[PATCH] LED: add LED class

Add the foundations of a new LEDs subsystem.  This patch adds a class which
presents LED devices within sysfs and allows their brightness to be
controlled.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h
new file mode 100644
index 000000000000..d26ca2f7e722
--- /dev/null
+++ b/drivers/leds/leds.h
@@ -0,0 +1,31 @@
+/*
+ * LED Core
+ *
+ * Copyright 2005 Openedhand Ltd.
+ *
+ * Author: Richard Purdie <rpurdie@openedhand.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef __LEDS_H_INCLUDED
+#define __LEDS_H_INCLUDED
+
+#include <linux/leds.h>
+
+static inline void led_set_brightness(struct led_classdev *led_cdev,
+                                        enum led_brightness value)
+{
+        if (value > LED_FULL)
+                value = LED_FULL;
+        led_cdev->brightness = value;
+        if (!(led_cdev->flags & LED_SUSPENDED))
+                led_cdev->brightness_set(led_cdev, value);
+}
+
+extern rwlock_t leds_list_lock;
+extern struct list_head leds_list;
+
+#endif  /* __LEDS_H_INCLUDED */