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authorLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 10:58:20 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-13 10:58:20 -0800
commita11da7df6543b5f71a150b47c0d08ecf0799a0f3 (patch)
tree77eaac99426f64a0a8dc3b5d62c86138a8c72d43 /arch/arm/mach-exynos
parentb8edf848e9119bab9d999b9ca80d8520641810f2 (diff)
parent9c7466b217af784280d9fc841bbd559ef3bf33e9 (diff)
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Merge tag 'pm-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC power management and clock changes from Olof Johansson: "This branch contains a largeish set of updates of power management and clock setup. The bulk of it is for OMAP/AM33xx platforms, but also a few around hotplug/suspend/resume on Exynos. It includes a split-up of some of the OMAP clock data into separate files which adds to the diffstat, but gross delta is fairly reasonable." * tag 'pm-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits) ARM: OMAP: Move plat-omap/dma-omap.h to include/linux/omap-dma.h ASoC: OMAP: mcbsp fixes for enabling ARM multiplatform support watchdog: OMAP: fixup for ARM multiplatform support ARM: EXYNOS: Add flush_cache_all in suspend finisher ARM: EXYNOS: Remove scu_enable from cpuidle ARM: EXYNOS: Fix soft reboot hang after suspend/resume ARM: EXYNOS: Add support for rtc wakeup ARM: EXYNOS: fix the hotplug for Cortex-A15 ARM: OMAP2+: omap_device: Correct resource handling for DT boot ARM: OMAP2+: hwmod: Add possibility to count hwmod resources based on type ARM: OMAP2+: hwmod: Add support for per hwmod/module context lost count ARM: OMAP2+: PRM: initialize some PRM functions early ARM: OMAP2+: voltage: fixup oscillator handling when CONFIG_PM=n ARM: OMAP4: USB: power down MUSB PHY during boot ARM: OMAP2+: clock: Cleanup !CONFIG_COMMON_CLK parts ARM: OMAP2xxx: clock: drop obsolete clock data ARM: OMAP2: clock: Cleanup !CONFIG_COMMON_CLK parts ARM: OMAP3+: DPLL: drop !CONFIG_COMMON_CLK sections ARM: AM33xx: clock: drop obsolete clock data ARM: OMAP3xxx: clk: drop obsolete clock data ...
Diffstat (limited to 'arch/arm/mach-exynos')
-rw-r--r--arch/arm/mach-exynos/common.c2
-rw-r--r--arch/arm/mach-exynos/cpuidle.c3
-rw-r--r--arch/arm/mach-exynos/hotplug.c45
-rw-r--r--arch/arm/mach-exynos/pm.c7
4 files changed, 53 insertions, 4 deletions
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 3f257e76bfd..ddd4b72c6f9 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -680,6 +680,8 @@ 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 cff0595d0d3..8e4ec21ef2c 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 f4d7dd20cda..c3f825b2794 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 c06c992943a..8df6ec547f7 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;
}