Merge branches 'debug' and 'idle' into for-armsoc

98 files changed, 326 insertions, 1409 deletions

diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index e4c96cc6ec0c..424aa458c487 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -110,6 +110,7 @@ extern void cpu_init(void);
 
 void soft_restart(unsigned long);
 extern void (*arm_pm_restart)(char str, const char *cmd);
+extern void (*arm_pm_idle)(void);
 
 #define UDBG_UNDEFINED	(1 << 0)
 #define UDBG_SYSCALL	(1 << 1)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 971d65c253a9..008e7ce766a7 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -61,8 +61,6 @@ extern void setup_mm_for_reboot(void);
 
 static volatile int hlt_counter;
 
-#include <mach/system.h>
-
 void disable_hlt(void)
 {
 	hlt_counter++;
@@ -181,13 +179,17 @@ void cpu_idle_wait(void)
 EXPORT_SYMBOL_GPL(cpu_idle_wait);
 
 /*
- * This is our default idle handler.  We need to disable
- * interrupts here to ensure we don't miss a wakeup call.
+ * This is our default idle handler.
  */
+
+void (*arm_pm_idle)(void);
+
 static void default_idle(void)
 {
-	if (!need_resched())
-		arch_idle();
+	if (arm_pm_idle)
+		arm_pm_idle();
+	else
+		cpu_do_idle();
 	local_irq_enable();
 }
 
@@ -215,6 +217,10 @@ void cpu_idle(void)
 				cpu_die();
 #endif
 
+			/*
+			 * We need to disable interrupts here
+			 * to ensure we don't miss a wakeup call.
+			 */
 			local_irq_disable();
 #ifdef CONFIG_PL310_ERRATA_769419
 			wmb();
@@ -222,19 +228,18 @@ void cpu_idle(void)
 			if (hlt_counter) {
 				local_irq_enable();
 				cpu_relax();
-			} else {
+			} else if (!need_resched()) {
 				stop_critical_timings();
 				if (cpuidle_idle_call())
 					pm_idle();
 				start_critical_timings();
 				/*
-				 * This will eventually be removed - pm_idle
-				 * functions should always return with IRQs
-				 * enabled.
+				 * pm_idle functions must always
+				 * return with IRQs enabled.
 				 */
 				WARN_ON(irqs_disabled());
+			} else
 				local_irq_enable();
-			}
 		}
 		leds_event(led_idle_end);
 		rcu_idle_exit();
diff --git a/arch/arm/mach-at91/at91cap9.c b/arch/arm/mach-at91/at91cap9.c
index edb879ac04c8..1d29a6cbbae2 100644
--- a/arch/arm/mach-at91/at91cap9.c
+++ b/arch/arm/mach-at91/at91cap9.c
@@ -14,6 +14,7 @@
 
 #include <linux/module.h>
 
+#include <asm/proc-fns.h>
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -314,6 +315,12 @@ static struct at91_gpio_bank at91cap9_gpio[] __initdata = {
 	}
 };
 
+static void at91cap9_idle(void)
+{
+	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+	cpu_do_idle();
+}
+
 static void at91cap9_restart(char mode, const char *cmd)
 {
 	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
@@ -337,6 +344,7 @@ static void __init at91cap9_ioremap_registers(void)
 
 static void __init at91cap9_initialize(void)
 {
+	arm_pm_idle = at91cap9_idle;
 	arm_pm_restart = at91cap9_restart;
 	at91_extern_irq = (1 << AT91CAP9_ID_IRQ0) | (1 << AT91CAP9_ID_IRQ1);
 
diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
index 99c3174e24a2..dd6e2de13420 100644
--- a/arch/arm/mach-at91/at91rm9200.c
+++ b/arch/arm/mach-at91/at91rm9200.c
@@ -289,6 +289,15 @@ static struct at91_gpio_bank at91rm9200_gpio[] __initdata = {
 	}
 };
 
