[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>
diff --git a/include/linux/leds.h b/include/linux/leds.h
new file mode 100644
index 0000000..6812640
--- /dev/null
+++ b/include/linux/leds.h
@@ -0,0 +1,51 @@
+/*
+ * Driver model for leds and led triggers
+ *
+ * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
+ * Copyright (C) 2005 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 __LINUX_LEDS_H_INCLUDED
+#define __LINUX_LEDS_H_INCLUDED
+
+struct device;
+struct class_device;
+/*
+ * LED Core
+ */
+
+enum led_brightness {
+ LED_OFF = 0,
+ LED_HALF = 127,
+ LED_FULL = 255,
+};
+
+struct led_classdev {
+ const char *name;
+ int brightness;
+ int flags;
+#define LED_SUSPENDED (1 << 0)
+
+ /* A function to set the brightness of the led */
+ void (*brightness_set)(struct led_classdev *led_cdev,
+ enum led_brightness brightness);
+
+ struct class_device *class_dev;
+ /* LED Device linked list */
+ struct list_head node;
+
+ /* Trigger data */
+ char *default_trigger;
+};
+
+extern int led_classdev_register(struct device *parent,
+ struct led_classdev *led_cdev);
+extern void led_classdev_unregister(struct led_classdev *led_cdev);
+extern void led_classdev_suspend(struct led_classdev *led_cdev);
+extern void led_classdev_resume(struct led_classdev *led_cdev);
+
+#endif /* __LINUX_LEDS_H_INCLUDED */