struct irq_chip_type *ct;
-	unsigned int i;
-
-#ifdef CONFIG_ARCH_EXYNOS
-	if (soc_is_exynos5250()) {
-		pirq[0] = EXYNOS5_IRQ_TIMER0_VIC;
-		pirq[1] = EXYNOS5_IRQ_TIMER1_VIC;
-		pirq[2] = EXYNOS5_IRQ_TIMER2_VIC;
-		pirq[3] = EXYNOS5_IRQ_TIMER3_VIC;
-		pirq[4] = EXYNOS5_IRQ_TIMER4_VIC;
-	} else {
-		pirq[0] = EXYNOS4_IRQ_TIMER0_VIC;
-		pirq[1] = EXYNOS4_IRQ_TIMER1_VIC;
-		pirq[2] = EXYNOS4_IRQ_TIMER2_VIC;
-		pirq[3] = EXYNOS4_IRQ_TIMER3_VIC;
-		pirq[4] = EXYNOS4_IRQ_TIMER4_VIC;
-	}
-#endif
-	s3c_tgc = irq_alloc_generic_chip("s3c-timer", 1, timer_irq,
-					 S3C64XX_TINT_CSTAT, handle_level_irq);
-
-	if (!s3c_tgc) {
-		pr_err("%s: irq_alloc_generic_chip for IRQ %d failed\n",
-		       __func__, timer_irq);
-		return;
-	}
-
-	ct = s3c_tgc->chip_types;
-	ct->chip.irq_mask = irq_gc_mask_clr_bit;
-	ct->chip.irq_unmask = irq_gc_mask_set_bit;
-	ct->chip.irq_ack = s3c_irq_timer_ack;
-	irq_setup_generic_chip(s3c_tgc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
-			       IRQ_NOREQUEST | IRQ_NOPROBE, 0);
-	/* Clear the upper bits of the mask_cache*/
-	s3c_tgc->mask_cache &= 0x1f;
-
-	for (i = 0; i < num; i++, timer_irq++) {
-		irq_set_chained_handler(pirq[i], s3c_irq_demux_vic_timer);
-		irq_set_handler_data(pirq[i], (void *)timer_irq);
-	}
-}
diff --git a/arch/arm/plat-samsung/pm-gpio.c b/arch/arm/plat-samsung/pm-gpio.c
index c2ff92c30bdf..a8de3cfe2ee1 100644
--- a/arch/arm/plat-samsung/pm-gpio.c
+++ b/arch/arm/plat-samsung/pm-gpio.c
@@ -192,7 +192,8 @@ struct samsung_gpio_pm samsung_gpio_pm_2bit = {
 	.resume = samsung_gpio_pm_2bit_resume,
 };
 
-#if defined(CONFIG_ARCH_S3C64XX) || defined(CONFIG_PLAT_S5P)
+#if defined(CONFIG_ARCH_S3C64XX) || defined(CONFIG_PLAT_S5P) \
+	|| defined(CONFIG_ARCH_EXYNOS)
 static void samsung_gpio_pm_4bit_save(struct samsung_gpio_chip *chip)
 {
 	chip->pm_save[1] = __raw_readl(chip->base + OFFS_CON);
@@ -302,7 +303,7 @@ struct samsung_gpio_pm samsung_gpio_pm_4bit = {
 	.save	= samsung_gpio_pm_4bit_save,
 	.resume = samsung_gpio_pm_4bit_resume,
 };
-#endif /* CONFIG_ARCH_S3C64XX || CONFIG_PLAT_S5P */
+#endif /* CONFIG_ARCH_S3C64XX || CONFIG_PLAT_S5P || CONFIG_ARCH_EXYNOS */
 
 /**
  * samsung_pm_save_gpio() - save gpio chip data for suspend
diff --git a/arch/arm/plat-samsung/pm.c b/arch/arm/plat-samsung/pm.c
index 53210ec4e8ec..d0c23010b693 100644
--- a/arch/arm/plat-samsung/pm.c
+++ b/arch/arm/plat-samsung/pm.c
@@ -16,18 +16,23 @@
 #include <linux/suspend.h>
 #include <linux/errno.h>
 #include <linux/delay.h>
+#include <linux/of.h>
 #include <linux/serial_core.h>
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
 #include <asm/suspend.h>
-#include <mach/hardware.h>
-#include <mach/map.h>
 
 #include <plat/regs-serial.h>
+
+#ifdef CONFIG_SAMSUNG_ATAGS
+#include <mach/hardware.h>
+#include <mach/map.h>
 #include <mach/regs-clock.h>
 #include <mach/regs-irq.h>
 #include <mach/irqs.h>
+#endif
+
 #include <asm/irq.h>
 
 #include <plat/pm.h>
@@ -75,7 +80,7 @@ unsigned char pm_uart_udivslot;
 
 #ifdef CONFIG_SAMSUNG_PM_DEBUG
 
-static struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
+static struct pm_uart_save uart_save;
 
 static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
 {
@@ -96,11 +101,7 @@ static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
 
 static void s3c_pm_save_uarts(void)
 {
-	struct pm_uart_save *save = uart_save;
-	unsigned int uart;
-
-	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
-		s3c_pm_save_uart(uart, save);
+	s3c_pm_save_uart(CONFIG_DEBUG_S3C_UART, &uart_save);
 }
 
 static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
@@ -121,11 +122,7 @@ static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
 
 static void s3c_pm_restore_uarts(void)
 {
-	struct pm_uart_save *save = uart_save;
-	unsigned int uart;
-
-	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
-		s3c_pm_restore_uart(uart, save);
+	s3c_pm_restore_uart(CONFIG_DEBUG_S3C_UART, &uart_save);
 }
 #else
 static void s3c_pm_save_uarts(void) { }
@@ -261,7 +258,8 @@ static int s3c_pm_enter(suspend_state_t state)
 	 * require a full power-cycle)
 	*/
 
