MERGE-via-pending-tracking-hist-MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-MERGE-via-master-1228302402-1228302766-1228303138

pending-tracking-hist top was MERGE-via-stable-tracking-MERGE-via-mokopatches-tracking-MERGE-via-master-1228302402-1228302766-1228303138 / 27d86638fe294ef1d1a8f527564ec37bb20e7ef2 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-stable-tracking-hist-MERGE-via-mokopatches-tracking-MERGE-via-master-1228302402-1228302766

stable-tracking-hist top was MERGE-via-mokopatches-tracking-MERGE-via-master-1228302402-1228302766 / 66e84c4be853030f1cea816a124cf76a741ecc08 ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-mokopatches-tracking-hist-MERGE-via-master-1228302402

mokopatches-tracking-hist top was MERGE-via-master-1228302402 / de9177f7bd127e9b6fa6213018c7c731b8ca0d0c ... parent commitmessage:
From: merge <null@invalid>
MERGE-via-master-

master top was / 3838a80929f91d35c6d987e518bf9ea397f3e13c ... parent commitmessage:
From: Andy Green <andy@openmoko.com>
fix-wm8753-DBG.patch

Signed-off-by: Andy Green <andy@openmoko.com>

15 files changed, 805 insertions, 37 deletions

diff --git a/arch/arm/plat-s3c64xx/Makefile b/arch/arm/plat-s3c64xx/Makefile
index 2e6d79bf8f3..12ac7a50ab7 100644
--- a/arch/arm/plat-s3c64xx/Makefile
+++ b/arch/arm/plat-s3c64xx/Makefile
@@ -24,6 +24,12 @@ obj-y				+= gpiolib.o
 obj-$(CONFIG_CPU_S3C6400_INIT)	+= s3c6400-init.o
 obj-$(CONFIG_CPU_S3C6400_CLOCK)	+= s3c6400-clock.o
 
+# PM support
+
+obj-$(CONFIG_PM)		+= pm.o
+obj-$(CONFIG_PM)		+= sleep.o
+obj-$(CONFIG_PM)		+= irq-pm.o
+
 # Device setup
 
 obj-$(CONFIG_S3C64XX_SETUP_I2C0) += setup-i2c0.o
diff --git a/arch/arm/plat-s3c64xx/cpu.c b/arch/arm/plat-s3c64xx/cpu.c
index 36182fcfaeb..278a04d5c57 100644
--- a/arch/arm/plat-s3c64xx/cpu.c
+++ b/arch/arm/plat-s3c64xx/cpu.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
+#include <linux/sysdev.h>
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
@@ -100,6 +101,16 @@ static struct map_desc s3c_iodesc[] __initdata = {
 	},
 };
 
+
+struct sysdev_class s3c64xx_sysclass = {
+	.name	= "s3c64xx-core",
+};
+
+static struct sys_device s3c64xx_sysdev = {
+	.cls	= &s3c64xx_sysclass,
+};
+
+
 /* read cpu identification code */
 
 void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
@@ -113,3 +124,11 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
 	idcode = __raw_readl(S3C_VA_SYS + 0x118);
 	s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
 }
+
+static __init int s3c64xx_sysdev_init(void)
+{
+	sysdev_class_register(&s3c64xx_sysclass);
+	return sysdev_register(&s3c64xx_sysdev);
+}
+
+core_initcall(s3c64xx_sysdev_init);
diff --git a/arch/arm/plat-s3c64xx/gpiolib.c b/arch/arm/plat-s3c64xx/gpiolib.c
index cc62941d7b5..09bd681ae73 100644
--- a/arch/arm/plat-s3c64xx/gpiolib.c
+++ b/arch/arm/plat-s3c64xx/gpiolib.c
@@ -385,12 +385,19 @@ static __init void s3c64xx_gpiolib_add_4bit(struct s3c_gpio_chip *chip)
 {
 	chip->chip.direction_input = s3c64xx_gpiolib_4bit_input;
 	chip->chip.direction_output = s3c64xx_gpiolib_4bit_output;
+	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
 }
 
 static __init void s3c64xx_gpiolib_add_4bit2(struct s3c_gpio_chip *chip)
 {
 	chip->chip.direction_input = s3c64xx_gpiolib_4bit2_input;
 	chip->chip.direction_output = s3c64xx_gpiolib_4bit2_output;
+	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
+}
+
+static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip)
+{
+	chip->pm = __gpio_pm(&s3c_gpio_pm_2bit);
 }
 
 static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips,
@@ -412,7 +419,8 @@ static __init int s3c64xx_gpiolib_init(void)
 	s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2),
 			    s3c64xx_gpiolib_add_4bit2);
 
-	s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit), NULL);
+	s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit),
+			    s3c64xx_gpiolib_add_2bit);
 
 	return 0;
 }
diff --git a/arch/arm/plat-s3c64xx/include/plat/irqs.h b/arch/arm/plat-s3c64xx/include/plat/irqs.h
index 02e8dd4c97d..b85085295f0 100644
--- a/arch/arm/plat-s3c64xx/include/plat/irqs.h
+++ b/arch/arm/plat-s3c64xx/include/plat/irqs.h
@@ -157,6 +157,7 @@
 
 #define S3C_EINT(x)		((x) + S3C_IRQ_EINT_BASE)
 #define IRQ_EINT(x)		S3C_EINT(x)
+#define IRQ_EINT_BIT(x)		((x) - S3C_EINT(0))
 
