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/main.c b/kernel/power/main.c
index dad38e2..ff29679 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -308,6 +308,11 @@
#endif /* CONFIG_PM_TRACE */
+#ifdef CONFIG_USER_WAKELOCK
+power_attr(wake_lock);
+power_attr(wake_unlock);
+#endif
+
static struct attribute * g[] = {
&state_attr.attr,
#ifdef CONFIG_PM_TRACE
@@ -320,6 +325,10 @@
#ifdef CONFIG_PM_DEBUG
&pm_test_attr.attr,
#endif
+#ifdef CONFIG_USER_WAKELOCK
+ &wake_lock_attr.attr,
+ &wake_unlock_attr.attr,
+#endif
#endif
NULL,
};