-	if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
+	if (!of_have_populated_dt() &&
+	    !any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
 	    !any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) {
 		printk(KERN_ERR "%s: No wake-up sources!\n", __func__);
 		printk(KERN_ERR "%s: Aborting sleep\n", __func__);
@@ -270,8 +268,11 @@ static int s3c_pm_enter(suspend_state_t state)
 
 	/* save all necessary core registers not covered by the drivers */
 
-	samsung_pm_save_gpios();
-	samsung_pm_saved_gpios();
+	if (!of_have_populated_dt()) {
+		samsung_pm_save_gpios();
+		samsung_pm_saved_gpios();
+	}
+
 	s3c_pm_save_uarts();
 	s3c_pm_save_core();
 
@@ -310,8 +311,11 @@ static int s3c_pm_enter(suspend_state_t state)
 
 	s3c_pm_restore_core();
 	s3c_pm_restore_uarts();
-	samsung_pm_restore_gpios();
-	s3c_pm_restored_gpios();
+
+	if (!of_have_populated_dt()) {
+		samsung_pm_restore_gpios();
+		s3c_pm_restored_gpios();
+	}
 
 	s3c_pm_debug_init();
 
diff --git a/arch/arm/plat-samsung/pwm-clock.c b/arch/arm/plat-samsung/pwm-clock.c
deleted file mode 100644
index a35ff3bcffe4..000000000000
--- a/arch/arm/plat-samsung/pwm-clock.c
+++ /dev/null
@@ -1,474 +0,0 @@
-/* linux/arch/arm/plat-s3c24xx/pwm-clock.c
- *
- * Copyright (c) 2007 Simtec Electronics
- * Copyright (c) 2007, 2008 Ben Dooks
- *	Ben Dooks <ben-linux@fluff.org>
- *
- * 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/init.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/errno.h>
-#include <linux/log2.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/io.h>
-
-#include <mach/hardware.h>
-#include <mach/map.h>
-#include <asm/irq.h>
-
-#include <plat/clock.h>
-#include <plat/cpu.h>
-
-#include <plat/regs-timer.h>
-#include <plat/pwm-clock.h>
-
-/* Each of the timers 0 through 5 go through the following
- * clock tree, with the inputs depending on the timers.
- *
- * pclk ---- [ prescaler 0 ] -+---> timer 0
- *			      +---> timer 1
- *
- * pclk ---- [ prescaler 1 ] -+---> timer 2
- *			      +---> timer 3
- *			      \---> timer 4
- *
- * Which are fed into the timers as so:
- *
- * prescaled 0 ---- [ div 2,4,8,16 ] ---\
- *				       [mux] -> timer 0
- * tclk 0 ------------------------------/
- *
- * prescaled 0 ---- [ div 2,4,8,16 ] ---\
- *				       [mux] -> timer 1
- * tclk 0 ------------------------------/
- *
- *
- * prescaled 1 ---- [ div 2,4,8,16 ] ---\
- *				       [mux] -> timer 2
- * tclk 1 ------------------------------/
- *
- * prescaled 1 ---- [ div 2,4,8,16 ] ---\
- *				       [mux] -> timer 3
- * tclk 1 ------------------------------/
- *
- * prescaled 1 ---- [ div 2,4,8, 16 ] --\
- *				       [mux] -> timer 4
- * tclk 1 ------------------------------/
- *
- * Since the mux and the divider are tied together in the
- * same register space, it is impossible to set the parent
- * and the rate at the same time. To avoid this, we add an
- * intermediate 'prescaled-and-divided' clock to select
- * as the parent for the timer input clock called tdiv.
- *
- * prescaled clk --> pwm-tdiv ---\
- *                             [ mux ] --> timer X
- * tclk -------------------------/
-*/
-
-static struct clk clk_timer_scaler[];
-
-static unsigned long clk_pwm_scaler_get_rate(struct clk *clk)
-{
-	unsigned long tcfg0 = __raw_readl(S3C2410_TCFG0);
-
-	if (clk == &clk_timer_scaler[1]) {
-		tcfg0 &= S3C2410_TCFG_PRESCALER1_MASK;
-		tcfg0 >>= S3C2410_TCFG_PRESCALER1_SHIFT;
-	} else {
-		tcfg0 &= S3C2410_TCFG_PRESCALER0_MASK;
-	}
-
-	return clk_get_rate(clk->parent) / (tcfg0 + 1);
-}
-
-static unsigned long clk_pwm_scaler_round_rate(struct clk *clk,
-					       unsigned long rate)
-{
-	unsigned long parent_rate = clk_get_rate(clk->parent);
-	unsigned long divisor = parent_rate / rate;
-
-	if (divisor > 256)
-		divisor = 256;
-	else if (divisor < 2)
-		divisor = 2;
-
-	return parent_rate / divisor;
-}
-
-static int clk_pwm_scaler_set_rate(struct clk *clk, unsigned long rate)
-{
-	unsigned long round = clk_pwm_scaler_round_rate(clk, rate);
-	unsigned long tcfg0;
-	unsigned long divisor;
-	unsigned long flags;
-
-	divisor = clk_get_rate(clk->parent) / round;
-	divisor--;
-
-	local_irq_save(flags);
-	tcfg0 = __raw_readl(S3C2410_TCFG0);
-
-	if (clk == &clk_timer_scaler[1]) {