 /* Next the external interrupt groups. These are similar to the IRQ_EINT(x)
  * that they are sourced from the GPIO pins but with a different scheme for
diff --git a/arch/arm/plat-s3c64xx/include/plat/pm-core.h b/arch/arm/plat-s3c64xx/include/plat/pm-core.h
new file mode 100644
index 00000000000..8906c9fd443
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/include/plat/pm-core.h
@@ -0,0 +1,108 @@
+/* linux/arch/arm/plat-s3c64xx/include/plat/pm-core.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX - PM core support for arch/arm/plat-s3c/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.
+ */
+
+#include <plat/regs-gpio.h>
+
+static inline void s3c_pm_debug_init_uart(void)
+{
+	u32 tmp = __raw_readl(S3C_PCLK_GATE);
+
+	/* As a note, since the S3C64XX UARTs generally have multiple
+	 * clock sources, we simply enable PCLK at the momemnt and hope
+	 * that the resume settings for the UART are suitable for the
+	 * use with PCLK.
+	 */
+
+	tmp |= S3C_CLKCON_PCLK_UART0;
+	tmp |= S3C_CLKCON_PCLK_UART1;
+	tmp |= S3C_CLKCON_PCLK_UART2;
+	tmp |= S3C_CLKCON_PCLK_UART3;
+
+	__raw_writel(tmp, S3C_PCLK_GATE);
+	udelay(10);
+}
+
+static inline void s3c_pm_arch_clear_vic(void __iomem *base)
+{
+	__raw_writel(~0, base + VIC_INT_ENABLE_CLEAR);
+	__raw_writel(~0, base + VIC_INT_SOFT_CLEAR);
+}
+
+static inline void s3c_pm_arch_prepare_irqs(void)
+{
+	/* shutdown the VICs */
+	s3c_pm_arch_clear_vic(S3C_VA_VIC0);
+	s3c_pm_arch_clear_vic(S3C_VA_VIC1);
+
+	/* clear any pending EINT0 interrupts */
+	__raw_writel(__raw_readl(S3C64XX_EINT0PEND), S3C64XX_EINT0PEND);
+}
+
+static inline void s3c_pm_arch_stop_clocks(void)
+{
+}
+
+static inline void s3c_pm_arch_show_resume_irqs(void)
+{
+}
+
+/* make these defines, we currently do not have any need to change
+ * the IRQ wake controls depending on the CPU we are running on */
+
+#define s3c_irqwake_eintallow	((1 << 28) - 1)
+#define s3c_irqwake_intallow	(0)
+
+static inline void s3c_pm_arch_update_uart(void __iomem *regs,
+					   struct pm_uart_save *save)
+{
+	u32 ucon = __raw_readl(regs + S3C2410_UCON);
+	u32 ucon_clk = ucon & S3C6400_UCON_CLKMASK;
+	u32 save_clk = save->ucon & S3C6400_UCON_CLKMASK;
+	u32 new_ucon;
+
+	/* S3C64XX UART blocks only support level interrupts, so ensure that
+	 * when we restore unused UART blocks we force the level interrupt
+	 * settigs. */
+	save->ucon |= S3C2410_UCON_TXILEVEL | S3C2410_UCON_RXILEVEL;
+
+	/* We have a constraint on changing the clock type of the UART
+	 * between UCLKx and PCLK, so ensure that when we restore UCON
+	 * that the CLK field is correctly modified if the bootloader
+	 * has changed anything.
+	 */
+	if (ucon_clk != save_clk) {
+		new_ucon = save->ucon;
+		new_ucon &= ~S3C6400_UCON_CLKMASK;
+
+		/* check for illegal change of UCLK, and fixup */
+
+		if (ucon_clk == S3C6400_UCON_UCLK0 &&
+		    save_clk == S3C6400_UCON_PCLK2)
+			new_ucon |= S3C6400_UCON_PCLK;
+
+		if (ucon_clk == S3C6400_UCON_UCLK1 &&
+		    save_clk == S3C6400_UCON_PCLK)
+			new_ucon |= S3C6400_UCON_PCLK2;
+
+		if (ucon_clk == S3C6400_UCON_PCLK &&
+		    save_clk == S3C6400_UCON_PCLK2)
+			new_ucon |= S3C6400_UCON_PCLK;
+
+		if (ucon_clk == S3C6400_UCON_PCLK2 &&
+		    save_clk == S3C6400_UCON_PCLK)
+			new_ucon |= S3C6400_UCON_PCLK2;
+
+		save->ucon = new_ucon;
+	}
+}
diff --git a/arch/arm/plat-s3c64xx/include/plat/regs-clock.h b/arch/arm/plat-s3c64xx/include/plat/regs-clock.h
index b1082c16324..52836d41e33 100644
--- a/arch/arm/plat-s3c64xx/include/plat/regs-clock.h
+++ b/arch/arm/plat-s3c64xx/include/plat/regs-clock.h
@@ -32,6 +32,7 @@
 #define S3C_HCLK_GATE		S3C_CLKREG(0x30)
 #define S3C_PCLK_GATE		S3C_CLKREG(0x34)
 #define S3C_SCLK_GATE		S3C_CLKREG(0x38)
+#define S3C_MEM0_GATE		S3C_CLKREG(0x3C)
 
 /* CLKDIV0 */
 #define S3C6400_CLKDIV0_MFC_MASK	(0xf << 28)
diff --git a/arch/arm/plat-s3c64xx/include/plat/regs-gpio.h b/arch/arm/plat-s3c64xx/include/plat/regs-gpio.h
index 75b873d8280..17944803a32 100644
--- a/arch/arm/plat-s3c64xx/include/plat/regs-gpio.h
+++ b/arch/arm/plat-s3c64xx/include/plat/regs-gpio.h
@@ -13,23 +13,90 @@
 
