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12#ifndef __LINUX_LEDS_H_INCLUDED
13#define __LINUX_LEDS_H_INCLUDED
14
15#include <linux/device.h>
16#include <linux/list.h>
17#include <linux/mutex.h>
18#include <linux/rwsem.h>
19#include <linux/spinlock.h>
20#include <linux/timer.h>
21#include <linux/workqueue.h>
22
23struct device;
24
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26
27
28enum led_brightness {
29 LED_OFF = 0,
30 LED_HALF = 127,
31 LED_FULL = 255,
32};
33
34struct led_classdev {
35 const char *name;
36 enum led_brightness brightness;
37 enum led_brightness max_brightness;
38 int flags;
39
40
41#define LED_SUSPENDED (1 << 0)
42
43#define LED_CORE_SUSPENDRESUME (1 << 16)
44#define LED_BLINK_ONESHOT (1 << 17)
45#define LED_BLINK_ONESHOT_STOP (1 << 18)
46#define LED_BLINK_INVERT (1 << 19)
47#define LED_SYSFS_DISABLE (1 << 20)
48#define SET_BRIGHTNESS_ASYNC (1 << 21)
49#define SET_BRIGHTNESS_SYNC (1 << 22)
50#define LED_DEV_CAP_FLASH (1 << 23)
51
52
53
54 void (*brightness_set)(struct led_classdev *led_cdev,
55 enum led_brightness brightness);
56
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58
59
60 int (*brightness_set_sync)(struct led_classdev *led_cdev,
61 enum led_brightness brightness);
62
63 enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
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72
73 int (*blink_set)(struct led_classdev *led_cdev,
74 unsigned long *delay_on,
75 unsigned long *delay_off);
76
77 struct device *dev;
78 const struct attribute_group **groups;
79
80 struct list_head node;
81 const char *default_trigger;
82
83 unsigned long blink_delay_on, blink_delay_off;
84 struct timer_list blink_timer;
85 int blink_brightness;
86 void (*flash_resume)(struct led_classdev *led_cdev);
87
88 struct work_struct set_brightness_work;
89 int delayed_set_value;
90
91#ifdef CONFIG_LEDS_TRIGGERS
92
93 struct rw_semaphore trigger_lock;
94
95 struct led_trigger *trigger;
96 struct list_head trig_list;
97 void *trigger_data;
98
99 bool activated;
100#endif
101
102
103 struct mutex led_access;
104};
105
106extern int led_classdev_register(struct device *parent,
107 struct led_classdev *led_cdev);
108extern int devm_led_classdev_register(struct device *parent,
109 struct led_classdev *led_cdev);
110extern void led_classdev_unregister(struct led_classdev *led_cdev);
111extern void devm_led_classdev_unregister(struct device *parent,
112 struct led_classdev *led_cdev);
113extern void led_classdev_suspend(struct led_classdev *led_cdev);
114extern void led_classdev_resume(struct led_classdev *led_cdev);
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131extern void led_blink_set(struct led_classdev *led_cdev,
132 unsigned long *delay_on,
133 unsigned long *delay_off);
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148extern void led_blink_set_oneshot(struct led_classdev *led_cdev,
149 unsigned long *delay_on,
150 unsigned long *delay_off,
151 int invert);
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161extern void led_set_brightness(struct led_classdev *led_cdev,
162 enum led_brightness brightness);
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172extern int led_update_brightness(struct led_classdev *led_cdev);
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180extern void led_sysfs_disable(struct led_classdev *led_cdev);
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188extern void led_sysfs_enable(struct led_classdev *led_cdev);
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196static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
197{
198 return led_cdev->flags & LED_SYSFS_DISABLE;
199}
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204
205#define DEFINE_LED_TRIGGER(x) static struct led_trigger *x;
206#define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x;
207
208#ifdef CONFIG_LEDS_TRIGGERS
209
210#define TRIG_NAME_MAX 50
211
212struct led_trigger {
213
214 const char *name;
215 void (*activate)(struct led_classdev *led_cdev);
216 void (*deactivate)(struct led_classdev *led_cdev);
217
218
219 rwlock_t leddev_list_lock;
220 struct list_head led_cdevs;