-		tcfg0 &= ~S3C2410_TCFG_PRESCALER1_MASK;
-		tcfg0 |= divisor << S3C2410_TCFG_PRESCALER1_SHIFT;
-	} else {
-		tcfg0 &= ~S3C2410_TCFG_PRESCALER0_MASK;
-		tcfg0 |= divisor;
-	}
-
-	__raw_writel(tcfg0, S3C2410_TCFG0);
-	local_irq_restore(flags);
-
-	return 0;
-}
-
-static struct clk_ops clk_pwm_scaler_ops = {
-	.get_rate	= clk_pwm_scaler_get_rate,
-	.set_rate	= clk_pwm_scaler_set_rate,
-	.round_rate	= clk_pwm_scaler_round_rate,
-};
-
-static struct clk clk_timer_scaler[] = {
-	[0]	= {
-		.name		= "pwm-scaler0",
-		.id		= -1,
-		.ops		= &clk_pwm_scaler_ops,
-	},
-	[1]	= {
-		.name		= "pwm-scaler1",
-		.id		= -1,
-		.ops		= &clk_pwm_scaler_ops,
-	},
-};
-
-static struct clk clk_timer_tclk[] = {
-	[0]	= {
-		.name		= "pwm-tclk0",
-		.id		= -1,
-	},
-	[1]	= {
-		.name		= "pwm-tclk1",
-		.id		= -1,
-	},
-};
-
-struct pwm_tdiv_clk {
-	struct clk	clk;
-	unsigned int	divisor;
-};
-
-static inline struct pwm_tdiv_clk *to_tdiv(struct clk *clk)
-{
-	return container_of(clk, struct pwm_tdiv_clk, clk);
-}
-
-static unsigned long clk_pwm_tdiv_get_rate(struct clk *clk)
-{
-	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
-	unsigned int divisor;
-
-	tcfg1 >>= S3C2410_TCFG1_SHIFT(clk->id);
-	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
-
-	if (pwm_cfg_src_is_tclk(tcfg1))
-		divisor = to_tdiv(clk)->divisor;
-	else
-		divisor = tcfg_to_divisor(tcfg1);
-
-	return clk_get_rate(clk->parent) / divisor;
-}
-
-static unsigned long clk_pwm_tdiv_round_rate(struct clk *clk,
-					     unsigned long rate)
-{
-	unsigned long parent_rate;
-	unsigned long divisor;
-
-	parent_rate = clk_get_rate(clk->parent);
-	divisor = parent_rate / rate;
-
-	if (divisor <= 1 && pwm_tdiv_has_div1())
-		divisor = 1;
-	else if (divisor <= 2)
-		divisor = 2;
-	else if (divisor <= 4)
-		divisor = 4;
-	else if (divisor <= 8)
-		divisor = 8;
-	else
-		divisor = 16;
-
-	return parent_rate / divisor;
-}
-
-static unsigned long clk_pwm_tdiv_bits(struct pwm_tdiv_clk *divclk)
-{
-	return pwm_tdiv_div_bits(divclk->divisor);
-}
-
-static void clk_pwm_tdiv_update(struct pwm_tdiv_clk *divclk)
-{
-	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
-	unsigned long bits = clk_pwm_tdiv_bits(divclk);
-	unsigned long flags;
-	unsigned long shift =  S3C2410_TCFG1_SHIFT(divclk->clk.id);
-
-	local_irq_save(flags);
-
-	tcfg1 = __raw_readl(S3C2410_TCFG1);
-	tcfg1 &= ~(S3C2410_TCFG1_MUX_MASK << shift);
-	tcfg1 |= bits << shift;
-	__raw_writel(tcfg1, S3C2410_TCFG1);
-
-	local_irq_restore(flags);
-}
-
-static int clk_pwm_tdiv_set_rate(struct clk *clk, unsigned long rate)
-{
-	struct pwm_tdiv_clk *divclk = to_tdiv(clk);
-	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
-	unsigned long parent_rate = clk_get_rate(clk->parent);
-	unsigned long divisor;
-
-	tcfg1 >>= S3C2410_TCFG1_SHIFT(clk->id);
-	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
-
-	rate = clk_round_rate(clk, rate);
-	divisor = parent_rate / rate;
-
-	if (divisor > 16)
-		return -EINVAL;
-
-	divclk->divisor = divisor;
-
-	/* Update the current MUX settings if we are currently
-	 * selected as the clock source for this clock. */
-
-	if (!pwm_cfg_src_is_tclk(tcfg1))
-		clk_pwm_tdiv_update(divclk);
-
-	return 0;
-}
-
-static struct clk_ops clk_tdiv_ops = {
-	.get_rate	= clk_pwm_tdiv_get_rate,
-	.set_rate	= clk_pwm_tdiv_set_rate,
-	.round_rate	= clk_pwm_tdiv_round_rate,
-};
-
-static struct pwm_tdiv_clk clk_timer_tdiv[] = {
-	[0]	= {
-		.clk	= {
-			.name	= "pwm-tdiv",
-			.devname	= "s3c24xx-pwm.0",
-			.ops	= &clk_tdiv_ops,
-			.parent	= &clk_timer_scaler[0],
-		},
-	},
-	[1]	= {
-		.clk	= {
-			.name	= "pwm-tdiv",
-			.devname	= "s3c24xx-pwm.1",
-			.ops	= &clk_tdiv_ops,
-			.parent	= &clk_timer_scaler[0],
-		}
-	},
-	[2]	= {
-		.clk	= {
-			.name	= "pwm-tdiv",
-			.devname	= "s3c24xx-pwm.2",
-			.ops	= &clk_tdiv_ops,
-			.parent	= &clk_timer_scaler[1],
-		},
-	},
-	[3]	= {
-		.clk	= {
-			.name	= "pwm-tdiv",
-			.devname	= "s3c24xx-pwm.3",
-			.ops	= &clk_tdiv_ops,
-			.parent	= &clk_timer_scaler[1],
-		},
-	},
-	[4]	= {
-		.clk	= {
-			.name	= "pwm-tdiv",
-			.devname	= "s3c24xx-pwm.4",
-			.ops	= &clk_tdiv_ops,
-			.parent	= &clk_timer_scaler[1],
-		},
-	},
-};
-
-static int __init clk_pwm_tdiv_register(unsigned int id)
-{
-	struct pwm_tdiv_clk *divclk = &clk_timer_tdiv[id];
