PM: Add user-space wake lock api.
This adds /sys/power/wake_lock and /sys/power/wake_unlock.
Writing a string to wake_lock creates a wake lock the
first time is sees a string and locks it. Optionally, the
string can be followed by a timeout.
To unlock the wake lock, write the same string to wake_unlock.
Change-Id: I66c6e3fe6487d17f9c2fafde1174042e57d15cd7
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 41bd5bd..b0a195b 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -40,6 +40,16 @@
---help---
Report wake lock stats in /proc/wakelocks
+config USER_WAKELOCK
+ bool "Userspace wake locks"
+ depends on WAKELOCK
+ default y
+ ---help---
+ User-space wake lock api. Write "lockname" or "lockname timeout"
+ to /sys/power/wake_lock lock and if needed create a wake lock.
+ Write "lockname" to /sys/power/wake_unlock to unlock a user wake
+ lock.
+
config EARLYSUSPEND
bool "Early suspend"
depends on WAKELOCK