 /* Base addresses for each of the banks */
 
-#define S3C64XX_GPA_BASE	(S3C64XX_VA_GPIO + 0x0000)
-#define S3C64XX_GPB_BASE	(S3C64XX_VA_GPIO + 0x0020)
-#define S3C64XX_GPC_BASE	(S3C64XX_VA_GPIO + 0x0040)
-#define S3C64XX_GPD_BASE	(S3C64XX_VA_GPIO + 0x0060)
-#define S3C64XX_GPE_BASE	(S3C64XX_VA_GPIO + 0x0080)
-#define S3C64XX_GPF_BASE	(S3C64XX_VA_GPIO + 0x00A0)
-#define S3C64XX_GPG_BASE	(S3C64XX_VA_GPIO + 0x00C0)
-#define S3C64XX_GPH_BASE	(S3C64XX_VA_GPIO + 0x00E0)
-#define S3C64XX_GPI_BASE	(S3C64XX_VA_GPIO + 0x0100)
-#define S3C64XX_GPJ_BASE	(S3C64XX_VA_GPIO + 0x0120)
-#define S3C64XX_GPK_BASE	(S3C64XX_VA_GPIO + 0x0800)
-#define S3C64XX_GPL_BASE	(S3C64XX_VA_GPIO + 0x0810)
-#define S3C64XX_GPM_BASE	(S3C64XX_VA_GPIO + 0x0820)
-#define S3C64XX_GPN_BASE	(S3C64XX_VA_GPIO + 0x0830)
-#define S3C64XX_GPO_BASE	(S3C64XX_VA_GPIO + 0x0140)
-#define S3C64XX_GPP_BASE	(S3C64XX_VA_GPIO + 0x0160)
-#define S3C64XX_GPQ_BASE	(S3C64XX_VA_GPIO + 0x0180)
+#define S3C64XX_GPIOREG(reg)	(S3C64XX_VA_GPIO + (reg))
+
+#define S3C64XX_GPA_BASE	S3C64XX_GPIOREG(0x0000)
+#define S3C64XX_GPB_BASE	S3C64XX_GPIOREG(0x0020)
+#define S3C64XX_GPC_BASE	S3C64XX_GPIOREG(0x0040)
+#define S3C64XX_GPD_BASE	S3C64XX_GPIOREG(0x0060)
+#define S3C64XX_GPE_BASE	S3C64XX_GPIOREG(0x0080)
+#define S3C64XX_GPF_BASE	S3C64XX_GPIOREG(0x00A0)
+#define S3C64XX_GPG_BASE	S3C64XX_GPIOREG(0x00C0)
+#define S3C64XX_GPH_BASE	S3C64XX_GPIOREG(0x00E0)
+#define S3C64XX_GPI_BASE	S3C64XX_GPIOREG(0x0100)
+#define S3C64XX_GPJ_BASE	S3C64XX_GPIOREG(0x0120)
+#define S3C64XX_GPK_BASE	S3C64XX_GPIOREG(0x0800)
+#define S3C64XX_GPL_BASE	S3C64XX_GPIOREG(0x0810)
+#define S3C64XX_GPM_BASE	S3C64XX_GPIOREG(0x0820)
+#define S3C64XX_GPN_BASE	S3C64XX_GPIOREG(0x0830)
+#define S3C64XX_GPO_BASE	S3C64XX_GPIOREG(0x0140)
+#define S3C64XX_GPP_BASE	S3C64XX_GPIOREG(0x0160)
+#define S3C64XX_GPQ_BASE	S3C64XX_GPIOREG(0x0180)
+
+/* External interrupt registers */
+
+#define S3C64XX_EINT12CON	S3C64XX_GPIOREG(0x200)
+#define S3C64XX_EINT34CON	S3C64XX_GPIOREG(0x204)
+#define S3C64XX_EINT56CON	S3C64XX_GPIOREG(0x208)
+#define S3C64XX_EINT78CON	S3C64XX_GPIOREG(0x20C)
+#define S3C64XX_EINT9CON	S3C64XX_GPIOREG(0x210)
+
+#define S3C64XX_EINT12FLTCON	S3C64XX_GPIOREG(0x220)
+#define S3C64XX_EINT34FLTCON	S3C64XX_GPIOREG(0x224)
+#define S3C64XX_EINT56FLTCON	S3C64XX_GPIOREG(0x228)
+#define S3C64XX_EINT78FLTCON	S3C64XX_GPIOREG(0x22C)
+#define S3C64XX_EINT9FLTCON	S3C64XX_GPIOREG(0x230)
+
+#define S3C64XX_EINT12MASK	S3C64XX_GPIOREG(0x240)
+#define S3C64XX_EINT34MASK	S3C64XX_GPIOREG(0x244)
+#define S3C64XX_EINT56MASK	S3C64XX_GPIOREG(0x248)
+#define S3C64XX_EINT78MASK	S3C64XX_GPIOREG(0x24C)
+#define S3C64XX_EINT9MASK	S3C64XX_GPIOREG(0x250)
+
+#define S3C64XX_EINT12PEND	S3C64XX_GPIOREG(0x260)
+#define S3C64XX_EINT34PEND	S3C64XX_GPIOREG(0x264)
+#define S3C64XX_EINT56PEND	S3C64XX_GPIOREG(0x268)
+#define S3C64XX_EINT78PEND	S3C64XX_GPIOREG(0x26C)
+#define S3C64XX_EINT9PEND	S3C64XX_GPIOREG(0x270)
+
+#define S3C64XX_PRIORITY	S3C64XX_GPIOREG(0x280)
+#define S3C64XX_PRIORITY_ARB(x)	(1 << (x))
+
+#define S3C64XX_SERVICE		S3C64XX_GPIOREG(0x284)
+#define S3C64XX_SERVICEPEND	S3C64XX_GPIOREG(0x288)
+
+#define S3C64XX_EINT0CON0	S3C64XX_GPIOREG(0x900)
+#define S3C64XX_EINT0CON1	S3C64XX_GPIOREG(0x904)
+#define S3C64XX_EINT0FLTCON0	S3C64XX_GPIOREG(0x910)
+#define S3C64XX_EINT0FLTCON1	S3C64XX_GPIOREG(0x914)
+#define S3C64XX_EINT0FLTCON2	S3C64XX_GPIOREG(0x918)
+#define S3C64XX_EINT0FLTCON3	S3C64XX_GPIOREG(0x91C)
+
+#define S3C64XX_EINT0MASK	S3C64XX_GPIOREG(0x920)
+#define S3C64XX_EINT0PEND	S3C64XX_GPIOREG(0x924)
+
+/* GPIO sleep configuration */
+
+#define S3C64XX_SPCONSLP	S3C64XX_GPIOREG(0x880)
+
+#define S3C64XX_SPCONSLP_TDO_PULLDOWN	(1 << 14)
+#define S3C64XX_SPCONSLP_CKE1INIT	(1 << 5)
+
+#define S3C64XX_SPCONSLP_RSTOUT_MASK	(0x3 << 12)
+#define S3C64XX_SPCONSLP_RSTOUT_OUT0	(0x0 << 12)
+#define S3C64XX_SPCONSLP_RSTOUT_OUT1	(0x1 << 12)
+#define S3C64XX_SPCONSLP_RSTOUT_HIZ	(0x2 << 12)
+
+#define S3C64XX_SPCONSLP_KPCOL_MASK	(0x3 << 0)
+#define S3C64XX_SPCONSLP_KPCOL_OUT0	(0x0 << 0)
+#define S3C64XX_SPCONSLP_KPCOL_OUT1	(0x1 << 0)
+#define S3C64XX_SPCONSLP_KPCOL_INP	(0x2 << 0)
+
+
+#define S3C64XX_SLPEN		S3C64XX_GPIOREG(0x930)
+
+#define S3C64XX_SLPEN_USE_xSLP		(1 << 0)
+#define S3C64XX_SLPEN_CFG_BYSLPEN	(1 << 1)
 
