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Subject[PATCH v2 2/5] cpu_pm: call notifiers during suspend
Date
From: Colin Cross <ccross@android.com>

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>
[santosh.shilimkar@ti.com: Rebased against 3.1-rc4]
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
---
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 54aa892..3d115d0 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);
@@ -113,3 +114,35 @@ 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
--
1.7.4.1


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