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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
c72a1d60 RP |
2 | /* |
3 | * Driver model for leds and led triggers | |
4 | * | |
5 | * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu> | |
6 | * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com> | |
c72a1d60 RP |
7 | */ |
8 | #ifndef __LINUX_LEDS_H_INCLUDED | |
9 | #define __LINUX_LEDS_H_INCLUDED | |
10 | ||
20f56758 | 11 | #include <linux/device.h> |
0cb8eb30 | 12 | #include <linux/kernfs.h> |
af410fc1 | 13 | #include <linux/list.h> |
acd899e4 | 14 | #include <linux/mutex.h> |
dc47206e | 15 | #include <linux/rwsem.h> |
04713306 | 16 | #include <linux/spinlock.h> |
9067359f | 17 | #include <linux/timer.h> |
d23a22a7 | 18 | #include <linux/workqueue.h> |
af410fc1 | 19 | |
c72a1d60 | 20 | struct device; |
5fd752b6 | 21 | struct led_pattern; |
c72a1d60 RP |
22 | /* |
23 | * LED Core | |
24 | */ | |
25 | ||
26 | enum led_brightness { | |
fb5035db | 27 | LED_OFF = 0, |
4e552c8c | 28 | LED_ON = 1, |
fb5035db BD |
29 | LED_HALF = 127, |
30 | LED_FULL = 255, | |
c72a1d60 RP |
31 | }; |
32 | ||
33 | struct led_classdev { | |
fb5035db | 34 | const char *name; |
d8082827 JA |
35 | enum led_brightness brightness; |
36 | enum led_brightness max_brightness; | |
fb5035db | 37 | int flags; |
c72a1d60 | 38 | |
859cb7f2 | 39 | /* Lower 16 bits reflect status */ |
55edd1da DL |
40 | #define LED_SUSPENDED BIT(0) |
41 | #define LED_UNREGISTERING BIT(1) | |
859cb7f2 | 42 | /* Upper 16 bits reflect control information */ |
55edd1da DL |
43 | #define LED_CORE_SUSPENDRESUME BIT(16) |
44 | #define LED_SYSFS_DISABLE BIT(17) | |
45 | #define LED_DEV_CAP_FLASH BIT(18) | |
46 | #define LED_HW_PLUGGABLE BIT(19) | |
47 | #define LED_PANIC_INDICATOR BIT(20) | |
48 | #define LED_BRIGHT_HW_CHANGED BIT(21) | |
49 | #define LED_RETAIN_AT_SHUTDOWN BIT(22) | |
02d31765 | 50 | #define LED_INIT_DEFAULT_TRIGGER BIT(23) |
a9c6ce57 HG |
51 | |
52 | /* set_brightness_work / blink_timer flags, atomic, private. */ | |
53 | unsigned long work_flags; | |
54 | ||
55 | #define LED_BLINK_SW 0 | |
56 | #define LED_BLINK_ONESHOT 1 | |
57 | #define LED_BLINK_ONESHOT_STOP 2 | |
58 | #define LED_BLINK_INVERT 3 | |
59 | #define LED_BLINK_BRIGHTNESS_CHANGE 4 | |
60 | #define LED_BLINK_DISABLE 5 | |
c72a1d60 | 61 | |
70b2563b HK |
62 | /* Set LED brightness level |
63 | * Must not sleep. Use brightness_set_blocking for drivers | |
64 | * that can sleep while setting brightness. | |
65 | */ | |
fb5035db BD |
66 | void (*brightness_set)(struct led_classdev *led_cdev, |
67 | enum led_brightness brightness); | |
4d71a4a1 JA |
68 | /* |
69 | * Set LED brightness level immediately - it can block the caller for | |
70 | * the time required for accessing a LED device register. | |
71 | */ | |
437a4240 JA |
72 | int (*brightness_set_blocking)(struct led_classdev *led_cdev, |
73 | enum led_brightness brightness); | |
29d76dfa HMH |
74 | /* Get LED brightness level */ |
75 | enum led_brightness (*brightness_get)(struct led_classdev *led_cdev); | |
fb5035db | 76 | |
5ada28bf JB |
77 | /* |
78 | * Activate hardware accelerated blink, delays are in milliseconds | |
79 | * and if both are zero then a sensible default should be chosen. | |
80 | * The call should adjust the timings in that case and if it can't | |
81 | * match the values specified exactly. | |
7cfe749f TM |
82 | * Deactivate blinking again when the brightness is set to LED_OFF |
83 | * via the brightness_set() callback. | |
5ada28bf | 84 | */ |
4c79141d MN |
85 | int (*blink_set)(struct led_classdev *led_cdev, |
86 | unsigned long *delay_on, | |
87 | unsigned long *delay_off); | |
88 | ||
5fd752b6 BW |
89 | int (*pattern_set)(struct led_classdev *led_cdev, |
90 | struct led_pattern *pattern, u32 len, int repeat); | |
91 | int (*pattern_clear)(struct led_classdev *led_cdev); | |
92 | ||
f8a7c6fe | 93 | struct device *dev; |
d0d480cc JH |
94 | const struct attribute_group **groups; |
95 | ||
fb5035db | 96 | struct list_head node; /* LED Device list */ |
781a54e7 | 97 | const char *default_trigger; /* Trigger to use */ |
c72a1d60 | 98 | |
5ada28bf | 99 | unsigned long blink_delay_on, blink_delay_off; |
9067359f | 100 | struct timer_list blink_timer; |
5ada28bf | 101 | int blink_brightness; |
eb1610b4 | 102 | int new_blink_brightness; |
7aea8389 | 103 | void (*flash_resume)(struct led_classdev *led_cdev); |
5ada28bf | 104 | |
d23a22a7 FB |
105 | struct work_struct set_brightness_work; |
106 | int delayed_set_value; | |
107 | ||
c3bc9956 | 108 | #ifdef CONFIG_LEDS_TRIGGERS |
c3bc9956 | 109 | /* Protects the trigger data below */ |
dc47206e | 110 | struct rw_semaphore trigger_lock; |
c3bc9956 | 111 | |
fb5035db BD |
112 | struct led_trigger *trigger; |
113 | struct list_head trig_list; | |
114 | void *trigger_data; | |
b0096182 SK |