 #endif /* __ASM_PLAT_S3C64XX_REGS_GPIO_H */
 
diff --git a/arch/arm/plat-s3c64xx/include/plat/regs-sys.h b/arch/arm/plat-s3c64xx/include/plat/regs-sys.h
index d8ed8291709..69b78d9f83b 100644
--- a/arch/arm/plat-s3c64xx/include/plat/regs-sys.h
+++ b/arch/arm/plat-s3c64xx/include/plat/regs-sys.h
@@ -17,6 +17,10 @@
 
 #define S3C_SYSREG(x)		(S3C_VA_SYS + (x))
 
+#define S3C64XX_AHB_CON0	S3C_SYSREG(0x100)
+#define S3C64XX_AHB_CON1	S3C_SYSREG(0x104)
+#define S3C64XX_AHB_CON2	S3C_SYSREG(0x108)
+
 #define S3C64XX_OTHERS		S3C_SYSREG(0x900)
 
 #define S3C64XX_OTHERS_USBMASK	(1 << 16)
diff --git a/arch/arm/plat-s3c64xx/include/plat/regs-syscon-power.h b/arch/arm/plat-s3c64xx/include/plat/regs-syscon-power.h
new file mode 100644
index 00000000000..1b155fcb03b
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/include/plat/regs-syscon-power.h
@@ -0,0 +1,113 @@
+/* arch/arm/plat-s3c64xx/include/plat/regs-syscon-power.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      http://armlinux.simtec.co.uk/
+ *      Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C64XX - syscon power and sleep control registers
+ *
+ * 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 __PLAT_S3C64XX_REGS_SYSCON_POWER_H
+#define __PLAT_S3C64XX_REGS_SYSCON_POWER_H __FILE__
+
+#define S3C64XX_PWR_CFG				S3C_SYSREG(0x804)
+
+#define S3C64XX_PWRCFG_OSC_OTG_DISABLE		(1 << 17)
+#define S3C64XX_PWRCFG_MMC2_DISABLE		(1 << 16)
+#define S3C64XX_PWRCFG_MMC1_DISABLE		(1 << 15)
+#define S3C64XX_PWRCFG_MMC0_DISABLE		(1 << 14)
+#define S3C64XX_PWRCFG_HSI_DISABLE		(1 << 13)
+#define S3C64XX_PWRCFG_TS_DISABLE		(1 << 12)
+#define S3C64XX_PWRCFG_RTC_TICK_DISABLE		(1 << 11)
+#define S3C64XX_PWRCFG_RTC_ALARM_DISABLE	(1 << 10)
+#define S3C64XX_PWRCFG_MSM_DISABLE		(1 << 9)
+#define S3C64XX_PWRCFG_KEY_DISABLE		(1 << 8)
+#define S3C64XX_PWRCFG_BATF_DISABLE		(1 << 7)
+
+#define S3C64XX_PWRCFG_CFG_WFI_MASK		(0x3 << 5)
+#define S3C64XX_PWRCFG_CFG_WFI_SHIFT		(5)
+#define S3C64XX_PWRCFG_CFG_WFI_IGNORE		(0x0 << 5)
+#define S3C64XX_PWRCFG_CFG_WFI_IDLE		(0x1 << 5)
+#define S3C64XX_PWRCFG_CFG_WFI_STOP		(0x2 << 5)
+#define S3C64XX_PWRCFG_CFG_WFI_SLEEP		(0x3 << 5)
+
+#define S3C64XX_PWRCFG_CFG_BATFLT_MASK		(0x3 << 3)
+#define S3C64XX_PWRCFG_CFG_BATFLT_SHIFT		(3)
+#define S3C64XX_PWRCFG_CFG_BATFLT_IGNORE	(0x0 << 3)
+#define S3C64XX_PWRCFG_CFG_BATFLT_IRQ		(0x1 << 3)
+#define S3C64XX_PWRCFG_CFG_BATFLT_SLEEP		(0x3 << 3)
+
+#define S3C64XX_PWRCFG_CFG_BAT_WAKE		(1 << 2)
+#define S3C64XX_PWRCFG_OSC27_EN			(1 << 0)
+
+#define S3C64XX_EINT_MASK			S3C_SYSREG(0x808)
+
+#define S3C64XX_NORMAL_CFG			S3C_SYSREG(0x810)
+
+#define S3C64XX_NORMALCFG_IROM_ON		(1 << 30)
+#define S3C64XX_NORMALCFG_DOMAIN_ETM_ON		(1 << 16)
+#define S3C64XX_NORMALCFG_DOMAIN_S_ON		(1 << 15)
+#define S3C64XX_NORMALCFG_DOMAIN_F_ON		(1 << 14)
+#define S3C64XX_NORMALCFG_DOMAIN_P_ON		(1 << 13)
+#define S3C64XX_NORMALCFG_DOMAIN_I_ON		(1 << 12)
+#define S3C64XX_NORMALCFG_DOMAIN_G_ON		(1 << 10)
+#define S3C64XX_NORMALCFG_DOMAIN_V_ON		(1 << 9)
+
+#define S3C64XX_STOP_CFG			S3C_SYSREG(0x814)
+
+#define S3C64XX_STOPCFG_MEMORY_ARM_ON		(1 << 29)
+#define S3C64XX_STOPCFG_TOP_MEMORY_ON		(1 << 20)
+#define S3C64XX_STOPCFG_ARM_LOGIC_ON		(1 << 17)
+#define S3C64XX_STOPCFG_TOP_LOGIC_ON		(1 << 8)
+#define S3C64XX_STOPCFG_OSC_EN			(1 << 0)
+
+#define S3C64XX_SLEEP_CFG			S3C_SYSREG(0x818)
+
+#define S3C64XX_SLEEPCFG_OSC_EN			(1 << 0)
+
+#define S3C64XX_STOP_MEM_CFG			S3C_SYSREG(0x81c)
+
+#define S3C64XX_STOPMEMCFG_MODEMIF_RETAIN	(1 << 6)
+#define S3C64XX_STOPMEMCFG_HOSTIF_RETAIN	(1 << 5)
+#define S3C64XX_STOPMEMCFG_OTG_RETAIN		(1 << 4)
+#define S3C64XX_STOPMEMCFG_HSMCC_RETAIN		(1 << 3)
+#define S3C64XX_STOPMEMCFG_IROM_RETAIN		(1 << 2)
+#define S3C64XX_STOPMEMCFG_IRDA_RETAIN		(1 << 1)
+#define S3C64XX_STOPMEMCFG_NFCON_RETAIN		(1 << 0)
+
+#define S3C64XX_WAKEUP_STAT			S3C_SYSREG(0x908)
+
+#define S3C64XX_WAKEUPSTAT_MMC2			(1 << 11)
+#define S3C64XX_WAKEUPSTAT_MMC1			(1 << 10)
+#define S3C64XX_WAKEUPSTAT_MMC0			(1 << 9)
+#define S3C64XX_WAKEUPSTAT_HSI			(1 << 8)
+#define S3C64XX_WAKEUPSTAT_BATFLT		(1 << 6)
+#define S3C64XX_WAKEUPSTAT_MSM			(1 << 5)
+#define S3C64XX_WAKEUPSTAT_KEY			(1 << 4)
+#define S3C64XX_WAKEUPSTAT_TS			(1 << 3)
+#define S3C64XX_WAKEUPSTAT_RTC_TICK		(1 << 2)
+#define S3C64XX_WAKEUPSTAT_RTC_ALARM		(1 << 1)
+#define S3C64XX_WAKEUPSTAT_EINT			(1 << 0)
+
+#define S3C64XX_BLK_PWR_STAT			S3C_SYSREG(0x90c)
+
+#define S3C64XX_BLKPWRSTAT_G			(1 << 7)
+#define S3C64XX_BLKPWRSTAT_ETM			(1 << 6)
+#define S3C64XX_BLKPWRSTAT_S			(1 << 5)
+#define S3C64XX_BLKPWRSTAT_F			(1 << 4)
+#define S3C64XX_BLKPWRSTAT_P			(1 << 3)
+#define S3C64XX_BLKPWRSTAT_I			(1 << 2)
+#define S3C64XX_BLKPWRSTAT_V			(1 << 1)
+#define S3C64XX_BLKPWRSTAT_TOP			(1 << 0)
+
+#define S3C64XX_INFORM0				S3C_SYSREG(0xA00)
+#define S3C64XX_INFORM1				S3C_SYSREG(0xA04)
+#define S3C64XX_INFORM2				S3C_SYSREG(0xA08)
+#define S3C64XX_INFORM3				S3C_SYSREG(0xA0C)
+
+#endif /* __PLAT_S3C64XX_REGS_SYSCON_POWER_H */
diff --git a/arch/arm/plat-s3c64xx/irq-eint.c b/arch/arm/plat-s3c64xx/irq-eint.c
index a57636137a6..90654adbb48 100644
--- a/arch/arm/plat-s3c64xx/irq-eint.c
+++ b/arch/arm/plat-s3c64xx/irq-eint.c
@@ -20,23 +20,11 @@
 #include <asm/hardware/vic.h>
 
