projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| c72a1d60 RP |
1 | /* |
| 2 | * Driver model for leds and led triggers | |
| 3 | * | |
| 4 | * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu> | |
| 5 | * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com> | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License version 2 as | |
| 9 | * published by the Free Software Foundation. | |
| 10 | * | |
| 11 | */ | |
| 12 | #ifndef __LINUX_LEDS_H_INCLUDED | |
| 13 | #define __LINUX_LEDS_H_INCLUDED | |
| 14 | ||
| af410fc1 JB |
15 | #include <linux/list.h> |
| 16 | #include <linux/spinlock.h> | |
| 17 | ||
| c72a1d60 RP |
18 | struct device; |
| 19 | struct class_device; | |
| 20 | /* | |
| 21 | * LED Core | |
| 22 | */ | |
| 23 | ||
| 24 | enum led_brightness { | |
| fb5035db BD |
25 | LED_OFF = 0, |
| 26 | LED_HALF = 127, | |
| 27 | LED_FULL = 255, | |
| c72a1d60 RP |
28 | }; |
| 29 | ||
| 30 | struct led_classdev { | |
| fb5035db BD |
31 | const char *name; |
| 32 | int brightness; | |
| 33 | int flags; | |
| c72a1d60 | 34 | |
| fb5035db | 35 | #define LED_SUSPENDED (1 << 0) |
| c72a1d60 | 36 | |
| fb5035db BD |
37 | /* Set LED brightness level */ |
| 38 | void (*brightness_set)(struct led_classdev *led_cdev, | |
| 39 | enum led_brightness brightness); | |
| 40 | ||
| 41 | struct class_device *class_dev; | |
| 42 | struct list_head node; /* LED Device list */ | |
| 43 | char *default_trigger; /* Trigger to use */ | |
| c72a1d60 | 44 | |
| c3bc9956 | 45 | #ifdef CONFIG_LEDS_TRIGGERS |
| c3bc9956 | 46 | /* Protects the trigger data below */ |
| fb5035db | 47 | rwlock_t trigger_lock; |
| c3bc9956 | 48 | |
| fb5035db BD |
49 | struct led_trigger *trigger; |
| 50 | struct list_head trig_list; | |
| 51 | void *trigger_data; | |
| c3bc9956 | 52 | #endif |
| c72a1d60 RP |
53 | }; |
| 54 | ||
| 55 | extern int led_classdev_register(struct device *parent, | |
| fb5035db | 56 | struct led_classdev *led_cdev); |
| c72a1d60 RP |
57 | extern void led_classdev_unregister(struct led_classdev *led_cdev); |
| 58 | extern void led_classdev_suspend(struct led_classdev *led_cdev); | |
| 59 | extern void led_classdev_resume(struct led_classdev *led_cdev); | |
| 60 | ||
| c3bc9956 RP |
61 | /* |
| 62 | * LED Triggers | |
| 63 | */ | |
| 64 | #ifdef CONFIG_LEDS_TRIGGERS | |
| 65 | ||
| 66 | #define TRIG_NAME_MAX 50 | |
| 67 | ||
| 68 | struct led_trigger { | |
| 69 | /* Trigger Properties */ | |
| fb5035db BD |
70 | const char *name; |
| 71 | void (*activate)(struct led_classdev *led_cdev); | |
| 72 | void (*deactivate)(struct led_classdev *led_cdev); | |
| c3bc9956 RP |
73 | |
| 74 | /* LEDs under control by this trigger (for simple triggers) */ | |
| fb5035db BD |
75 | rwlock_t leddev_list_lock; |
| 76 | struct list_head led_cdevs; | |
| c3bc9956 RP |
77 | |
| 78 | /* Link to next registered trigger */ | |
| fb5035db | 79 | struct list_head next_trig; |
| c3bc9956 RP |
80 | }; |
| 81 | ||
| 82 | /* Registration functions for complex triggers */ | |
| 83 | extern int led_trigger_register(struct led_trigger *trigger); | |
| 84 | extern void led_trigger_unregister(struct led_trigger *trigger); | |
| 85 | ||
| 86 | /* Registration functions for simple triggers */ | |
| 87 | #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; | |
| 88 | #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; | |
| 89 | extern void led_trigger_register_simple(const char *name, | |
| 90 | struct led_trigger **trigger); | |
| 91 | extern void led_trigger_unregister_simple(struct led_trigger *trigger); | |
| 92 | extern void led_trigger_event(struct led_trigger *trigger, | |
| 93 | enum led_brightness event); | |
| 94 | ||
| 95 | #else | |
| 96 | ||
| 97 | /* Triggers aren't active - null macros */ | |
| 98 | #define DEFINE_LED_TRIGGER(x) | |
| 99 | #define DEFINE_LED_TRIGGER_GLOBAL(x) | |
| 100 | #define led_trigger_register_simple(x, y) do {} while(0) | |
| 101 | #define led_trigger_unregister_simple(x) do {} while(0) | |
| 102 | #define led_trigger_event(x, y) do {} while(0) | |
| 103 | ||
| 104 | #endif | |
| 2bfb646c RP |
105 | |
| 106 | /* Trigger specific functions */ | |
| 107 | #ifdef CONFIG_LEDS_TRIGGER_IDE_DISK | |
| 108 | extern void ledtrig_ide_activity(void); | |
| 109 | #else | |
| 110 | #define ledtrig_ide_activity() do {} while(0) | |
| 111 | #endif | |
| 112 | ||
| c72a1d60 | 113 | #endif /* __LINUX_LEDS_H_INCLUDED */ |