-	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
-
-	tcfg1 >>= S3C2410_TCFG1_SHIFT(id);
-	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
-
-	divclk->clk.id = id;
-	divclk->divisor = tcfg_to_divisor(tcfg1);
-
-	return s3c24xx_register_clock(&divclk->clk);
-}
-
-static inline struct clk *s3c24xx_pwmclk_tclk(unsigned int id)
-{
-	return (id >= 2) ? &clk_timer_tclk[1] : &clk_timer_tclk[0];
-}
-
-static inline struct clk *s3c24xx_pwmclk_tdiv(unsigned int id)
-{
-	return &clk_timer_tdiv[id].clk;
-}
-
-static int clk_pwm_tin_set_parent(struct clk *clk, struct clk *parent)
-{
-	unsigned int id = clk->id;
-	unsigned long tcfg1;
-	unsigned long flags;
-	unsigned long bits;
-	unsigned long shift = S3C2410_TCFG1_SHIFT(id);
-
-	unsigned long mux_tclk;
-
-	if (soc_is_s3c24xx())
-		mux_tclk = S3C2410_TCFG1_MUX_TCLK;
-	else if (soc_is_s5p6440() || soc_is_s5p6450())
-		mux_tclk = 0;
-	else
-		mux_tclk = S3C64XX_TCFG1_MUX_TCLK;
-
-	if (parent == s3c24xx_pwmclk_tclk(id))
-		bits = mux_tclk << shift;
-	else if (parent == s3c24xx_pwmclk_tdiv(id))
-		bits = clk_pwm_tdiv_bits(to_tdiv(parent)) << shift;
-	else
-		return -EINVAL;
-
-	clk->parent = parent;
-
-	local_irq_save(flags);
-
-	tcfg1 = __raw_readl(S3C2410_TCFG1);
-	tcfg1 &= ~(S3C2410_TCFG1_MUX_MASK << shift);
-	__raw_writel(tcfg1 | bits, S3C2410_TCFG1);
-
-	local_irq_restore(flags);
-
-	return 0;
-}
-
-static struct clk_ops clk_tin_ops = {
-	.set_parent	= clk_pwm_tin_set_parent,
-};
-
-static struct clk clk_tin[] = {
-	[0]	= {
-		.name	= "pwm-tin",
-		.devname	= "s3c24xx-pwm.0",
-		.id	= 0,
-		.ops	= &clk_tin_ops,
-	},
-	[1]	= {
-		.name	= "pwm-tin",
-		.devname	= "s3c24xx-pwm.1",
-		.id	= 1,
-		.ops	= &clk_tin_ops,
-	},
-	[2]	= {
-		.name	= "pwm-tin",
-		.devname	= "s3c24xx-pwm.2",
-		.id	= 2,
-		.ops	= &clk_tin_ops,
-	},
-	[3]	= {
-		.name	= "pwm-tin",
-		.devname	= "s3c24xx-pwm.3",
-		.id	= 3,
-		.ops	= &clk_tin_ops,
-	},
-	[4]	= {
-		.name	= "pwm-tin",
-		.devname	= "s3c24xx-pwm.4",
-		.id	= 4,
-		.ops	= &clk_tin_ops,
-	},
-};
-
-static __init int clk_pwm_tin_register(struct clk *pwm)
-{
-	unsigned long tcfg1 = __raw_readl(S3C2410_TCFG1);
-	unsigned int id = pwm->id;
-
-	struct clk *parent;
-	int ret;
-
-	ret = s3c24xx_register_clock(pwm);
-	if (ret < 0)
-		return ret;
-
-	tcfg1 >>= S3C2410_TCFG1_SHIFT(id);
-	tcfg1 &= S3C2410_TCFG1_MUX_MASK;
-
-	if (pwm_cfg_src_is_tclk(tcfg1))
-		parent = s3c24xx_pwmclk_tclk(id);
-	else
-		parent = s3c24xx_pwmclk_tdiv(id);
-
-	return clk_set_parent(pwm, parent);
-}
-
-/**
- * s3c_pwmclk_init() - initialise pwm clocks
- *
- * Initialise and register the clocks which provide the inputs for the
- * pwm timer blocks.
- *
- * Note, this call is required by the time core, so must be called after
- * the base clocks are added and before any of the initcalls are run.
- */
-__init void s3c_pwmclk_init(void)
-{
-	struct clk *clk_timers;
-	unsigned int clk;
-	int ret;
-
-	clk_timers = clk_get(NULL, "timers");
-	if (IS_ERR(clk_timers)) {
-		printk(KERN_ERR "%s: no parent clock\n", __func__);
-		return;
-	}
-
-	for (clk = 0; clk < ARRAY_SIZE(clk_timer_scaler); clk++)
-		clk_timer_scaler[clk].parent = clk_timers;
-
-	s3c_register_clocks(clk_timer_scaler, ARRAY_SIZE(clk_timer_scaler));
-	s3c_register_clocks(clk_timer_tclk, ARRAY_SIZE(clk_timer_tclk));
-
-	for (clk = 0; clk < ARRAY_SIZE(clk_timer_tdiv); clk++) {
-		ret = clk_pwm_tdiv_register(clk);
-
-		if (ret < 0) {
-			printk(KERN_ERR "error adding pwm%d tdiv clock\n", clk);
-			return;
-		}
-	}
-
-	for (clk = 0; clk < ARRAY_SIZE(clk_tin); clk++) {
-		ret = clk_pwm_tin_register(&clk_tin[clk]);
-		if (ret < 0) {
-			printk(KERN_ERR "error adding pwm%d tin clock\n", clk);
-			return;
-		}
-	}
-}
diff --git a/arch/arm/plat-samsung/s3c-dma-ops.c b/arch/arm/plat-samsung/s3c-dma-ops.c
index 0cc40aea3f5a..98b10ba67dc7 100644
--- a/arch/arm/plat-samsung/s3c-dma-ops.c
+++ b/arch/arm/plat-samsung/s3c-dma-ops.c
@@ -82,7 +82,8 @@ static int s3c_dma_config(unsigned ch, struct samsung_dma_config *param)
 static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep *param)
 {
 	struct cb_data *data;
-	int len = (param->cap == DMA_CYCLIC) ? param->period : param->len;
+	dma_addr_t pos = param->buf;
+	dma_addr_t end = param->buf + param->len;
 