 #include <plat/regs-irqtype.h>
+#include <plat/regs-gpio.h>
 
 #include <mach/map.h>
 #include <plat/cpu.h>
-
-/* GPIO is 0x7F008xxx, */
-#define S3C64XX_GPIOREG(x)	(S3C64XX_VA_GPIO + (x))
-
-#define S3C64XX_EINT0CON0	S3C64XX_GPIOREG(0x900)
-#define S3C64XX_EINT0CON1	S3C64XX_GPIOREG(0x904)
-#define S3C64XX_EINT0FLTCON0	S3C64XX_GPIOREG(0x910)
-#define S3C64XX_EINT0FLTCON1	S3C64XX_GPIOREG(0x914)
-#define S3C64XX_EINT0FLTCON2	S3C64XX_GPIOREG(0x918)
-#define S3C64XX_EINT0FLTCON3	S3C64XX_GPIOREG(0x91C)
-
-#define S3C64XX_EINT0MASK	S3C64XX_GPIOREG(0x920)
-#define S3C64XX_EINT0PEND	S3C64XX_GPIOREG(0x924)
-
+#include <plat/pm.h>
 
 #define eint_offset(irq)	((irq) - IRQ_EINT(0))
 #define eint_irq_to_bit(irq)	(1 << eint_offset(irq))
@@ -46,7 +34,7 @@ static inline void s3c_irq_eint_mask(unsigned int irq)
 	u32 mask;
 
 	mask = __raw_readl(S3C64XX_EINT0MASK);
-	mask |= eint_irq_to_bit(irq);
+	mask &= ~eint_irq_to_bit(irq);
 	__raw_writel(mask, S3C64XX_EINT0MASK);
 }
 
@@ -145,6 +133,7 @@ static struct irq_chip s3c_irq_eint = {
 	.mask_ack	= s3c_irq_eint_maskack,
 	.ack		= s3c_irq_eint_ack,
 	.set_type	= s3c_irq_eint_set_type,
+	.set_wake	= s3c_irqext_wake,
 };
 
