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| 1 | /* |
| 2 | * LED Core |
| 3 | * |
| 4 | * Copyright 2005 Openedhand Ltd. |
| 5 | * |
| 6 | * Author: Richard Purdie <rpurdie@openedhand.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | */ |
| 13 | #ifndef __LEDS_H_INCLUDED |
| 14 | #define __LEDS_H_INCLUDED |
| 15 | |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/rwsem.h> |
| 18 | #include <linux/leds.h> |
| 19 | |
| 20 | static inline void __led_set_brightness(struct led_classdev *led_cdev, |
| 21 | enum led_brightness value) |
| 22 | { |
| 23 | if (value > led_cdev->max_brightness) |
| 24 | value = led_cdev->max_brightness; |
| 25 | led_cdev->brightness = value; |
| 26 | if (!(led_cdev->flags & LED_SUSPENDED)) |
| 27 | led_cdev->brightness_set(led_cdev, value); |
| 28 | } |
| 29 | |
| 30 | static inline int led_get_brightness(struct led_classdev *led_cdev) |
| 31 | { |
| 32 | return led_cdev->brightness; |
| 33 | } |
| 34 | |
| 35 | extern struct rw_semaphore leds_list_lock; |
| 36 | extern struct list_head leds_list; |
| 37 | |
| 38 | #ifdef CONFIG_LEDS_TRIGGERS |
| 39 | void led_trigger_set_default(struct led_classdev *led_cdev); |
| 40 | void led_trigger_set(struct led_classdev *led_cdev, |
| 41 | struct led_trigger *trigger); |
| 42 | void led_trigger_remove(struct led_classdev *led_cdev); |
| 43 | |
| 44 | static inline void *led_get_trigger_data(struct led_classdev *led_cdev) |
| 45 | { |
| 46 | return led_cdev->trigger_data; |
| 47 | } |
| 48 | |
| 49 | #else |
| 50 | #define led_trigger_set_default(x) do {} while (0) |
| 51 | #define led_trigger_set(x, y) do {} while (0) |
| 52 | #define led_trigger_remove(x) do {} while (0) |
| 53 | #define led_get_trigger_data(x) (NULL) |
| 54 | #endif |
| 55 | |
| 56 | ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, |
| 57 | const char *buf, size_t count); |
| 58 | ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, |
| 59 | char *buf); |
| 60 | |
| 61 | #endif /* __LEDS_H_INCLUDED */ |
| 62 |
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Tags:
od-2011-09-04
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v2.6.34-rc5
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