221
222
223 struct list_head next_trig;
224};
225
226ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
227 const char *buf, size_t count);
228ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr,
229 char *buf);
230
231
232extern int led_trigger_register(struct led_trigger *trigger);
233extern void led_trigger_unregister(struct led_trigger *trigger);
234
235extern void led_trigger_register_simple(const char *name,
236 struct led_trigger **trigger);
237extern void led_trigger_unregister_simple(struct led_trigger *trigger);
238extern void led_trigger_event(struct led_trigger *trigger,
239 enum led_brightness event);
240extern void led_trigger_blink(struct led_trigger *trigger,
241 unsigned long *delay_on,
242 unsigned long *delay_off);
243extern void led_trigger_blink_oneshot(struct led_trigger *trigger,
244 unsigned long *delay_on,
245 unsigned long *delay_off,
246 int invert);
247extern void led_trigger_set_default(struct led_classdev *led_cdev);
248extern void led_trigger_set(struct led_classdev *led_cdev,
249 struct led_trigger *trigger);
250extern void led_trigger_remove(struct led_classdev *led_cdev);
251
252static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
253{
254 return led_cdev->trigger_data;
255}
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272extern void led_trigger_rename_static(const char *name,
273 struct led_trigger *trig);
274
275#else
276
277
278struct led_trigger {};
279
280
281static inline void led_trigger_register_simple(const char *name,
282 struct led_trigger **trigger) {}
283static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
284static inline void led_trigger_event(struct led_trigger *trigger,
285 enum led_brightness event) {}
286static inline void led_trigger_blink(struct led_trigger *trigger,
287 unsigned long *delay_on,
288 unsigned long *delay_off) {}
289static inline void led_trigger_blink_oneshot(struct led_trigger *trigger,
290 unsigned long *delay_on,
291 unsigned long *delay_off,
292 int invert) {}
293static inline void led_trigger_set_default(struct led_classdev *led_cdev) {}
294static inline void led_trigger_set(struct led_classdev *led_cdev,
295 struct led_trigger *trigger) {}
296static inline void led_trigger_remove(struct led_classdev *led_cdev) {}
297static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
298{
299 return NULL;
300}
301
302#endif
303
304
305#ifdef CONFIG_LEDS_TRIGGER_IDE_DISK
306extern void ledtrig_ide_activity(void);
307#else
308static inline void ledtrig_ide_activity(void) {}
309#endif
310
311#if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)
312extern void ledtrig_flash_ctrl(bool on);
313extern void ledtrig_torch_ctrl(bool on);
314#else
315static inline void ledtrig_flash_ctrl(bool on) {}
316static inline void ledtrig_torch_ctrl(bool on) {}
317#endif
318
319
320
321
322struct led_info {
323 const char *name;
324 const char *default_trigger;
325 int flags;
326};
327
328struct led_platform_data {
329 int num_leds;
330 struct led_info *leds;
331};
332
333
334struct gpio_led {
335 const char *name;
336 const char *default_trigger;
337 unsigned gpio;
338 unsigned active_low : 1;
339 unsigned retain_state_suspended : 1;
340 unsigned default_state : 2;
341
342 struct gpio_desc *gpiod;
343};
344#define LEDS_GPIO_DEFSTATE_OFF 0
345#define LEDS_GPIO_DEFSTATE_ON 1
346#define LEDS_GPIO_DEFSTATE_KEEP 2
347
348struct gpio_led_platform_data {
349 int num_leds;
350 const struct gpio_led *leds;
351
352#define GPIO_LED_NO_BLINK_LOW 0
353#define GPIO_LED_NO_BLINK_HIGH 1
354#define GPIO_LED_BLINK 2
355 int (*gpio_blink_set)(struct gpio_desc *desc, int state,
356 unsigned long *delay_on,
357 unsigned long *delay_off);
358};
359
360struct platform_device *gpio_led_register_device(
361 int id, const struct gpio_led_platform_data *pdata);
362
363enum cpu_led_event {
364 CPU_LED_IDLE_START,
365 CPU_LED_IDLE_END,
366 CPU_LED_START,
367 CPU_LED_STOP,
368 CPU_LED_HALTED,
369};
370#ifdef CONFIG_LEDS_TRIGGER_CPU
371extern void ledtrig_cpu(enum cpu_led_event evt);
372#else
373static inline void ledtrig_cpu(enum cpu_led_event evt)
374{
375 return;
376}
377#endif
378
379#endif
380