 	list_for_each_entry(data, &dma_list, node)
 		if (data->ch == ch)
@@ -94,7 +95,15 @@ static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep *param)
 		data->fp_param = param->fp_param;
 	}
 
-	s3c2410_dma_enqueue(ch, (void *)data, param->buf, len);
+	if (param->cap != DMA_CYCLIC) {
+		s3c2410_dma_enqueue(ch, (void *)data, param->buf, param->len);
+		return 0;
+	}
+
+	while (pos < end) {
+		s3c2410_dma_enqueue(ch, (void *)data, pos, param->period);
+		pos += param->period;
+	}
 
 	return 0;
 }
diff --git a/arch/arm/plat-samsung/s5p-dev-mfc.c b/arch/arm/plat-samsung/s5p-dev-mfc.c
index a93fb6fb6606..ad51f85fbd01 100644
--- a/arch/arm/plat-samsung/s5p-dev-mfc.c
+++ b/arch/arm/plat-samsung/s5p-dev-mfc.c
@@ -17,10 +17,12 @@
 #include <linux/of_fdt.h>
 #include <linux/of.h>
 
+#include <plat/mfc.h>
+
+#ifdef CONFIG_SAMSUNG_ATAGS
 #include <mach/map.h>
 #include <mach/irqs.h>
 #include <plat/devs.h>
-#include <plat/mfc.h>
 
 static struct resource s5p_mfc_resource[] = {
 	[0] = DEFINE_RES_MEM(S5P_PA_MFC, SZ_64K),
@@ -61,6 +63,10 @@ struct platform_device s5p_device_mfc_r = {
 		.coherent_dma_mask	= DMA_BIT_MASK(32),
 	},
 };
+#else
+static struct platform_device s5p_device_mfc_l;
+static struct platform_device s5p_device_mfc_r;
+#endif
 
 struct s5p_mfc_reserved_mem {
 	phys_addr_t	base;
@@ -70,6 +76,7 @@ struct s5p_mfc_reserved_mem {
 
 static struct s5p_mfc_reserved_mem s5p_mfc_mem[2] __initdata;
 
+
 void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
 				phys_addr_t lbase, unsigned int lsize)
 {
@@ -93,6 +100,7 @@ void __init s5p_mfc_reserve_mem(phys_addr_t rbase, unsigned int rsize,
 	}
 }
 
+#ifdef CONFIG_SAMSUNG_ATAGS
 static int __init s5p_mfc_memory_init(void)
 {
 	int i;
@@ -111,6 +119,7 @@ static int __init s5p_mfc_memory_init(void)
 	return 0;
 }
 device_initcall(s5p_mfc_memory_init);
+#endif
 
 #ifdef CONFIG_OF
 int __init s5p_fdt_find_mfc_mem(unsigned long node, const char *uname,
diff --git a/arch/arm/plat-samsung/s5p-irq.c b/arch/arm/plat-samsung/s5p-irq.c
index ff1a76011b1e..ddfaca9c79d8 100644
--- a/arch/arm/plat-samsung/s5p-irq.c
+++ b/arch/arm/plat-samsung/s5p-irq.c
@@ -17,9 +17,7 @@
 
