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- /*
- * 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
- #include <linux/list.h>
- #include <linux/spinlock.h>
- 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 */
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