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| author | Abhilash Kesavan | 2014-07-04 22:50:58 +0200 |
|---|---|---|
| committer | Kukjin Kim | 2014-07-23 01:20:21 +0200 |
| commit | 20fe6f98fae6968b9d6067d49d9ecae9d9593b37 (patch) | |
| tree | 3e2a7d303e99f7b0a7fd5442cf6d569803650a9a /arch/arm/mach-exynos/regs-pmu.h | |
| parent | Merge branch 'v3.17-next/cpuidle-exynos' into v3.17-next/power-exynos (diff) | |
| download | kernel-qcow2-linux-20fe6f98fae6968b9d6067d49d9ecae9d9593b37.tar.gz kernel-qcow2-linux-20fe6f98fae6968b9d6067d49d9ecae9d9593b37.tar.xz kernel-qcow2-linux-20fe6f98fae6968b9d6067d49d9ecae9d9593b37.zip | |
ARM: EXYNOS: Support cluster power off on exynos5420/5800
Turning off a cluster when all 4 cores of the cluster are powered off
saves power significantly. Powering off the A15 L2 alone gives around
100mW in savings. Add support for powering off the A15/A7 clusters on
exynos5420/5800.
The patch enables specific register bits which ensure that:
- cluster L2 will be turned on before the first man is powered up.
- last man will be turned off before the cluster L2 is turned off.
- core is powered down before powering it up.
Remove the exynos_cluster_power_control function completely as we can
rely on the above mentioned bits rather than polling the cluster power
status register.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h index c45a2dc53e84..e5e298c0fd01 100644 --- a/arch/arm/mach-exynos/regs-pmu.h +++ b/arch/arm/mach-exynos/regs-pmu.h @@ -116,6 +116,8 @@ (EXYNOS_ARM_COMMON_CONFIGURATION + (0x80 * (_nr))) #define EXYNOS_COMMON_STATUS(_nr) \ (EXYNOS_COMMON_CONFIGURATION(_nr) + 0x4) +#define EXYNOS_COMMON_OPTION(_nr) \ + (EXYNOS_COMMON_CONFIGURATION(_nr) + 0x8) #define S5P_PAD_RET_MAUDIO_OPTION S5P_PMUREG(0x3028) #define S5P_PAD_RET_GPIO_OPTION S5P_PMUREG(0x3108) |