+static void at91rm9200_idle(void)
+{
+	/*
+	 * Disable the processor clock.  The processor will be automatically
+	 * re-enabled by an interrupt or by a reset.
+	 */
+	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+}
+
 static void at91rm9200_restart(char mode, const char *cmd)
 {
 	/*
@@ -314,6 +323,7 @@ static void __init at91rm9200_ioremap_registers(void)
 
 static void __init at91rm9200_initialize(void)
 {
+	arm_pm_idle = at91rm9200_idle;
 	arm_pm_restart = at91rm9200_restart;
 	at91_extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
 			| (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
diff --git a/arch/arm/mach-at91/at91sam9260.c b/arch/arm/mach-at91/at91sam9260.c
index 5e46e4a96430..cfe6dd747cc5 100644
--- a/arch/arm/mach-at91/at91sam9260.c
+++ b/arch/arm/mach-at91/at91sam9260.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 
+#include <asm/proc-fns.h>
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -327,8 +328,15 @@ static void __init at91sam9260_ioremap_registers(void)
 	at91sam9_ioremap_smc(0, AT91SAM9260_BASE_SMC);
 }
 
+static void at91sam9260_idle(void)
+{
+	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+	cpu_do_idle();
+}
+
 static void __init at91sam9260_initialize(void)
 {
+	arm_pm_idle = at91sam9260_idle;
 	arm_pm_restart = at91sam9_alt_restart;
 	at91_extern_irq = (1 << AT91SAM9260_ID_IRQ0) | (1 << AT91SAM9260_ID_IRQ1)
 			| (1 << AT91SAM9260_ID_IRQ2);
diff --git a/arch/arm/mach-at91/at91sam9261.c b/arch/arm/mach-at91/at91sam9261.c
index b85b9ea60170..76ffbe67fffa 100644
--- a/arch/arm/mach-at91/at91sam9261.c
+++ b/arch/arm/mach-at91/at91sam9261.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 
+#include <asm/proc-fns.h>
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -285,8 +286,15 @@ static void __init at91sam9261_ioremap_registers(void)
 	at91sam9_ioremap_smc(0, AT91SAM9261_BASE_SMC);
 }
 
+static void at91sam9261_idle(void)
+{
+	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+	cpu_do_idle();
+}
+
 static void __init at91sam9261_initialize(void)
 {
+	arm_pm_idle = at91sam9261_idle;
 	arm_pm_restart = at91sam9_alt_restart;
 	at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
 			| (1 << AT91SAM9261_ID_IRQ2);
diff --git a/arch/arm/mach-at91/at91sam9263.c b/arch/arm/mach-at91/at91sam9263.c
index 79e3669b1117..bcce7e2ca2f5 100644
--- a/arch/arm/mach-at91/at91sam9263.c
+++ b/arch/arm/mach-at91/at91sam9263.c
@@ -12,6 +12,7 @@
 
 #include <linux/module.h>
 
+#include <asm/proc-fns.h>
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -306,8 +307,15 @@ static void __init at91sam9263_ioremap_registers(void)
 	at91sam9_ioremap_smc(1, AT91SAM9263_BASE_SMC1);
 }
 
+static void at91sam9263_idle(void)
+{
+	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+	cpu_do_idle();
+}
+
 static void __init at91sam9263_initialize(void)
 {
+	arm_pm_idle = at91sam9263_idle;
 	arm_pm_restart = at91sam9_alt_restart;
 	at91_extern_irq = (1 << AT91SAM9263_ID_IRQ0) | (1 << AT91SAM9263_ID_IRQ1);
 
diff --git a/arch/arm/mach-at91/at91sam9g45.c b/arch/arm/mach-at91/at91sam9g45.c
index 7032dd32cdf0..0e80b395214d 100644
--- a/arch/arm/mach-at91/at91sam9g45.c
+++ b/arch/arm/mach-at91/at91sam9g45.c
@@ -318,6 +318,12 @@ static struct at91_gpio_bank at91sam9g45_gpio[] __initdata = {
 	}
 };
 
+static void at91sam9g45_idle(void)
+{
+	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_PCK);
+	cpu_do_idle();
+}
+
 static void at91sam9g45_restart(char mode, const char *cmd)
 {
 	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
@@ -342,6 +348,7 @@ static void __init at91sam9g45_ioremap_registers(void)
 
 static void __init at91sam9g45_initialize(void)
 {
+	arm_pm_idle = at91sam9g45_idle;
 	arm_pm_restart = at91sam9g45_restart;
 	at91_extern_irq = (1 << AT91SAM9G45_ID_IRQ0);
 
diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c
index d6bcb1da11df..e00939420405 100644
--- a/arch/arm/mach-at91/at91sam9rl.c
+++ b/arch/arm/mach-at91/at91sam9rl.c
@@ -11,6 +11,7 @@
 
 #include <linux/module.h>
 
+#include <asm/proc-fns.h>
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <