Merge tag 'tags/cleanup2-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC late cleanups from Arnd Bergmann:
 "These could not be part of the first cleanup branch, because they
  either came too late in the cycle, or they have dependencies on other
  branches.  Important changes are:

   - The integrator platform is almost multiplatform capable after some
     reorganization (Linus Walleij)
   - Minor cleanups on Zynq (Michal Simek)
   - Lots of changes for Exynos and other Samsung platforms, including
     further preparations for multiplatform support and the clocks
     bindings are rearranged"

* tag 'tags/cleanup2-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (54 commits)
  devicetree: fix newly added exynos sata bindings
  ARM: EXYNOS: Fix compilation error in cpuidle.c
  ARM: S5P64X0: Explicitly include linux/serial_s3c.h in mach/pm-core.h
  ARM: EXYNOS: Remove hardware.h file
  ARM: SAMSUNG: Remove hardware.h inclusion
  ARM: S3C24XX: Remove invalid code from hardware.h
  dt-bindings: clock: Move exynos-audss-clk.h to dt-bindings/clock
  ARM: dts: Keep some essential LDOs enabled for arndale-octa board
  ARM: dts: Disable MDMA1 node for arndale-octa board
  ARM: S3C64XX: Fix build for implicit serial_s3c.h inclusion
  serial: s3c: Fix build of header without serial_core.h preinclusion
  ARM: EXYNOS: Allow wake-up using GIC interrupts
  ARM: EXYNOS: Stop using legacy Samsung PM code
  ARM: EXYNOS: Remove PM initcalls and useless indirection
  ARM: EXYNOS: Fix abuse of CONFIG_PM
  ARM: SAMSUNG: Move s3c_pm_check_* prototypes to plat/pm-common.h
  ARM: SAMSUNG: Move common save/restore helpers to separate file
  ARM: SAMSUNG: Move Samsung PM debug code into separate file
  ARM: SAMSUNG: Consolidate PM debug functions
  ARM: SAMSUNG: Use debug_ll_addr() to get UART base address
  ...

14 files changed, 366 insertions, 419 deletions

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 8d197dc..fc8bf18 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -24,7 +24,7 @@ config ARCH_EXYNOS4
 	select HAVE_SMP
 	select MIGHT_HAVE_CACHE_L2X0
 	select PINCTRL
-	select PM_GENERIC_DOMAINS if PM
+	select PM_GENERIC_DOMAINS if PM_RUNTIME
 	select S5P_DEV_MFC
 	help
 	  Samsung EXYNOS4 SoCs based systems
@@ -46,10 +46,8 @@ config CPU_EXYNOS4210
 	default y
 	depends on ARCH_EXYNOS4
 	select ARCH_HAS_BANDGAP
-	select ARM_CPU_SUSPEND if PM
+	select ARM_CPU_SUSPEND if PM_SLEEP
 	select PINCTRL_EXYNOS
-	select S5P_PM if PM
-	select S5P_SLEEP if PM
 	select SAMSUNG_DMADEV
 	help
 	  Enable EXYNOS4210 CPU support
@@ -60,8 +58,6 @@ config SOC_EXYNOS4212
 	depends on ARCH_EXYNOS4
 	select ARCH_HAS_BANDGAP
 	select PINCTRL_EXYNOS
-	select S5P_PM if PM
-	select S5P_SLEEP if PM
 	select SAMSUNG_DMADEV
 	help
 	  Enable EXYNOS4212 SoC support
@@ -82,9 +78,7 @@ config SOC_EXYNOS5250
 	depends on ARCH_EXYNOS5
 	select ARCH_HAS_BANDGAP
 	select PINCTRL_EXYNOS
-	select PM_GENERIC_DOMAINS if PM
-	select S5P_PM if PM
-	select S5P_SLEEP if PM
+	select PM_GENERIC_DOMAINS if PM_RUNTIME
 	select S5P_DEV_MFC
 	select SAMSUNG_DMADEV
 	help
@@ -94,9 +88,7 @@ config SOC_EXYNOS5420
 	bool "SAMSUNG EXYNOS5420"
 	default y
 	depends on ARCH_EXYNOS5
-	select PM_GENERIC_DOMAINS if PM
-	select S5P_PM if PM
-	select S5P_SLEEP if PM
+	select PM_GENERIC_DOMAINS if PM_RUNTIME
 	help
 	  Enable EXYNOS5420 SoC support
 
diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
index 8930b66..a656dbe 100644
--- a/arch/arm/mach-exynos/Makefile
+++ b/arch/arm/mach-exynos/Makefile
@@ -12,9 +12,9 @@ obj-				:=
 
 # Core
 
-obj-$(CONFIG_ARCH_EXYNOS)	+= common.o
+obj-$(CONFIG_ARCH_EXYNOS)	+= exynos.o
 
-obj-$(CONFIG_S5P_PM)		+= pm.o
+obj-$(CONFIG_PM_SLEEP)		+= pm.o sleep.o
 obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o
 obj-$(CONFIG_CPU_IDLE)		+= cpuidle.o
 
@@ -29,8 +29,3 @@ obj-$(CONFIG_ARCH_EXYNOS)	+= firmware.o
 
 plus_sec := $(call as-instr,.arch_extension sec,+sec)
 AFLAGS_exynos-smc.o		:=-Wa,-march=armv7-a$(plus_sec)
-
-# machine support
-
-obj-$(CONFIG_ARCH_EXYNOS4)	+= mach-exynos4-dt.o
-obj-$(CONFIG_ARCH_EXYNOS5)	+= mach-exynos5-dt.o
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index f76967b..9ef3f83 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -19,14 +19,27 @@ void mct_init(void __iomem *base, int irq_g0, int irq_l0, int irq_l1);
 
 struct map_desc;
 void exynos_init_io(void);
-void exynos4_restart(enum reboot_mode mode, const char *cmd);
-void exynos5_restart(enum reboot_mode mode, const char *cmd);
+void exynos_restart(enum reboot_mode mode, const char *cmd);
 void exynos_cpuidle_init(void);
 void exynos_cpufreq_init(void);
 void exynos_init_late(void);
 
 void exynos_firmware_init(void);
 
+#ifdef CONFIG_PINCTRL_EXYNOS
+extern u32 exynos_get_eint_wake_mask(void);
+#else
+static inline u32 exynos_get_eint_wake_mask(void) { return 0xffffffff; }
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+extern void __init exynos_pm_init(void);
+#else
+static inline void exynos_pm_init(void) {}
+#endif
+
+extern void exynos_cpu_resume(void);
+
 extern struct smp_operations exynos_smp_ops;
 
 extern void exynos_cpu_die(unsigned int cpu);
diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
index 93d2dec..c57cae0 100644
--- a/arch/arm/mach-exynos/cpuidle.c
+++ b/arch/arm/mach-exynos/cpuidle.c
@@ -27,7 +27,6 @@
 #include <plat/cpu.h>
 #include <plat/pm.h>
 
-#include <mach/pm-core.h>
 #include <mach/map.h>
 
 #include "common.h"
@@ -128,7 +127,7 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev,
 	/* Set value of power down register for aftr mode */
 	exynos_sys_powerdown_conf(SYS_AFTR);
 
-	__raw_writel(virt_to_phys(s3c_cpu_resume), REG_DIRECTGO_ADDR);
+	__raw_writel(virt_to_phys(exynos_cpu_resume), REG_DIRECTGO_ADDR);
 	__raw_writel(S5P_CHECK_AFTR, REG_DIRECTGO_FLAG);
 
 	save_cpu_arch_register();
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/exynos.c
index b2f9bb0..b32a907 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -1,105 +1,40 @@
 /*
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
+ * SAMSUNG EXYNOS Flattened Device Tree enabled machine
  *
- * Common Codes for EXYNOS
+ * Copyright (c) 2010-2014 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.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/kernel.h>
-#include <linux/bitops.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/irqchip.h>
+#include <linux/init.h>
 #include <linux/io.h>
-#include <linux/device.h>
-#include <linux/gpio.h>
-#include <clocksource/samsung_pwm.h>
-#include <linux/sched.h>
-#include <linux/serial_core.h>
+#include <linux/kernel.h>
 #include <linux/serial_s3c.h>
 #include <linux/of.h>
-#include <linux/of_fdt.h>
-#include <linux/of_irq.h>
-#include <linux/pm_domain.h>
-#include <linux/export.h>
-#include <linux/irqdomain.h>
 #include <linux/of_address.h>
-#include <linux/irqchip/arm-gic.h>
-#include <linux/irqchip/chained_irq.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/pm_domain.h>
 
-#include <asm/proc-fns.h>
-#include <asm/exception.h>
+#include <asm/cacheflush.h>
 #include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
 #include <asm/mach/map.h>
-#include <asm/mach/irq.h>
-#include <asm/cacheflush.h>
+#include <asm/memory.h>
 
 #include <plat/cpu.h>
-#include <plat/pm.h>
 
 #include "common.h"
+#include "mfc.h"
 #include "regs-pmu.h"
 