 /* s3c_irq_demux_eint
diff --git a/arch/arm/plat-s3c64xx/irq-pm.c b/arch/arm/plat-s3c64xx/irq-pm.c
new file mode 100644
index 00000000000..fd705faf335
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/irq-pm.c
@@ -0,0 +1,160 @@
+/* arch/arm/plat-s3c64xx/irq-pm.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX - Interrupt handling Power Managment
+ *
+ * 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/sysdev.h>
+#include <linux/interrupt.h>
+#include <linux/serial_core.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+
+#include <asm/hardware/vic.h>
+
+#include <mach/map.h>
+
+#include <plat/regs-serial.h>
+#include <plat/regs-timer.h>
+#include <plat/regs-gpio.h>
+#include <plat/cpu.h>
+#include <plat/pm.h>
+
+/* We handled all the IRQ types in this code, to save having to make several
+ * small files to handle each different type seperately. Having the EINT_GRP
+ * code here shouldn't be as much bloat as the IRQ table space needed when
+ * they are enabled. The added benefit is we ensure that these registers are
+ * in the same state as we suspsended.
+ */
+
+static struct sleep_save irq_save[] = {
+	SAVE_ITEM(S3C64XX_PRIORITY),
+	SAVE_ITEM(S3C64XX_EINT0CON0),
+	SAVE_ITEM(S3C64XX_EINT0CON1),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON0),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON1),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON2),
+	SAVE_ITEM(S3C64XX_EINT0FLTCON3),
+	SAVE_ITEM(S3C64XX_EINT0MASK),
+	SAVE_ITEM(S3C64XX_TINT_CSTAT),
+};
+
+static struct irq_grp_save {
+	u32	fltcon;
+	u32	con;
+	u32	mask;
+} eint_grp_save[5];
+
+struct irq_vic_save {
+	u32	int_select;
+	u32	int_enable;
+	u32	protect;
+	u32	vect_addr[32];
+	u32	vect_cntl[32];
+};
+
+static struct irq_vic_save irq_pm_vic0_save;
+static struct irq_vic_save irq_pm_vic1_save;
+
+static u32 irq_uart_mask[CONFIG_SERIAL_SAMSUNG_UARTS];
+
+static void s3c64xx_vic_save(void __iomem *base, struct irq_vic_save *save)
+{
+	int v;
+
+	save->int_select = readl(base + VIC_INT_SELECT);
+	save->int_enable = readl(base + VIC_INT_ENABLE);
+	save->protect = readl(base + VIC_PROTECT);
+
+	for (v = 0; v < ARRAY_SIZE(save->vect_addr); v++) {
+		save->vect_addr[v] = readl(base + VIC_VECT_ADDR0 + (v * 4));
+		save->vect_cntl[v] = readl(base + VIC_VECT_CNTL0 + (v * 4));
+	}
+}
+
+static void s3c64xx_vic_restore(void __iomem *base, struct irq_vic_save *save)
+{
+	int v;
+
+	writel(save->int_select, base + VIC_INT_SELECT);
+	writel(save->protect, base + VIC_PROTECT);
+
+	/* set the enabled ints and then clear the non-enabled */
+	writel(save->int_enable, base + VIC_INT_ENABLE);
+	writel(~save->int_enable, base + VIC_INT_ENABLE_CLEAR);
+
+	for (v = 0; v < ARRAY_SIZE(save->vect_addr); v++) {
+		writel(save->vect_addr[v], base + VIC_VECT_ADDR0 + (v * 4));
+		writel(save->vect_cntl[v], base + VIC_VECT_CNTL0 + (v * 4));
+	}
+}
+
+static int s3c64xx_irq_pm_suspend(struct sys_device *dev, pm_message_t state)
+{
+	struct irq_grp_save *grp = eint_grp_save;
+	int i;
+
+	S3C_PMDBG("%s: suspending IRQs\n");
+
+	s3c64xx_vic_save(S3C_VA_VIC0, &irq_pm_vic0_save);
+	s3c64xx_vic_save(S3C_VA_VIC1, &irq_pm_vic1_save);
+
+	s3c_pm_do_save(irq_save, ARRAY_SIZE(irq_save));
+
+	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+		irq_uart_mask[i] = __raw_readl(S3C_VA_UARTx(i) + S3C64XX_UINTM);
+
+	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
+		grp->con = __raw_readl(S3C64XX_EINT12CON + (i * 4));
+		grp->mask = __raw_readl(S3C64XX_EINT12MASK + (i * 4));
+		grp->fltcon = __raw_readl(S3C64XX_EINT12FLTCON + (i * 4));
+	}
+
+	return 0;
+}
+
+static int s3c64xx_irq_pm_resume(struct sys_device *dev)
+{
+	struct irq_grp_save *grp = eint_grp_save;
+	int i;
+
+	S3C_PMDBG("%s: resuming IRQs\n");
+
+	s3c_pm_do_restore(irq_save, ARRAY_SIZE(irq_save));
+
+	s3c64xx_vic_restore(S3C_VA_VIC0, &irq_pm_vic0_save);
+	s3c64xx_vic_restore(S3C_VA_VIC1, &irq_pm_vic1_save);
+
+	for (i = 0; i < CONFIG_SERIAL_SAMSUNG_UARTS; i++)
+		__raw_writel(irq_uart_mask[i], S3C_VA_UARTx(i) + S3C64XX_UINTM);
+
+	for (i = 0; i < ARRAY_SIZE(eint_grp_save); i++, grp++) {
+		__raw_writel(grp->con, S3C64XX_EINT12CON + (i * 4));
+		__raw_writel(grp->mask, S3C64XX_EINT12MASK + (i * 4));
+		__raw_writel(grp->fltcon, S3C64XX_EINT12FLTCON + (i * 4));
+	}
+
+	return 0;
+}
+
+static struct sysdev_driver s3c64xx_irq_driver = {
+	.suspend = s3c64xx_irq_pm_suspend,
+	.resume	 = s3c64xx_irq_pm_resume,
+};
+
+static int __init s3c64xx_irq_pm_init(void)
+{
+	return sysdev_driver_register(&s3c64xx_sysclass, &s3c64xx_irq_driver);
+}
+
+arch_initcall(s3c64xx_irq_pm_init);
+
diff --git a/arch/arm/plat-s3c64xx/irq.c b/arch/arm/plat-s3c64xx/irq.c
index a94f1d5e819..12e9d689b15 100644
--- a/arch/arm/plat-s3c64xx/irq.c
+++ b/arch/arm/plat-s3c64xx/irq.c
@@ -14,12 +14,14 @@
 
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
+#include <linux/serial_core.h>
 #include <linux/irq.h>
 #include <linux/io.h>
 
 #include <asm/hardware/vic.h>
 
 #include <mach/map.h>
+#include <plat/regs-serial.h>
 #include <plat/regs-timer.h>
 #include <plat/cpu.h>
 
