11 files changed, 93 insertions, 12 deletions

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 4e1dd8d1eda8..454bc6ed9a8d 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -615,6 +615,8 @@ void __init exynos5_init_irq(void)
          * uses GIC instead of VIC.
          */
         s5p_init_irq(NULL, 0);
+
+        gic_arch_extn.irq_set_wake = s3c_irq_wake;
 }
 
 struct bus_type exynos_subsys = {
diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c
index cff0595d0d35..8e4ec21ef2cf 100644
--- a/arch/arm/mach-exynos/cpuidle.c
+++ b/arch/arm/mach-exynos/cpuidle.c
@@ -116,7 +116,8 @@ static int exynos4_enter_core0_aftr(struct cpuidle_device *dev,
         cpu_suspend(0, idle_finisher);
 
 #ifdef CONFIG_SMP
-        scu_enable(S5P_VA_SCU);
+        if (!soc_is_exynos5250())
+                scu_enable(S5P_VA_SCU);
 #endif
         cpu_pm_exit();
 
diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
index f4d7dd20cdac..c3f825b27947 100644
--- a/arch/arm/mach-exynos/hotplug.c
+++ b/arch/arm/mach-exynos/hotplug.c
@@ -20,10 +20,11 @@
 #include <asm/smp_plat.h>
 
 #include <mach/regs-pmu.h>
+#include <plat/cpu.h>
 
 #include "common.h"
 
-static inline void cpu_enter_lowpower(void)
+static inline void cpu_enter_lowpower_a9(void)
 {
         unsigned int v;
 
@@ -45,6 +46,35 @@ static inline void cpu_enter_lowpower(void)
           : "cc");
 }
 
+static inline void cpu_enter_lowpower_a15(void)
+{
+        unsigned int v;
+
+        asm volatile(
+        "       mrc     p15, 0, %0, c1, c0, 0\n"
+        "       bic     %0, %0, %1\n"
+        "       mcr     p15, 0, %0, c1, c0, 0\n"
+          : "=&r" (v)
+          : "Ir" (CR_C)
+          : "cc");
+
+        flush_cache_louis();
+
+        asm volatile(
+        /*
+        * Turn off coherency
+        */
+        "       mrc     p15, 0, %0, c1, c0, 1\n"
+        "       bic     %0, %0, %1\n"
+        "       mcr     p15, 0, %0, c1, c0, 1\n"
+        : "=&r" (v)
+        : "Ir" (0x40)
+        : "cc");
+
+        isb();
+        dsb();
+}
+
 static inline void cpu_leave_lowpower(void)
 {
         unsigned int v;
@@ -103,11 +133,20 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
 void __ref exynos_cpu_die(unsigned int cpu)
 {
         int spurious = 0;
+        int primary_part = 0;
 
         /*
-         * we're ready for shutdown now, so do it
+         * we're ready for shutdown now, so do it.
+         * Exynos4 is A9 based while Exynos5 is A15; check the CPU part
+         * number by reading the Main ID register and then perform the
+         * appropriate sequence for entering low power.
          */
-        cpu_enter_lowpower();
+        asm("mrc p15, 0, %0, c0, c0, 0" : "=r"(primary_part) : : "cc");
+        if ((primary_part & 0xfff0) == 0xc0f0)
+                cpu_enter_lowpower_a15();
+        else
+                cpu_enter_lowpower_a9();
+
         platform_do_lowpower(cpu, &spurious);
 
         /*
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index c06c992943a1..8df6ec547f78 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -81,6 +81,9 @@ static int exynos_cpu_suspend(unsigned long arg)
         outer_flush_all();
 #endif
 
+        if (soc_is_exynos5250())
+                flush_cache_all();
+
         /* issue the standby signal into the pm unit. */
         cpu_do_idle();
 
@@ -312,6 +315,10 @@ static void exynos_pm_resume(void)
         }
 
 early_wakeup:
+
+        /* Clear SLEEP mode set in INFORM1 */
+        __raw_writel(0x0, S5P_INFORM1);
+
         return;
 }
 
diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 219fb075741b..ce1661d18e56 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -21,6 +21,7 @@
 #include <linux/io.h>
 #include <linux/platform_data/gpio-omap.h>
 #include <linux/power/smartreflex.h>
+#include <linux/platform_data/omap_ocp2scp.h>
 #include <linux/i2c-omap.h>
 
 #include <linux/omap-dma.h>
diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c
index 4d76a3ca5bf3..e237602e10ea 100644
--- a/arch/arm/mach-omap2/omap_phy_internal.c
+++ b/arch/arm/mach-omap2/omap_phy_internal.c
@@ -33,6 +33,38 @@
 #include "control.h"
 #include "usb.h"
 
