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authorAbhilash Kesavan <a.kesavan@samsung.com>2014-07-05 05:50:58 +0900
committerKukjin Kim <kgene.kim@samsung.com>2014-07-23 08:20:21 +0900
commit20fe6f98fae6968b9d6067d49d9ecae9d9593b37 (patch)
tree3e2a7d303e99f7b0a7fd5442cf6d569803650a9a /arch/arm/mach-omap2/twl-common.c
parent5f534d10d223636b3cd214376471fcfef71baea2 (diff)
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-omap2/twl-common.c')
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