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authorColin Cross <ccross@android.com>2011-02-10 02:04:45 -0800
committerSantosh Shilimkar <santosh.shilimkar@ti.com>2011-09-23 12:05:29 +0530
commitab10023e0088d5075354afc7cb9e72304757dddd (patch)
tree5e8424c9818056335baeefcddab18b0600417053 /kernel/power
parentb6fd41e29dea9c6753b1843a77e50433e6123bcb (diff)
downloadlinux-ab10023e0088d5075354afc7cb9e72304757dddd.tar.bz2
cpu_pm: Add cpu power management notifiers
During some CPU power modes entered during idle, hotplug and suspend, peripherals located in the CPU power domain, such as the GIC, localtimers, and VFP, may be powered down. Add a notifier chain that allows drivers for those peripherals to be notified before and after they may be reset. Notified drivers can include VFP co-processor, interrupt controller and it's PM extensions, local CPU timers context save/restore which shouldn't be interrupted. Hence CPU PM event APIs must be called with interrupts disabled. Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Tested-and-Acked-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Kevin Hilman <khilman@ti.com> Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 3744c594b19b..80a85971cf64 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -235,3 +235,7 @@ config PM_GENERIC_DOMAINS
config PM_GENERIC_DOMAINS_RUNTIME
def_bool y
depends on PM_RUNTIME && PM_GENERIC_DOMAINS
+
+config CPU_PM
+ bool
+ depends on SUSPEND || CPU_IDLE