@@ -135,9 +137,6 @@ static inline unsigned int s3c_irq_uart_bit(unsigned int irq)
 }
 
 /* UART interrupt registers, not worth adding to seperate include header */
-#define S3C64XX_UINTP	0x30
-#define S3C64XX_UINTSP	0x34
-#define S3C64XX_UINTM	0x38
 
 static void s3c_irq_uart_mask(unsigned int irq)
 {
@@ -252,6 +251,8 @@ void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid)
 
 	for (uart = 0; uart < ARRAY_SIZE(uart_irqs); uart++)
 		s3c64xx_uart_irq(&uart_irqs[uart]);
+
 }
 
 
+
diff --git a/arch/arm/plat-s3c64xx/pm.c b/arch/arm/plat-s3c64xx/pm.c
new file mode 100644
index 00000000000..539a93b1b88
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/pm.c
@@ -0,0 +1,157 @@
+/* linux/arch/arm/plat-s3c64xx/pm.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX CPU PM 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.
+*/
+
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/serial_core.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+
+#include <plat/pm.h>
+#include <plat/regs-sys.h>
+#include <plat/regs-gpio.h>
+#include <plat/regs-clock.h>
+#include <plat/regs-syscon-power.h>
+
+#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
+#include <plat/gpio-bank-n.h>
+
+void s3c_pm_debug_smdkled(u32 set, u32 clear)
+{
+	unsigned long flags;
+	u32 reg;
+
+	local_irq_save(flags);
+	reg = __raw_readl(S3C64XX_GPNCON);
+	reg &= ~(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) |
+		 S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15));
+	reg |= S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) |
+	       S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15);
+	__raw_writel(reg, S3C64XX_GPNCON);
+
+	reg = __raw_readl(S3C64XX_GPNDAT);
+	reg &= ~(clear << 12);
+	reg |= set << 12;
+	__raw_writel(reg, S3C64XX_GPNDAT);
+
+	local_irq_restore(flags);
+}
+#endif
+
+static struct sleep_save core_save[] = {
+	SAVE_ITEM(S3C_APLL_LOCK),
+	SAVE_ITEM(S3C_MPLL_LOCK),
+	SAVE_ITEM(S3C_EPLL_LOCK),
+	SAVE_ITEM(S3C_CLK_SRC),
+	SAVE_ITEM(S3C_CLK_DIV0),
+	SAVE_ITEM(S3C_CLK_DIV1),
+	SAVE_ITEM(S3C_CLK_DIV2),
+	SAVE_ITEM(S3C_CLK_OUT),
+	SAVE_ITEM(S3C_HCLK_GATE),
+	SAVE_ITEM(S3C_PCLK_GATE),
+	SAVE_ITEM(S3C_SCLK_GATE),
+	SAVE_ITEM(S3C_MEM0_GATE),
+
+	SAVE_ITEM(S3C_EPLL_CON1),
+	SAVE_ITEM(S3C_EPLL_CON0),
+
+#ifndef CONFIG_CPU_FREQ
+	SAVE_ITEM(S3C_APLL_CON),
+	SAVE_ITEM(S3C_MPLL_CON),
+#endif
+};
+
+static struct sleep_save misc_save[] = {
+	SAVE_ITEM(S3C64XX_AHB_CON0),
+	SAVE_ITEM(S3C64XX_AHB_CON1),
+	SAVE_ITEM(S3C64XX_AHB_CON2),
+};
+
+void s3c_pm_configure_extint(void)
+{
+	__raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
+	__raw_writel(s3c_irqwake_eintmask, S3C64XX_EINT_MASK);
+}
+
+void s3c_pm_restore_core(void)
+{
+	__raw_writel(0, S3C64XX_EINT_MASK);
+
+	s3c_pm_debug_smdkled(1 << 2, 0);
+
+	s3c_pm_do_restore_core(core_save, ARRAY_SIZE(core_save));
+	s3c_pm_do_restore(misc_save, ARRAY_SIZE(misc_save));
+}
+
+void s3c_pm_save_core(void)
+{
+	s3c_pm_do_save(misc_save, ARRAY_SIZE(misc_save));
+	s3c_pm_do_save(core_save, ARRAY_SIZE(core_save));
+}
+
+/* since both s3c6400 and s3c6410 share the same sleep pm calls, we
+ * put the per-cpu code in here until any new cpu comes along and changes
+ * this.
+ */
+
+static void s3c64xx_cpu_suspend(void)
+{
+	unsigned long tmp;
+
+	/* set our standby method to sleep */
+
+	tmp = __raw_readl(S3C64XX_PWR_CFG);
+	tmp &= ~S3C64XX_PWRCFG_CFG_WFI_MASK;
+	tmp |= S3C64XX_PWRCFG_CFG_WFI_SLEEP;
+	__raw_writel(tmp, S3C64XX_PWR_CFG);
+
+	/* set the LED state to 0110 over sleep */
+	s3c_pm_debug_smdkled(3 << 1, 0xf);
+
+	/* issue the standby signal into the pm unit. Note, we
+	 * issue a write-buffer drain just in case */
+
+	tmp = 0;
+
+	asm("b 1f\n\t"
+	    ".align 5\n\t"
+	    "1:\n\t"
+	    "mcr p15, 0, %0, c7, c10, 5\n\t"
+	    "mcr p15, 0, %0, c7, c10, 4\n\t"
+	    "mcr p15, 0, %0, c7, c0, 4" :: "r" (tmp));
+
+	/* we should never get past here */
+
+	panic("sleep resumed to originator?");
+}
+
+static void s3c64xx_pm_prepare(void)
+{
+	/* store address of resume. */
+	__raw_writel(virt_to_phys(s3c_cpu_resume), S3C64XX_INFORM0);
+
+	/* ensure previous wakeup state is cleared before sleeping */
+	__raw_writel(__raw_readl(S3C64XX_WAKEUP_STAT), S3C64XX_WAKEUP_STAT);
+}
+
+static int s3c64xx_pm_init(void)
+{
+	pm_cpu_prep = s3c64xx_pm_prepare;
+	pm_cpu_sleep = s3c64xx_cpu_suspend;
+	pm_uart_udivslot = 1;
+	return 0;
+}
+
+arch_initcall(s3c64xx_pm_init);
diff --git a/arch/arm/plat-s3c64xx/s3c6400-clock.c b/arch/arm/plat-s3c64xx/s3c6400-clock.c
index 8d9a0cada66..a6f6b91b732 100644
--- a/arch/arm/plat-s3c64xx/s3c6400-clock.c
+++ b/arch/arm/plat-s3c64xx/s3c6400-clock.c
@@ -650,6 +650,5 @@ void __init s3c6400_register_clocks(void)
 		}
 	}
 