 #define L2_AUX_VAL 0x7C470001
 #define L2_AUX_MASK 0xC200ffff
 
-static const char name_exynos4210[] = "EXYNOS4210";
-static const char name_exynos4212[] = "EXYNOS4212";
-static const char name_exynos4412[] = "EXYNOS4412";
-static const char name_exynos5250[] = "EXYNOS5250";
-static const char name_exynos5420[] = "EXYNOS5420";
-static const char name_exynos5440[] = "EXYNOS5440";
-
-static void exynos4_map_io(void);
-static void exynos5_map_io(void);
-static int exynos_init(void);
-
-static struct cpu_table cpu_ids[] __initdata = {
-	{
-		.idcode		= EXYNOS4210_CPU_ID,
-		.idmask		= EXYNOS4_CPU_MASK,
-		.map_io		= exynos4_map_io,
-		.init		= exynos_init,
-		.name		= name_exynos4210,
-	}, {
-		.idcode		= EXYNOS4212_CPU_ID,
-		.idmask		= EXYNOS4_CPU_MASK,
-		.map_io		= exynos4_map_io,
-		.init		= exynos_init,
-		.name		= name_exynos4212,
-	}, {
-		.idcode		= EXYNOS4412_CPU_ID,
-		.idmask		= EXYNOS4_CPU_MASK,
-		.map_io		= exynos4_map_io,
-		.init		= exynos_init,
-		.name		= name_exynos4412,
-	}, {
-		.idcode		= EXYNOS5250_SOC_ID,
-		.idmask		= EXYNOS5_SOC_MASK,
-		.map_io		= exynos5_map_io,
-		.init		= exynos_init,
-		.name		= name_exynos5250,
-	}, {
-		.idcode		= EXYNOS5420_SOC_ID,
-		.idmask		= EXYNOS5_SOC_MASK,
-		.map_io		= exynos5_map_io,
-		.init		= exynos_init,
-		.name		= name_exynos5420,
-	}, {
-		.idcode		= EXYNOS5440_SOC_ID,
-		.idmask		= EXYNOS5_SOC_MASK,
-		.init		= exynos_init,
-		.name		= name_exynos5440,
-	},
-};
-
-/* Initial IO mappings */
-
 static struct map_desc exynos4_iodesc[] __initdata = {
 	{
 		.virtual	= (unsigned long)S3C_VA_SYS,
@@ -263,19 +198,11 @@ static struct map_desc exynos5_iodesc[] __initdata = {
 	},
 };
 
-void exynos4_restart(enum reboot_mode mode, const char *cmd)
-{
-	__raw_writel(0x1, S5P_SWRESET);
-}
-
-void exynos5_restart(enum reboot_mode mode, const char *cmd)
+void exynos_restart(enum reboot_mode mode, const char *cmd)
 {
 	struct device_node *np;
-	u32 val;
-	void __iomem *addr;
-
-	val = 0x1;
-	addr = EXYNOS_SWRESET;
+	u32 val = 0x1;
+	void __iomem *addr = EXYNOS_SWRESET;
 
 	if (of_machine_is_compatible("samsung,exynos5440")) {
 		u32 status;
@@ -315,6 +242,7 @@ void __init exynos_init_late(void)
 		return;
 
 	pm_genpd_poweroff_unused();
+	exynos_pm_init();
 }
 
 static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
@@ -345,6 +273,28 @@ static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,
  *
  * register the standard cpu IO areas
  */
+static void __init exynos_map_io(void)
+{
+	if (soc_is_exynos4())
+		iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
+
+	if (soc_is_exynos5())
+		iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
+
+	if (soc_is_exynos4210()) {
+		if (samsung_rev() == EXYNOS4210_REV_0)
+			iotable_init(exynos4_iodesc0,
+						ARRAY_SIZE(exynos4_iodesc0));
+		else
+			iotable_init(exynos4_iodesc1,
+						ARRAY_SIZE(exynos4_iodesc1));
+		iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
+	}
+	if (soc_is_exynos4212() || soc_is_exynos4412())
+		iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
+	if (soc_is_exynos5250())
+		iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
+}
 
 void __init exynos_init_io(void)
 {
@@ -355,30 +305,7 @@ void __init exynos_init_io(void)
 	/* detect cpu id and rev. */
 	s5p_init_cpu(S5P_VA_CHIPID);
 
-	s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
-}
-
-static void __init exynos4_map_io(void)
-{
-	iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
-
-	if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
-		iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
-	else
-		iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
-
-	if (soc_is_exynos4210())
-		iotable_init(exynos4210_iodesc, ARRAY_SIZE(exynos4210_iodesc));
-	if (soc_is_exynos4212() || soc_is_exynos4412())
-		iotable_init(exynos4x12_iodesc, ARRAY_SIZE(exynos4x12_iodesc));
-}
-
-static void __init exynos5_map_io(void)
-{
-	iotable_init(exynos5_iodesc, ARRAY_SIZE(exynos5_iodesc));
-
-	if (soc_is_exynos5250())
-		iotable_init(exynos5250_iodesc, ARRAY_SIZE(exynos5250_iodesc));
+	exynos_map_io();
 }
 
 struct bus_type exynos_subsys = {
@@ -386,10 +313,6 @@ struct bus_type exynos_subsys = {
 	.dev_name	= "exynos-core",
 };
 