+#define CONTROL_DEV_CONF                0x300
+#define PHY_PD                          0x1
+
+/**
+ * omap4430_phy_power_down: disable MUSB PHY during early init
+ *
+ * OMAP4 MUSB PHY module is enabled by default on reset, but this will
+ * prevent core retention if not disabled by SW. USB driver will
+ * later on enable this, once and if the driver needs it.
+ */
+static int __init omap4430_phy_power_down(void)
+{
+        void __iomem *ctrl_base;
+
+        if (!cpu_is_omap44xx())
+                return 0;
+
+        ctrl_base = ioremap(OMAP443X_SCM_BASE, SZ_1K);
+        if (!ctrl_base) {
+                pr_err("control module ioremap failed\n");
+                return -ENOMEM;
+        }
+
+        /* Power down the phy */
+        __raw_writel(PHY_PD, ctrl_base + CONTROL_DEV_CONF);
+
+        iounmap(ctrl_base);
+
+        return 0;
+}
+early_initcall(omap4430_phy_power_down);
+
 void am35x_musb_reset(void)
 {
         u32     regval;
diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
index e5a4c3a0accd..f4b3143a8b1d 100644
--- a/arch/arm/mach-omap2/pm.c
+++ b/arch/arm/mach-omap2/pm.c
@@ -40,6 +40,7 @@ static struct omap_device_pm_latency *pm_lats;
  */
 int (*omap_pm_suspend)(void);
 
+#ifdef CONFIG_PM
 /**
  * struct omap2_oscillator - Describe the board main oscillator latencies
  * @startup_time: oscillator startup latency
@@ -69,6 +70,7 @@ void omap_pm_get_oscillator(u32 *tstart, u32 *tshut)
         *tstart = oscillator.startup_time;
         *tshut = oscillator.shutdown_time;
 }
+#endif
 
 static int __init _init_omap_device(char *name)
 {
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 4db7b238a0d5..02c291c8e470 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -135,7 +135,7 @@ extern void omap_pm_get_oscillator(u32 *tstart, u32 *tshut);
 extern void omap_pm_setup_sr_i2c_pcb_length(u32 mm);
 #else
 static inline void omap_pm_setup_oscillator(u32 tstart, u32 tshut) { }
-static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { }
+static inline void omap_pm_get_oscillator(u32 *tstart, u32 *tshut) { *tstart = *tshut = 0; }
 static inline void omap_pm_setup_sr_i2c_pcb_length(u32 mm) { }
 #endif
 
diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index 7da75aed1514..aa6fd98f606e 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -101,13 +101,6 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
         if (!strncmp(pwrdm->name, "cpu", 3))
                 return 0;
 
-        /*
-         * FIXME: Remove this check when core retention is supported
-         * Only MPUSS power domain is added in the list.
-         */
-        if (strcmp(pwrdm->name, "mpu_pwrdm"))
-                return 0;
-
         pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC);
         if (!pwrst)
                 return -ENOMEM;
diff --git a/arch/arm/mach-omap2/vc.c b/arch/arm/mach-omap2/vc.c
index 71396c3aa35f..49ac7977e03e 100644
--- a/arch/arm/mach-omap2/vc.c
+++ b/arch/arm/mach-omap2/vc.c
@@ -666,6 +666,7 @@ static u8 omap_vc_calc_vsel(struct voltagedomain *voltdm, u32 uvolt)
         return voltdm->pmic->uv_to_vsel(uvolt);
 }
 
+#ifdef CONFIG_PM
 /**
  * omap_pm_setup_sr_i2c_pcb_length - set length of SR I2C traces on PCB
  * @mm: length of the PCB trace in millimetres
@@ -678,6 +679,7 @@ void __init omap_pm_setup_sr_i2c_pcb_length(u32 mm)
 {
         sr_i2c_pcb_length = mm;
 }
+#endif
 
 void __init omap_vc_init_channel(struct voltagedomain *voltdm)
 {
diff --git a/arch/arm/plat-samsung/include/plat/pm.h b/arch/arm/plat-samsung/include/plat/pm.h
index 61fc53740fbd..887a0c954379 100644
--- a/arch/arm/plat-samsung/include/plat/pm.h
+++ b/arch/arm/plat-samsung/include/plat/pm.h
@@ -107,10 +107,12 @@ 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
+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 int s3c24xx_irq_suspend(void);
 extern void s3c24xx_irq_resume(void);
 #else
+#define s3c_irq_wake NULL
 #define s3c_irqext_wake NULL
 #define s3c24xx_irq_suspend NULL
 #define s3c24xx_irq_resume  NULL