 #include <mach/irqs.h>
 #include <mach/map.h>
-#include <plat/regs-timer.h>
 #include <plat/cpu.h>
-#include <plat/irq-vic-timer.h>
 
 void __init s5p_init_irq(u32 *vic, u32 num_vic)
 {
@@ -30,6 +28,4 @@ void __init s5p_init_irq(u32 *vic, u32 num_vic)
 	for (irq = 0; irq < num_vic; irq++)
 		vic_init(VA_VIC(irq), VIC_BASE(irq), vic[irq], 0);
 #endif
-
-	s3c_init_vic_timer_irq(5, IRQ_TIMER0);
 }
diff --git a/arch/arm/plat-samsung/samsung-time.c b/arch/arm/plat-samsung/samsung-time.c
deleted file mode 100644
index f899cbc9b288..000000000000
--- a/arch/arm/plat-samsung/samsung-time.c
+++ /dev/null
@@ -1,394 +0,0 @@
-/*
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com/
- *
- * samsung - Common hr-timer support (s3c and s5p)
- *
- * 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/interrupt.h>
-#include <linux/irq.h>
-#include <linux/err.h>
-#include <linux/clk.h>
-#include <linux/clockchips.h>
-#include <linux/platform_device.h>
-
-#include <asm/smp_twd.h>
-#include <asm/mach/time.h>
-#include <asm/mach/arch.h>
-#include <asm/mach/map.h>
-#include <asm/sched_clock.h>
-
-#include <mach/map.h>
-#include <plat/devs.h>
-#include <plat/regs-timer.h>
-#include <plat/samsung-time.h>
-
-static struct clk *tin_event;
-static struct clk *tin_source;
-static struct clk *tdiv_event;
-static struct clk *tdiv_source;
-static struct clk *timerclk;
-static struct samsung_timer_source timer_source;
-static unsigned long clock_count_per_tick;
-static void samsung_timer_resume(void);
-
-static void samsung_time_stop(enum samsung_timer_mode mode)
-{
-	unsigned long tcon;
-
-	tcon = __raw_readl(S3C2410_TCON);
-
-	switch (mode) {
-	case SAMSUNG_PWM0:
-		tcon &= ~S3C2410_TCON_T0START;
-		break;
-
-	case SAMSUNG_PWM1:
-		tcon &= ~S3C2410_TCON_T1START;
-		break;
-
-	case SAMSUNG_PWM2:
-		tcon &= ~S3C2410_TCON_T2START;
-		break;
-
-	case SAMSUNG_PWM3:
-		tcon &= ~S3C2410_TCON_T3START;
-		break;
-
-	case SAMSUNG_PWM4:
-		tcon &= ~S3C2410_TCON_T4START;
-		break;
-
-	default:
-		printk(KERN_ERR "Invalid Timer %d\n", mode);
-		break;
-	}
-	__raw_writel(tcon, S3C2410_TCON);
-}
-
-static void samsung_time_setup(enum samsung_timer_mode mode, unsigned long tcnt)
-{
-	unsigned long tcon;
-
-	tcon = __raw_readl(S3C2410_TCON);
-
-	tcnt--;
-
-	switch (mode) {
-	case SAMSUNG_PWM0:
-		tcon &= ~(0x0f << 0);
-		tcon |= S3C2410_TCON_T0MANUALUPD;
-		break;
-
-	case SAMSUNG_PWM1:
-		tcon &= ~(0x0f << 8);
-		tcon |= S3C2410_TCON_T1MANUALUPD;
-		break;
-
-	case SAMSUNG_PWM2:
-		tcon &= ~(0x0f << 12);
-		tcon |= S3C2410_TCON_T2MANUALUPD;
-		break;
-
-	case SAMSUNG_PWM3:
-		tcon &= ~(0x0f << 16);
-		tcon |= S3C2410_TCON_T3MANUALUPD;
-		break;
-
-	case SAMSUNG_PWM4:
-		tcon &= ~(0x07 << 20);
-		tcon |= S3C2410_TCON_T4MANUALUPD;
-		break;
-
-	default:
-		printk(KERN_ERR "Invalid Timer %d\n", mode);
-		break;
-	}
-
-	__raw_writel(tcnt, S3C2410_TCNTB(mode));
-	__raw_writel(tcnt, S3C2410_TCMPB(mode));
-	__raw_writel(tcon, S3C2410_TCON);
-}
-
-static void samsung_time_start(enum samsung_timer_mode mode, bool periodic)
-{
-	unsigned long tcon;
-
-	tcon  = __raw_readl(S3C2410_TCON);
-
-	switch (mode) {
-	case SAMSUNG_PWM0:
-		tcon |= S3C2410_TCON_T0START;
-		tcon &= ~S3C2410_TCON_T0MANUALUPD;
-
-		if (periodic)
-			tcon |= S3C2410_TCON_T0RELOAD;
-		else
-			tcon &= ~S3C2410_TCON_T0RELOAD;
-		break;
-
-	case SAMSUNG_PWM1:
-		tcon |= S3C2410_TCON_T1START;
-		tcon &= ~S3C2410_TCON_T1MANUALUPD;
-
-		if (periodic)
-			tcon |= S3C2410_TCON_T1RELOAD;
-		else
-			tcon &= ~S3C2410_TCON_T1RELOAD;
-		break;
-
-	case SAMSUNG_PWM2:
-		tcon |= S3C2410_TCON_T2START;
-		tcon &= ~S3C2410_TCON_T2MANUALUPD;
-
-		if (periodic)
-			tcon |= S3C2410_TCON_T2RELOAD;
-		else
-			tcon &= ~S3C2410_TCON_T2RELOAD;
-		break;
-
-	case SAMSUNG_PWM3:
-		tcon |= S3C2410_TCON_T3START;
-		tcon &= ~S3C2410_TCON_T3MANUALUPD;
-
-		if (periodic)
-			tcon |= S3C2410_TCON_T3RELOAD;
-		else
-			tcon &= ~S3C2410_TCON_T3RELOAD;
-		break;
-
-	case SAMSUNG_PWM4:
-		tcon |= S3C2410_TCON_T4START;
-		tcon &= ~S3C2410_TCON_T4MANUALUPD;
-
-		if (periodic)
-			tcon |= S3C2410_TCON_T4RELOAD;
-		else
-			tcon &= ~S3C2410_TCON_T4RELOAD;