-static struct device exynos4_dev = {
-	.bus	= &exynos_subsys,
-};
-
 static int __init exynos_core_init(void)
 {
 	return subsys_system_register(&exynos_subsys, NULL);
@@ -412,9 +335,77 @@ static int __init exynos4_l2x0_cache_init(void)
 }
 early_initcall(exynos4_l2x0_cache_init);
 
-static int __init exynos_init(void)
+static void __init exynos_dt_machine_init(void)
 {
-	printk(KERN_INFO "EXYNOS: Initializing architecture\n");
+	struct device_node *i2c_np;
+	const char *i2c_compat = "samsung,s3c2440-i2c";
+	unsigned int tmp;
+	int id;
+
+	/*
+	 * Exynos5's legacy i2c controller and new high speed i2c
+	 * controller have muxed interrupt sources. By default the
+	 * interrupts for 4-channel HS-I2C controller are enabled.
+	 * If node for first four channels of legacy i2c controller
+	 * are available then re-configure the interrupts via the
+	 * system register.
+	 */
+	if (soc_is_exynos5()) {
+		for_each_compatible_node(i2c_np, NULL, i2c_compat) {
+			if (of_device_is_available(i2c_np)) {
+				id = of_alias_get_id(i2c_np, "i2c");
+				if (id < 4) {
+					tmp = readl(EXYNOS5_SYS_I2C_CFG);
+					writel(tmp & ~(0x1 << id),
+							EXYNOS5_SYS_I2C_CFG);
+				}
+			}
+		}
+	}
 
