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| author | Krzysztof Kozlowski | 2014-09-13 19:49:32 +0200 |
|---|---|---|
| committer | Kukjin Kim | 2014-10-20 17:06:22 +0200 |
| commit | 13cfa6c4f7facfc690ba9e99ec382c151fddaced (patch) | |
| tree | 62ca869133b937a458d1c24634c0e75a308f2212 /arch/arm/mach-exynos/regs-pmu.h | |
| parent | ARM: EXYNOS: Remove unneeded __ref annotation for cpu_die function (diff) | |
| download | kernel-qcow2-linux-13cfa6c4f7facfc690ba9e99ec382c151fddaced.tar.gz kernel-qcow2-linux-13cfa6c4f7facfc690ba9e99ec382c151fddaced.tar.xz kernel-qcow2-linux-13cfa6c4f7facfc690ba9e99ec382c151fddaced.zip | |
ARM: EXYNOS: Fix CPU idle clock down after CPU off
On Exynos4 USE_DELAYED_RESET_ASSERTION must be set in
ARM_COREx_OPTION register during CPU power down. This is the proper way
of powering down CPU on Exynos4.
Additionally on Exynos4212 without this the CPU clock down feature won't
work after powering down some CPU and the online CPUs will work at full
frequency chosen by CPUfreq governor.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-exynos/regs-pmu.h')
| -rw-r--r-- | arch/arm/mach-exynos/regs-pmu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h index 96a1569262b5..4e9b4440e2bd 100644 --- a/arch/arm/mach-exynos/regs-pmu.h +++ b/arch/arm/mach-exynos/regs-pmu.h @@ -20,6 +20,7 @@ #define S5P_USE_STANDBY_WFI0 (1 << 16) #define S5P_USE_STANDBY_WFE0 (1 << 24) +#define S5P_USE_DELAYED_RESET_ASSERTION BIT(12) #define EXYNOS_SWRESET 0x0400 #define EXYNOS5440_SWRESET 0x00C4 @@ -106,6 +107,8 @@ (EXYNOS_ARM_CORE0_CONFIGURATION + (0x80 * (_nr))) #define EXYNOS_ARM_CORE_STATUS(_nr) \ (EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x4) +#define EXYNOS_ARM_CORE_OPTION(_nr) \ + (EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x8) #define EXYNOS_ARM_COMMON_CONFIGURATION 0x2500 #define EXYNOS_COMMON_CONFIGURATION(_nr) \ |