-		break;
-
-	default:
-		printk(KERN_ERR "Invalid Timer %d\n", mode);
-		break;
-	}
-	__raw_writel(tcon, S3C2410_TCON);
-}
-
-static int samsung_set_next_event(unsigned long cycles,
-				struct clock_event_device *evt)
-{
-	samsung_time_setup(timer_source.event_id, cycles);
-	samsung_time_start(timer_source.event_id, NON_PERIODIC);
-
-	return 0;
-}
-
-static void samsung_set_mode(enum clock_event_mode mode,
-				struct clock_event_device *evt)
-{
-	samsung_time_stop(timer_source.event_id);
-
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		samsung_time_setup(timer_source.event_id, clock_count_per_tick);
-		samsung_time_start(timer_source.event_id, PERIODIC);
-		break;
-
-	case CLOCK_EVT_MODE_ONESHOT:
-		break;
-
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		break;
-
-	case CLOCK_EVT_MODE_RESUME:
-		samsung_timer_resume();
-		break;
-	}
-}
-
-static void samsung_timer_resume(void)
-{
-	/* event timer restart */
-	samsung_time_setup(timer_source.event_id, clock_count_per_tick);
-	samsung_time_start(timer_source.event_id, PERIODIC);
-
-	/* source timer restart */
-	samsung_time_setup(timer_source.source_id, TCNT_MAX);
-	samsung_time_start(timer_source.source_id, PERIODIC);
-}
-
-void __init samsung_set_timer_source(enum samsung_timer_mode event,
-				 enum samsung_timer_mode source)
-{
-	s3c_device_timer[event].dev.bus = &platform_bus_type;
-	s3c_device_timer[source].dev.bus = &platform_bus_type;
-
-	timer_source.event_id = event;
-	timer_source.source_id = source;
-}
-
-static struct clock_event_device time_event_device = {
-	.name		= "samsung_event_timer",
-	.features	= CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-	.rating		= 200,
-	.set_next_event	= samsung_set_next_event,
-	.set_mode	= samsung_set_mode,
-};
-
-static irqreturn_t samsung_clock_event_isr(int irq, void *dev_id)
-{
-	struct clock_event_device *evt = dev_id;
-
-	evt->event_handler(evt);
-
-	return IRQ_HANDLED;
-}
-
-static struct irqaction samsung_clock_event_irq = {
-	.name		= "samsung_time_irq",
-	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
-	.handler	= samsung_clock_event_isr,
-	.dev_id		= &time_event_device,
-};
-
-static void __init samsung_clockevent_init(void)
-{
-	unsigned long pclk;
-	unsigned long clock_rate;
-	unsigned int irq_number;
-	struct clk *tscaler;
-
-	pclk = clk_get_rate(timerclk);
-
-	tscaler = clk_get_parent(tdiv_event);
-
-	clk_set_rate(tscaler, pclk / TSCALER_DIV);
-	clk_set_rate(tdiv_event, pclk / TDIV);
-	clk_set_parent(tin_event, tdiv_event);
-
-	clock_rate = clk_get_rate(tin_event);
-	clock_count_per_tick = clock_rate / HZ;
-
-	time_event_device.cpumask = cpumask_of(0);
-	clockevents_config_and_register(&time_event_device, clock_rate, 1, -1);
-
-	irq_number = timer_source.event_id + IRQ_TIMER0;
-	setup_irq(irq_number, &samsung_clock_event_irq);
-}
-
-static void __iomem *samsung_timer_reg(void)
-{
-	unsigned long offset = 0;
-
-	switch (timer_source.source_id) {
-	case SAMSUNG_PWM0:
-	case SAMSUNG_PWM1:
-	case SAMSUNG_PWM2:
-	case SAMSUNG_PWM3:
-		offset = (timer_source.source_id * 0x0c) + 0x14;
-		break;
-
-	case SAMSUNG_PWM4:
-		offset = 0x40;
-		break;
-
-	default:
-		printk(KERN_ERR "Invalid Timer %d\n", timer_source.source_id);
-		return NULL;
-	}
-
-	return S3C_TIMERREG(offset);
-}
-
-/*
- * Override the global weak sched_clock symbol with this
- * local implementation which uses the clocksource to get some
- * better resolution when scheduling the kernel. We accept that
- * this wraps around for now, since it is just a relative time
- * stamp. (Inspired by U300 implementation.)
- */
-static u32 notrace samsung_read_sched_clock(void)
-{
-	void __iomem *reg = samsung_timer_reg();
-
-	if (!reg)
-		return 0;
-
-	return ~__raw_readl(reg);
-}
-
-static void __init samsung_clocksource_init(void)
-{
-	unsigned long pclk;
-	unsigned long clock_rate;
-
-	pclk = clk_get_rate(timerclk);
-
-	clk_set_rate(tdiv_source, pclk / TDIV);
-	clk_set_parent(tin_source, tdiv_source);
-
-	clock_rate = clk_get_rate(tin_source);
-
-	samsung_time_setup(timer_source.source_id, TCNT_MAX);
-	samsung_time_start(timer_source.source_id, PERIODIC);