-	clk_mpll.parent = &clk_mout_mpll.clk;
 	clk_epll.parent = &clk_mout_epll.clk;
 }
diff --git a/arch/arm/plat-s3c64xx/sleep.S b/arch/arm/plat-s3c64xx/sleep.S
new file mode 100644
index 00000000000..8b96f2f0e06
--- /dev/null
+++ b/arch/arm/plat-s3c64xx/sleep.S
@@ -0,0 +1,135 @@
+/* linux/0arch/arm/plat-s3c64xx/sleep.S
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *	Ben Dooks <ben@simtec.co.uk>
+ *	http://armlinux.simtec.co.uk/
+ *
+ * S3C64XX CPU sleep code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <mach/map.h>
+
+#undef S3C64XX_VA_GPIO
+#define S3C64XX_VA_GPIO (0x0)
+
+#include <plat/regs-gpio.h>
+#include <plat/gpio-bank-n.h>
+
+#define LL_UART (S3C_PA_UART + (0x400 * CONFIG_S3C_LOWLEVEL_UART_PORT))
+
+	.text
+
+	/* s3c_cpu_save
+	 *
+	 * Save enough processor state to allow the restart of the pm.c
+	 * code after resume.
+	 *
+	 * entry:
+	 *	r0 = pointer to the save block
+	 * exit:
+	 *	r0 = exit code: 1 => stored data
+	 *			0 => resumed from sleep
+	*/
+
+ENTRY(s3c_cpu_save)
+	stmfd	sp!, { r4 - r12, lr }
+
+	mrc	p15, 0, r4, c13, c0, 0	@ FCSE/PID
+	mrc	p15, 0, r5, c3, c0, 0	@ Domain ID
+	mrc	p15, 0, r6, c2, c0, 0	@ Translation Table BASE0
+	mrc	p15, 0, r7, c2, c0, 1	@ Translation Table BASE1
+	mrc	p15, 0, r8, c2, c0, 2	@ Translation Table Control
+	mrc	p15, 0, r9, c1, c0, 0	@ Control register
+
+	stmia	r0, { r4 - r13 }	@ Save CP registers and SP
+	mov	r0, #0
+	ldmfd	sp, { r4 - r12, pc }	@ return, not disturbing SP
+
+	@@ return to the caller, after the MMU is turned on.
+	@@ restore the last bits of the stack and return.
+resume_with_mmu:
+	mov	r0, #1
+	ldmfd	sp!, { r4 - r12, pc }	@ return, from sp from s3c_cpu_save
+
+	.data
+
+	/* the next bit is code, but it requires easy access to the
+	 * s3c_sleep_save_phys data before the MMU is switched on, so
+	 * we store the code that needs this variable in the .data where
+	 * the value can be written to (the .text segment is RO).
+	*/
+
+	.global	s3c_sleep_save_phys
+s3c_sleep_save_phys:
+	.word	0
+
+	/* Sleep magic, the word before the resume entry point so that the
+	 * bootloader can check for a resumeable image. */
+
+	.word	0x2bedf00d
+
+	/* s3c_cpu_reusme
+	 *
+	 * This is the entry point, stored by whatever method the bootloader
+	 * requires to get the kernel runnign again. This code expects to be
+	 * entered with no caches live and the MMU disabled. It will then
+	 * restore the MMU and other basic CP registers saved and restart
+	 * the kernel C code to finish the resume code.
+	*/
+
+ENTRY(s3c_cpu_resume)
+	msr	cpsr_c, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
+	ldr	r2, =LL_UART		/* for debug */
+
+#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
+	/* Initialise the GPIO state if we are debugging via the SMDK LEDs,
+	 * as the uboot version supplied resets these to inputs during the
+	 * resume checks.
+	*/
+
+	ldr	r3, =S3C64XX_PA_GPIO
+	ldr	r0, [ r3, #S3C64XX_GPNCON ]
+	bic	r0, r0, #(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) | \
+			  S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15))
+	orr	r0, r0, #(S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) | \
+			  S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15))
+	str	r0, [ r3, #S3C64XX_GPNCON ]
+
+	ldr	r0, [ r3, #S3C64XX_GPNDAT ]
+	bic	r0, r0, #0xf << 12			@ GPN12..15
+	orr	r0, r0, #1 << 15			@ GPN15
+	str	r0, [ r3, #S3C64XX_GPNDAT ]
+#endif
+
+	/* __v6_setup from arch/arm/mm/proc-v6.S, ensure that the caches
+	 * are thorougly cleaned just in case the bootloader didn't do it
+	 * for us. */
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c14, 0		@ clean+invalidate D cache
+	mcr	p15, 0, r0, c7, c5, 0		@ invalidate I cache
+	mcr	p15, 0, r0, c7, c15, 0		@ clean+invalidate cache
+	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer
+	mcr	p15, 0, r0, c8, c7, 0		@ invalidate I + D TLBs
+
+	ldr	r0, s3c_sleep_save_phys
+	ldmia	r0, { r4 - r13 }
+
+	mcr	p15, 0, r4, c13, c0, 0	@ FCSE/PID
+	mcr	p15, 0, r5, c3, c0, 0	@ Domain ID
+	mcr	p15, 0, r6, c2, c0, 0	@ Translation Table BASE0
+	mcr	p15, 0, r7, c2, c0, 1	@ Translation Table BASE1
+	mcr	p15, 0, r8, c2, c0, 2	@ Translation Table Control
+
+	ldr	r2, =resume_with_mmu
+	mcr	p15, 0, r9, c1, c0, 0		/* turn mmu back on */
+	nop
+	mov	pc, r2				/* jump back */
+
+	.end