-	return device_register(&exynos4_dev);
+	exynos_cpuidle_init();
+	exynos_cpufreq_init();
+
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
+
+static char const *exynos_dt_compat[] __initconst = {
+	"samsung,exynos4",
+	"samsung,exynos4210",
+	"samsung,exynos4212",
+	"samsung,exynos4412",
+	"samsung,exynos5",
+	"samsung,exynos5250",
+	"samsung,exynos5420",
+	"samsung,exynos5440",
+	NULL
+};
+
+static void __init exynos_reserve(void)
+{
+#ifdef CONFIG_S5P_DEV_MFC
+	int i;
+	char *mfc_mem[] = {
+		"samsung,mfc-v5",
+		"samsung,mfc-v6",
+		"samsung,mfc-v7",
+	};
+
+	for (i = 0; i < ARRAY_SIZE(mfc_mem); i++)
+		if (of_scan_flat_dt(s5p_fdt_alloc_mfc_mem, mfc_mem[i]))
+			break;
+#endif
+}
+
+DT_MACHINE_START(EXYNOS_DT, "SAMSUNG EXYNOS (Flattened Device Tree)")
+	/* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
+	/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
+	.smp		= smp_ops(exynos_smp_ops),
+	.map_io		= exynos_init_io,
+	.init_early	= exynos_firmware_init,
+	.init_machine	= exynos_dt_machine_init,
+	.init_late	= exynos_init_late,
+	.dt_compat	= exynos_dt_compat,
+	.restart	= exynos_restart,
+	.reserve	= exynos_reserve,
+MACHINE_END
diff --git a/arch/arm/mach-exynos/include/mach/hardware.h b/arch/arm/mach-exynos/include/mach/hardware.h
deleted file mode 100644
index 5109eb2..0000000
--- a/arch/arm/mach-exynos/include/mach/hardware.h
+++ /dev/null
@@ -1,18 +0,0 @@
-/* linux/arch/arm/mach-exynos4/include/mach/hardware.h
- *
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- *
- * EXYNOS4 - Hardware 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_ARCH_HARDWARE_H
-#define __ASM_ARCH_HARDWARE_H __FILE__
-
-/* currently nothing here, placeholder */
-
-#endif /* __ASM_ARCH_HARDWARE_H */
diff --git a/arch/arm/mach-exynos/include/mach/pm-core.h b/arch/arm/mach-exynos/include/mach/pm-core.h
deleted file mode 100644
index dc0697c..0000000
--- a/arch/arm/mach-exynos/include/mach/pm-core.h
+++ /dev/null
@@ -1,75 +0,0 @@
-/* linux/arch/arm/mach-exynos4/include/mach/pm-core.h
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- *
- * Based on arch/arm/mach-s3c2410/include/mach/pm-core.h,
- * Copyright 2008 Simtec Electronics
- *      Ben Dooks <ben@simtec.co.uk>
- *      http://armlinux.simtec.co.uk/
- *
- * EXYNOS4210 - PM core support for arch/arm/plat-s5p/pm.c
- *
- * 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_PM_CORE_H
-#define __ASM_ARCH_PM_CORE_H __FILE__
-
-#include <linux/of.h>
-#include <mach/map.h>
-
-#define S5P_EINT_WAKEUP_MASK			(S5P_VA_PMU + 0x0604)
-#define S5P_WAKEUP_MASK				(S5P_VA_PMU + 0x0608)
-
-#ifdef CONFIG_PINCTRL_EXYNOS
-extern u32 exynos_get_eint_wake_mask(void);
-#else
-static inline u32 exynos_get_eint_wake_mask(void) { return 0xffffffff; }
-#endif
-
-static inline void s3c_pm_debug_init_uart(void)
-{
-	/* nothing here yet */
-}
-
-static inline void s3c_pm_arch_prepare_irqs(void)
-{
-	__raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK);
-	__raw_writel(s3c_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK);
-}
-
-static inline void s3c_pm_arch_stop_clocks(void)
-{
-	/* nothing here yet */
-}
-
-static inline void s3c_pm_arch_show_resume_irqs(void)
-{
-	/* nothing here yet */
-}
-
-static inline void s3c_pm_arch_update_uart(void __iomem *regs,
-					   struct pm_uart_save *save)
-{
-	/* nothing here yet */
-}
-
-static inline void s3c_pm_restored_gpios(void)
-{
-	/* nothing here yet */
-}
-
-static inline void samsung_pm_saved_gpios(void)
-{
-	/* nothing here yet */
-}
-
-/* Compatibility definitions to make plat-samsung/pm.c compile */
-#define IRQ_EINT_BIT(x)		1
-#define s3c_irqwake_intallow	0
-#define s3c_irqwake_eintallow	0
-
-#endif /* __ASM_ARCH_PM_CORE_H */
diff --git a/arch/arm/mach-exynos/mach-exynos4-dt.c b/arch/arm/mach-exynos/mach-exynos4-dt.c
deleted file mode 100644
index d3e54b7..0000000
--- a/arch/arm/mach-exynos/mach-exynos4-dt.c
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Samsung's EXYNOS4 flattened device tree enabled machine
- *
- * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- * Copyright (c) 2010-2011 Linaro Ltd.
- *		www.linaro.org
- *
- * 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/of_platform.h>
-#include <linux/of_fdt.h>
-
-#include <asm/mach/arch.h>
-#include <plat/mfc.h>
-
-#include "common.h"
-
-static void __init exynos4_dt_machine_init(void)
-{
-	exynos_cpuidle_init();
-	exynos_cpufreq_init();
-
-	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
-}
-
-static char const *exynos4_dt_compat[] __initdata = {
-	"samsung,exynos4210",
-	"samsung,exynos4212",
-	"samsung,exynos4412",
-	NULL
-};
-
-static void __init exynos4_reserve(void)
-{
-#ifdef CONFIG_S5P_DEV_MFC
-	struct s5p_mfc_dt_meminfo mfc_mem;
-
-	/* Reserve memory for MFC only if it's available */
-	mfc_mem.compatible = "samsung,mfc-v5";
-	if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
-		s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
-				mfc_mem.lsize);
-#endif
-}
-DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
-	/* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
-	.smp		= smp_ops(exynos_smp_ops),
-	.map_io		= exynos_init_io,
-	.init_early	= exynos_firmware_init,
-	.init_machine	= exynos4_dt_machine_init,
-	.init_late	= exynos_init_late,
-	.dt_compat	= exynos4_dt_compat,
-	.restart        = exynos4_restart,
-	.reserve	= exynos4_reserve,
-MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
deleted file mode 100644
index 37ea261..0000000
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine
- *
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- *		http://www.samsung.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/of_platform.h>
-#include <linux/of_fdt.h>
-#include <linux/io.h>
-
-#include <asm/mach/arch.h>
-#include <plat/mfc.h>
-
-#include "common.h"
-#include "regs-pmu.h"
-
-static void __init exynos5_dt_machine_init(void)
-{
-	struct device_node *i2c_np;
-	const char *i2c_compat = "samsung,s3c2440-i2c";
-	unsigned int tmp;
-
-	/*
-	 * Exynos5's legacy i2c controller and new high speed i2c
-	 * controller have muxed interrupt sources. By default the
-	 * interrupts for 4-channel HS-I2C controller are enabled.
-	 * If node for first four channels of legacy i2c controller
-	 * are available then re-configure the interrupts via the
-	 * system register.
-	 */
-	for_each_compatible_node(i2c_np, NULL, i2c_compat) {
-		if (of_device_is_available(i2c_np)) {
-			if (of_alias_get_id(i2c_np, "i2c") < 4) {
-				tmp = readl(EXYNOS5_SYS_I2C_CFG);
-				writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")),
-						EXYNOS5_SYS_I2C_CFG);
-			}
-		}
-	}
-
-	exynos_cpuidle_init();
-	exynos_cpufreq_init();
-
-	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
-}
-
-static char const *exynos5_dt_compat[] __initdata = {
-	"samsung,exynos5250",
-	"samsung,exynos5420",
-	"samsung,exynos5440",
-	NULL
-};
-
-static void __init exynos5_reserve(void)
-{
-#ifdef CONFIG_S5P_DEV_MFC
-	struct s5p_mfc_dt_meminfo mfc_mem;
-
-	/* Reserve memory for MFC only if it's available */
-	mfc_mem.compatible = "samsung,mfc-v6";
-	if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem))
-		s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff,
-				mfc_mem.lsize);
-#endif
-}
-
-DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
-	/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
-	.smp		= smp_ops(exynos_smp_ops),
-	.map_io		= exynos_init_io,
-	.init_machine	= exynos5_dt_machine_init,
-	.init_late	= exynos_init_late,
-	.dt_compat	= exynos5_dt_compat,
-	.restart        = exynos5_restart,
-	.reserve	= exynos5_reserve,
-MACHINE_END
diff --git a/arch/arm/mach-exynos/mfc.h b/arch/arm/mach-exynos/mfc.h
new file mode 100644
index 0000000..dec93cd
--- /dev/null
+++ b/arch/arm/mach-exynos/mfc.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co.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.
+ */
+
+#ifndef __MACH_EXYNOS_MFC_H
+#define __MACH_EXYNOS_MFC_H __FILE__
+
+int __init s5p_fdt_alloc_mfc_mem(unsigned long node, const char *uname,
+				int depth, void *data);
+
+#endif /* __MACH_EXYNOS_MFC_H */
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 8ea02f6..03e5e9f 100644
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -26,8 +26,6 @@
 #include <asm/smp_scu.h>
 #include <asm/firmware.h>
 
