[PATCH 05/11] PM: Enable early suspend through /sys/power/state

["Arve Hjønnevåg" <arve@android.com>]

If EARLYSUSPEND is enabled then writes to /sys/power/state no longer
blocks, and the kernel will try to enter the requested state every
time no wakelocks are held. Write "on" to resume normal operation.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
---
 kernel/power/main.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/kernel/power/main.c b/kernel/power/main.c
index 2399888..f2139ca 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -388,6 +388,9 @@ static void suspend_finish(void)
 
 
 static const char * const pm_states[PM_SUSPEND_MAX] = {
+#ifdef CONFIG_EARLYSUSPEND
+	[PM_SUSPEND_ON]		= "on",
+#endif
 	[PM_SUSPEND_STANDBY]	= "standby",
 	[PM_SUSPEND_MEM]	= "mem",
 };
@@ -505,7 +508,11 @@ static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr,
 			   const char *buf, size_t n)
 {
 #ifdef CONFIG_SUSPEND
+#ifdef CONFIG_EARLYSUSPEND
+	suspend_state_t state = PM_SUSPEND_ON;
+#else
 	suspend_state_t state = PM_SUSPEND_STANDBY;
+#endif
 	const char * const *s;
 #endif
 	char *p;
@@ -527,8 +534,15 @@ static ssize_t state_store(struct kobject *kobj, struct kobj_attribute *attr,
 			break;
 	}
 	if (state < PM_SUSPEND_MAX && *s)
+#ifdef CONFIG_EARLYSUSPEND
+		if (state == PM_SUSPEND_ON || valid_state(state)) {
+			error = 0;
+			request_suspend_state(state);
+		}
+#else
 		error = enter_state(state);
 #endif
+#endif
 
  Exit:
 	return error ? error : n;
-- 
1.6.1

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