1 files changed, 110 insertions, 0 deletions

diff --git a/include/linux/leds.h b/include/linux/leds.h
new file mode 100644
index 000000000000..dc23c7c639f3
--- /dev/null
+++ b/include/linux/leds.h
@@ -0,0 +1,110 @@
+/*
+ * 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)
+
+        /* Set LED brightness level */
+        void            (*brightness_set)(struct led_classdev *led_cdev,
+                                          enum led_brightness brightness);
+
+        struct class_device     *class_dev;
+        struct list_head         node;                  /* LED Device list */
+        char                    *default_trigger;       /* Trigger to use */
+
+#ifdef CONFIG_LEDS_TRIGGERS
+        /* Protects the trigger data below */
+        rwlock_t                 trigger_lock;
+
+        struct led_trigger      *trigger;
+        struct list_head         trig_list;
+        void                    *trigger_data;
+#endif
+};
+
+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);
+
+/*
+ * LED Triggers
+ */
+#ifdef CONFIG_LEDS_TRIGGERS
+
+#define TRIG_NAME_MAX 50
+
+struct led_trigger {
+        /* Trigger Properties */
+        const char       *name;
+        void            (*activate)(struct led_classdev *led_cdev);
+        void            (*deactivate)(struct led_classdev *led_cdev);
+
+        /* LEDs under control by this trigger (for simple triggers) */
+        rwlock_t          leddev_list_lock;
+        struct list_head  led_cdevs;
+
+        /* Link to next registered trigger */
+        struct list_head  next_trig;
+};
+
+/* Registration functions for complex triggers */
+extern int led_trigger_register(struct led_trigger *trigger);
+extern void led_trigger_unregister(struct led_trigger *trigger);
+
+/* Registration functions for simple triggers */
+#define DEFINE_LED_TRIGGER(x)           static struct led_trigger *x;
+#define DEFINE_LED_TRIGGER_GLOBAL(x)    struct led_trigger *x;
+extern void led_trigger_register_simple(const char *name,
+                                struct led_trigger **trigger);
+extern void led_trigger_unregister_simple(struct led_trigger *trigger);
+extern void led_trigger_event(struct led_trigger *trigger,
+                                enum led_brightness event);
+
+#else
+
+/* Triggers aren't active - null macros */
+#define DEFINE_LED_TRIGGER(x)
+#define DEFINE_LED_TRIGGER_GLOBAL(x)
+#define led_trigger_register_simple(x, y) do {} while(0)
+#define led_trigger_unregister_simple(x) do {} while(0)
+#define led_trigger_event(x, y) do {} while(0)
+
+#endif
+
+/* Trigger specific functions */
+#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
+extern void ledtrig_ide_activity(void);
+#else
+#define ledtrig_ide_activity() do {} while(0)
+#endif
+
+#endif          /* __LINUX_LEDS_H_INCLUDED */