-
-	setup_sched_clock(samsung_read_sched_clock, TSIZE, clock_rate);
-
-	if (clocksource_mmio_init(samsung_timer_reg(), "samsung_clocksource_timer",
-			clock_rate, 250, TSIZE, clocksource_mmio_readl_down))
-		panic("samsung_clocksource_timer: can't register clocksource\n");
-}
-
-static void __init samsung_timer_resources(void)
-{
-
-	unsigned long event_id = timer_source.event_id;
-	unsigned long source_id = timer_source.source_id;
-	char devname[15];
-
-	timerclk = clk_get(NULL, "timers");
-	if (IS_ERR(timerclk))
-		panic("failed to get timers clock for timer");
-
-	clk_enable(timerclk);
-
-	sprintf(devname, "s3c24xx-pwm.%lu", event_id);
-	s3c_device_timer[event_id].id = event_id;
-	s3c_device_timer[event_id].dev.init_name = devname;
-
-	tin_event = clk_get(&s3c_device_timer[event_id].dev, "pwm-tin");
-	if (IS_ERR(tin_event))
-		panic("failed to get pwm-tin clock for event timer");
-
-	tdiv_event = clk_get(&s3c_device_timer[event_id].dev, "pwm-tdiv");
-	if (IS_ERR(tdiv_event))
-		panic("failed to get pwm-tdiv clock for event timer");
-
-	clk_enable(tin_event);
-
-	sprintf(devname, "s3c24xx-pwm.%lu", source_id);
-	s3c_device_timer[source_id].id = source_id;
-	s3c_device_timer[source_id].dev.init_name = devname;
-
-	tin_source = clk_get(&s3c_device_timer[source_id].dev, "pwm-tin");
-	if (IS_ERR(tin_source))
-		panic("failed to get pwm-tin clock for source timer");
-
-	tdiv_source = clk_get(&s3c_device_timer[source_id].dev, "pwm-tdiv");
-	if (IS_ERR(tdiv_source))
-		panic("failed to get pwm-tdiv clock for source timer");
-
-	clk_enable(tin_source);
-}
-
-void __init samsung_timer_init(void)
-{
-	samsung_timer_resources();
-	samsung_clockevent_init();
-	samsung_clocksource_init();
-}
diff --git a/arch/arm/plat-samsung/watchdog-reset.c b/arch/arm/plat-samsung/watchdog-reset.c
new file mode 100644
index 000000000000..2ecb50bea044
--- /dev/null
+++ b/arch/arm/plat-samsung/watchdog-reset.c
@@ -0,0 +1,97 @@
+/* arch/arm/plat-samsung/watchdog-reset.c
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * Coyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
+ *
+ * Watchdog reset support for Samsung SoCs.
+ *
+ * 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/err.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#define S3C2410_WTCON			0x00
+#define S3C2410_WTDAT			0x04
+#define S3C2410_WTCNT			0x08
+
+#define S3C2410_WTCON_ENABLE		(1 << 5)
+#define S3C2410_WTCON_DIV16		(0 << 3)
+#define S3C2410_WTCON_RSTEN		(1 << 0)
+#define S3C2410_WTCON_PRESCALE(x)	((x) << 8)
+
+static void __iomem *wdt_base;
+static struct clk *wdt_clock;
+
+void samsung_wdt_reset(void)
+{
+	if (!wdt_base) {
+		pr_err("%s: wdt reset not initialized\n", __func__);
+		/* delay to allow the serial port to show the message */
+		mdelay(50);
+		return;
+	}
+
+	if (!IS_ERR(wdt_clock))
+		clk_prepare_enable(wdt_clock);
+
+	/* disable watchdog, to be safe  */
+	__raw_writel(0, wdt_base + S3C2410_WTCON);
+
+	/* put initial values into count and data */
+	__raw_writel(0x80, wdt_base + S3C2410_WTCNT);
+	__raw_writel(0x80, wdt_base + S3C2410_WTDAT);
+
+	/* set the watchdog to go and reset... */
+	__raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV16 |
+			S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x20),
+			wdt_base + S3C2410_WTCON);
+
+	/* wait for reset to assert... */
+	mdelay(500);
+
+	pr_err("Watchdog reset failed to assert reset\n");
+
+	/* delay to allow the serial port to show the message */
+	mdelay(50);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id s3c2410_wdt_match[] = {
+	{ .compatible = "samsung,s3c2410-wdt" },
+	{},
+};
+
+void __init samsung_wdt_reset_of_init(void)
+{
+	struct device_node *np;
+
+	np = of_find_matching_node(NULL, s3c2410_wdt_match);
+	if (!np) {
+		pr_err("%s: failed to find watchdog node\n", __func__);
+		return;
+	}
+
+	wdt_base = of_iomap(np, 0);
+	if (!wdt_base) {
+		pr_err("%s: failed to map watchdog registers\n", __func__);
+		return;
+	}
+
+	wdt_clock = of_clk_get(np, 0);
+}
+#endif
+
+void __init samsung_wdt_reset_init(void __iomem *base)
+{
+	wdt_base = base;
+	wdt_clock = clk_get(NULL, "watchdog");
+}