-#include <mach/hardware.h>
-
 #include <plat/cpu.h>
 
 #include "common.h"
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index ba18214..15af0ce 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -17,24 +17,35 @@
 #include <linux/suspend.h>
 #include <linux/syscore_ops.h>
 #include <linux/io.h>
+#include <linux/irqchip/arm-gic.h>
 #include <linux/err.h>
 #include <linux/clk.h>
 
 #include <asm/cacheflush.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/smp_scu.h>
+#include <asm/suspend.h>
 
 #include <plat/cpu.h>
-#include <plat/pm.h>
+#include <plat/pm-common.h>
 #include <plat/pll.h>
 #include <plat/regs-srom.h>
 
 #include <mach/map.h>
-#include <mach/pm-core.h>
 
 #include "common.h"
 #include "regs-pmu.h"
 
+/**
+ * struct exynos_wkup_irq - Exynos GIC to PMU IRQ mapping
+ * @hwirq: Hardware IRQ signal of the GIC
+ * @mask: Mask in PMU wake-up mask register
+ */
+struct exynos_wkup_irq {
+	unsigned int hwirq;
+	u32 mask;
+};
+
 static struct sleep_save exynos5_sys_save[] = {
 	SAVE_ITEM(EXYNOS5_SYS_I2C_CFG),
 };
@@ -48,6 +59,46 @@ static struct sleep_save exynos_core_save[] = {
 	SAVE_ITEM(S5P_SROM_BC3),
 };
 
+/*
+ * GIC wake-up support
+ */
+
+static u32 exynos_irqwake_intmask = 0xffffffff;
+
+static const struct exynos_wkup_irq exynos4_wkup_irq[] = {
+	{ 76, BIT(1) }, /* RTC alarm */
+	{ 77, BIT(2) }, /* RTC tick */
+	{ /* sentinel */ },
+};
+
+static const struct exynos_wkup_irq exynos5250_wkup_irq[] = {
+	{ 75, BIT(1) }, /* RTC alarm */
+	{ 76, BIT(2) }, /* RTC tick */
+	{ /* sentinel */ },
+};
+
+static int exynos_irq_set_wake(struct irq_data *data, unsigned int state)
+{
+	const struct exynos_wkup_irq *wkup_irq;
+
+	if (soc_is_exynos5250())
+		wkup_irq = exynos5250_wkup_irq;
+	else
+		wkup_irq = exynos4_wkup_irq;
+
+	while (wkup_irq->mask) {
+		if (wkup_irq->hwirq == data->hwirq) {
+			if (!state)
+				exynos_irqwake_intmask |= wkup_irq->mask;
+			else
+				exynos_irqwake_intmask &= ~wkup_irq->mask;
+			return 0;
+		}
+		++wkup_irq;
+	}
+
+	return -ENOENT;
+}
 
