PM: Implement wakelock api.

PM: wakelock: Replace expire work with a timer

The expire work function did not work in the normal case.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 87f4d24..1c04e80 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -18,6 +18,25 @@
 
 	  Turning OFF this setting is NOT recommended! If in doubt, say Y.
 
+config HAS_WAKELOCK
+	bool
+
+config WAKELOCK
+	bool "Wake lock"
+	depends on PM && RTC_CLASS
+	default n
+	select HAS_WAKELOCK
+	---help---
+	  Enable wakelocks. When user space request a sleep state the
+	  sleep request will be delayed until no wake locks are held.
+
+config WAKELOCK_STAT
+	bool "Wake lock stats"
+	depends on WAKELOCK
+	default y
+	---help---
+	  Report wake lock stats in /proc/wakelocks
+
 config HIBERNATE_CALLBACKS
 	bool