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| author | Colin Cross <ccross@android.com> | 2011-07-22 14:57:09 -0700 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2011-09-23 12:05:29 +0530 |
| commit | 6f3eaec87b6b17bfa49cb3b5b8d07fa84be18512 (patch) | |
| tree | afbb36f2d94758a6b2e00cb8937e0fba7de755a7 | |
| parent | ab10023e0088d5075354afc7cb9e72304757dddd (diff) | |
| download | lwn-6f3eaec87b6b17bfa49cb3b5b8d07fa84be18512.tar.gz lwn-6f3eaec87b6b17bfa49cb3b5b8d07fa84be18512.zip | |
cpu_pm: call notifiers during suspend
Implements syscore_ops in cpu_pm to call the cpu and
cpu cluster notifiers during suspend and resume,
allowing drivers receiving the notifications to
avoid implementing syscore_ops.
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: Vishwanath BS <vishwanath.bs@ti.com>
| -rw-r--r-- | kernel/cpu_pm.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/cpu_pm.c b/kernel/cpu_pm.c index 4d1ff4acd04b..249152e15308 100644 --- a/kernel/cpu_pm.c +++ b/kernel/cpu_pm.c @@ -20,6 +20,7 @@ #include <linux/module.h> #include <linux/notifier.h> #include <linux/spinlock.h> +#include <linux/syscore_ops.h> static DEFINE_RWLOCK(cpu_pm_notifier_lock); static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain); @@ -198,3 +199,35 @@ int cpu_cluster_pm_exit(void) return ret; } EXPORT_SYMBOL_GPL(cpu_cluster_pm_exit); + +#ifdef CONFIG_PM +static int cpu_pm_suspend(void) +{ + int ret; + + ret = cpu_pm_enter(); + if (ret) + return ret; + + ret = cpu_cluster_pm_enter(); + return ret; +} + +static void cpu_pm_resume(void) +{ + cpu_cluster_pm_exit(); + cpu_pm_exit(); +} + +static struct syscore_ops cpu_pm_syscore_ops = { + .suspend = cpu_pm_suspend, + .resume = cpu_pm_resume, +}; + +static int cpu_pm_init(void) +{ + register_syscore_ops(&cpu_pm_syscore_ops); + return 0; +} +core_initcall(cpu_pm_init); +#endif |