 /* For Cortex-A9 Diagnostic and Power control register */
 static unsigned int save_arm_register[2];
@@ -72,6 +123,10 @@ static void exynos_pm_prepare(void)
 {
 	unsigned int tmp;
 
+	/* Set wake-up mask registers */
+	__raw_writel(exynos_get_eint_wake_mask(), S5P_EINT_WAKEUP_MASK);
+	__raw_writel(exynos_irqwake_intmask & ~(1 << 31), S5P_WAKEUP_MASK);
+
 	s3c_pm_do_save(exynos_core_save, ARRAY_SIZE(exynos_core_save));
 
 	if (soc_is_exynos5250()) {
@@ -89,41 +144,8 @@ static void exynos_pm_prepare(void)
 
 	/* ensure at least INFORM0 has the resume address */
 
-	__raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
-}
-
-static int exynos_pm_add(struct device *dev, struct subsys_interface *sif)
-{
-	pm_cpu_prep = exynos_pm_prepare;
-	pm_cpu_sleep = exynos_cpu_suspend;
-
-	return 0;
-}
-
-static struct subsys_interface exynos_pm_interface = {
-	.name		= "exynos_pm",
-	.subsys		= &exynos_subsys,
-	.add_dev	= exynos_pm_add,
-};
-
-static __init int exynos_pm_drvinit(void)
-{
-	unsigned int tmp;
-
-	if (soc_is_exynos5440())
-		return 0;
-
-	s3c_pm_init();
-
-	/* All wakeup disable */
-
-	tmp = __raw_readl(S5P_WAKEUP_MASK);
-	tmp |= ((0xFF << 8) | (0x1F << 1));
-	__raw_writel(tmp, S5P_WAKEUP_MASK);
-
-	return subsys_interface_register(&exynos_pm_interface);
+	__raw_writel(virt_to_phys(exynos_cpu_resume), S5P_INFORM0);
 }
-arch_initcall(exynos_pm_drvinit);
 
 static int exynos_pm_suspend(void)
 {
@@ -220,12 +242,80 @@ static struct syscore_ops exynos_pm_syscore_ops = {
 	.resume		= exynos_pm_resume,
 };
 
-static __init int exynos_pm_syscore_init(void)
+/*
+ * Suspend Ops
+ */
+
+static int exynos_suspend_enter(suspend_state_t state)
 {
-	if (soc_is_exynos5440())
-		return 0;
+	int ret;
+
+	s3c_pm_debug_init();
+
+	S3C_PMDBG("%s: suspending the system...\n", __func__);
+
+	S3C_PMDBG("%s: wakeup masks: %08x,%08x\n", __func__,
+			exynos_irqwake_intmask, exynos_get_eint_wake_mask());
+
+	if (exynos_irqwake_intmask == -1U
+	    && exynos_get_eint_wake_mask() == -1U) {
+		pr_err("%s: No wake-up sources!\n", __func__);
+		pr_err("%s: Aborting sleep\n", __func__);
+		return -EINVAL;
+	}
+
+	s3c_pm_save_uarts();
+	exynos_pm_prepare();
+	flush_cache_all();
+	s3c_pm_check_store();
+
+	ret = cpu_suspend(0, exynos_cpu_suspend);
+	if (ret)
+		return ret;
+
+	s3c_pm_restore_uarts();
+
+	S3C_PMDBG("%s: wakeup stat: %08x\n", __func__,
+			__raw_readl(S5P_WAKEUP_STAT));
+
+	s3c_pm_check_restore();
+
+	S3C_PMDBG("%s: resuming the system...\n", __func__);
 
