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authorColin Cross <ccross@android.com>2011-07-23 01:57:09 +0400
committerSantosh Shilimkar <santosh.shilimkar@ti.com>2011-09-23 10:35:29 +0400
commit6f3eaec87b6b17bfa49cb3b5b8d07fa84be18512 (patch)
treeafbb36f2d94758a6b2e00cb8937e0fba7de755a7
parentab10023e0088d5075354afc7cb9e72304757dddd (diff)
downloadlinux-6f3eaec87b6b17bfa49cb3b5b8d07fa84be18512.tar.xz
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.c33
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