-	register_syscore_ops(&exynos_pm_syscore_ops);
 	return 0;
 }
-arch_initcall(exynos_pm_syscore_init);
+
+static int exynos_suspend_prepare(void)
+{
+	s3c_pm_check_prepare();
+
+	return 0;
+}
+
+static void exynos_suspend_finish(void)
+{
+	s3c_pm_check_cleanup();
+}
+
+static const struct platform_suspend_ops exynos_suspend_ops = {
+	.enter		= exynos_suspend_enter,
+	.prepare	= exynos_suspend_prepare,
+	.finish		= exynos_suspend_finish,
+	.valid		= suspend_valid_only_mem,
+};
+
+void __init exynos_pm_init(void)
+{
+	u32 tmp;
+
+	/* Platform-specific GIC callback */
+	gic_arch_extn.irq_set_wake = exynos_irq_set_wake;
+
+	/* All wakeup disable */
+	tmp = __raw_readl(S5P_WAKEUP_MASK);
+	tmp |= ((0xFF << 8) | (0x1F << 1));
+	__raw_writel(tmp, S5P_WAKEUP_MASK);
+
+	register_syscore_ops(&exynos_pm_syscore_ops);
+	suspend_set_ops(&exynos_suspend_ops);
+}
diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h
index 7c029ce..4f6a256 100644
--- a/arch/arm/mach-exynos/regs-pmu.h
+++ b/arch/arm/mach-exynos/regs-pmu.h
@@ -26,11 +26,12 @@
 #define S5P_USE_STANDBY_WFI0			(1 << 16)
 #define S5P_USE_STANDBY_WFE0			(1 << 24)
 
-#define S5P_SWRESET				S5P_PMUREG(0x0400)
 #define EXYNOS_SWRESET				S5P_PMUREG(0x0400)
 #define EXYNOS5440_SWRESET			S5P_PMUREG(0x00C4)
 
 #define S5P_WAKEUP_STAT				S5P_PMUREG(0x0600)
+#define S5P_EINT_WAKEUP_MASK			S5P_PMUREG(0x0604)
+#define S5P_WAKEUP_MASK				S5P_PMUREG(0x0608)
 
 #define S5P_INFORM0				S5P_PMUREG(0x0800)
 #define S5P_INFORM1				S5P_PMUREG(0x0804)
diff --git a/arch/arm/mach-exynos/sleep.S b/arch/arm/mach-exynos/sleep.S
new file mode 100644
index 0000000..a2613e9
--- /dev/null
+++ b/arch/arm/mach-exynos/sleep.S
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Exynos low-level resume code
+ *
+ * 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.
+ */
+
+#include <linux/linkage.h>
+#include <asm/asm-offsets.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#define CPU_MASK	0xff0ffff0
+#define CPU_CORTEX_A9	0x410fc090
+
+	/*
+	 * The following code is located into the .data section. This is to
+	 * allow l2x0_regs_phys to be accessed with a relative load while we
+	 * can't rely on any MMU translation. We could have put l2x0_regs_phys
+	 * in the .text section as well, but some setups might insist on it to
+	 * be truly read-only. (Reference from: arch/arm/kernel/sleep.S)
+	 */
+	.data
+	.align
+
+	/*
+	 * sleep magic, to allow the bootloader to check for an valid
+	 * image to resume to. Must be the first word before the
+	 * exynos_cpu_resume entry.
+	 */
+
+	.word	0x2bedf00d
+
+	/*
+	 * exynos_cpu_resume
+	 *
+	 * resume code entry for bootloader to call
+	 */
+
+ENTRY(exynos_cpu_resume)
+#ifdef CONFIG_CACHE_L2X0
+	mrc	p15, 0, r0, c0, c0, 0
+	ldr	r1, =CPU_MASK
+	and	r0, r0, r1
+	ldr	r1, =CPU_CORTEX_A9
+	cmp	r0, r1
+	bne	skip_l2_resume
+	adr	r0, l2x0_regs_phys
+	ldr	r0, [r0]
+	cmp	r0, #0
+	beq	skip_l2_resume
+	ldr	r1, [r0, #L2X0_R_PHY_BASE]
+	ldr	r2, [r1, #L2X0_CTRL]
+	tst	r2, #0x1
+	bne	skip_l2_resume
+	ldr	r2, [r0, #L2X0_R_AUX_CTRL]
+	str	r2, [r1, #L2X0_AUX_CTRL]
+	ldr	r2, [r0, #L2X0_R_TAG_LATENCY]
+	str	r2, [r1, #L2X0_TAG_LATENCY_CTRL]
+	ldr	r2, [r0, #L2X0_R_DATA_LATENCY]
+	str	r2, [r1, #L2X0_DATA_LATENCY_CTRL]
+	ldr	r2, [r0, #L2X0_R_PREFETCH_CTRL]
+	str	r2, [r1, #L2X0_PREFETCH_CTRL]
+	ldr	r2, [r0, #L2X0_R_PWR_CTRL]
+	str	r2, [r1, #L2X0_POWER_CTRL]
+	mov	r2, #1
+	str	r2, [r1, #L2X0_CTRL]
+skip_l2_resume:
+#endif
+	b	cpu_resume
+ENDPROC(exynos_cpu_resume)
+#ifdef CONFIG_CACHE_L2X0
+	.globl l2x0_regs_phys
+l2x0_regs_phys:
+	.long	0
+#endif