115 | /* true if activated - deactivate routine uses it to do cleanup */ |
116 | bool activated; | |
c3bc9956 | 117 | #endif |
acd899e4 | 118 | |
0cb8eb30 HG |
119 | #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED |
120 | int brightness_hw_changed; | |
121 | struct kernfs_node *brightness_hw_changed_kn; | |
122 | #endif | |
123 | ||
acd899e4 JA |
124 | /* Ensures consistent access to the LED Flash Class device */ |
125 | struct mutex led_access; | |
c72a1d60 RP |
126 | }; |
127 | ||
442c6098 RM |
128 | extern int of_led_classdev_register(struct device *parent, |
129 | struct device_node *np, | |
130 | struct led_classdev *led_cdev); | |
131 | #define led_classdev_register(parent, led_cdev) \ | |
132 | of_led_classdev_register(parent, NULL, led_cdev) | |
133 | extern int devm_of_led_classdev_register(struct device *parent, | |
134 | struct device_node *np, | |
135 | struct led_classdev *led_cdev); | |
136 | #define devm_led_classdev_register(parent, led_cdev) \ | |
137 | devm_of_led_classdev_register(parent, NULL, led_cdev) | |
e2387d6c | 138 | extern void led_classdev_unregister(struct led_classdev *led_cdev); |
ca1bb4ee BA |
139 | extern void devm_led_classdev_unregister(struct device *parent, |
140 | struct led_classdev *led_cdev); | |
c72a1d60 RP |
141 | extern void led_classdev_suspend(struct led_classdev *led_cdev); |
142 | extern void led_classdev_resume(struct led_classdev *led_cdev); | |
143 | ||
5ada28bf JB |
144 | /** |
145 | * led_blink_set - set blinking with software fallback | |
146 | * @led_cdev: the LED to start blinking | |
147 | * @delay_on: the time it should be on (in ms) | |
148 | * @delay_off: the time it should ble off (in ms) | |
149 | * | |
150 | * This function makes the LED blink, attempting to use the | |
151 | * hardware acceleration if possible, but falling back to | |
152 | * software blinking if there is no hardware blinking or if | |
153 | * the LED refuses the passed values. | |
154 | * | |
155 | * Note that if software blinking is active, simply calling | |
156 | * led_cdev->brightness_set() will not stop the blinking, | |
157 | * use led_classdev_brightness_set() instead. | |
158 | */ | |
159 | extern void led_blink_set(struct led_classdev *led_cdev, | |
160 | unsigned long *delay_on, | |
161 | unsigned long *delay_off); | |
5bb629c5 FB |
162 | /** |
163 | * led_blink_set_oneshot - do a oneshot software blink | |
164 | * @led_cdev: the LED to start blinking | |
165 | * @delay_on: the time it should be on (in ms) | |
166 | * @delay_off: the time it should ble off (in ms) | |
167 | * @invert: blink off, then on, leaving the led on | |
168 | * | |
169 | * This function makes the LED blink one time for delay_on + | |
170 | * delay_off time, ignoring the request if another one-shot | |
171 | * blink is already in progress. | |
172 | * | |
173 | * If invert is set, led blinks for delay_off first, then for | |
174 | * delay_on and leave the led on after the on-off cycle. | |
175 | */ | |
176 | extern void led_blink_set_oneshot(struct led_classdev *led_cdev, | |
177 | unsigned long *delay_on, | |
178 | unsigned long *delay_off, | |
179 | int invert); | |
5ada28bf | 180 | /** |
19cd67e2 | 181 | * led_set_brightness - set LED brightness |
5ada28bf JB |
182 | * @led_cdev: the LED to set |
183 | * @brightness: the brightness to set it to | |
184 | * | |
185 | * Set an LED's brightness, and, if necessary, cancel the | |
186 | * software blink timer that implements blinking when the | |
1afcadfc | 187 | * hardware doesn't. This function is guaranteed not to sleep. |
5ada28bf | 188 | */ |
19cd67e2 | 189 | extern void led_set_brightness(struct led_classdev *led_cdev, |
5ada28bf | 190 | enum led_brightness brightness); |
13ae79bb JA |
191 | |
192 | /** | |
193 | * led_set_brightness_sync - set LED brightness synchronously | |
194 | * @led_cdev: the LED to set | |
195 | * @brightness: the brightness to set it to | |
196 | * | |
197 | * Set an LED's brightness immediately. This function will block | |
198 | * the caller for the time required for accessing device registers, | |
199 | * and it can sleep. | |
200 | * | |
201 | * Returns: 0 on success or negative error value on failure | |
202 | */ | |
203 | extern int led_set_brightness_sync(struct led_classdev *led_cdev, | |
204 | enum led_brightness value); | |
205 | ||
3ef7de53 JA |
206 | /** |
207 | * led_update_brightness - update LED brightness | |
208 | * @led_cdev: the LED to query | |
209 | * | |
210 | * Get an LED's current brightness and update led_cdev->brightness | |
211 | * member with the obtained value. | |
212 | * | |
213 | * Returns: 0 on success or negative error value on failure | |
214 | */ | |
215 | extern int led_update_brightness(struct led_classdev *led_cdev); | |
5ada28bf | 216 | |
8e1f4561 KK |
217 | /** |
218 | * led_get_default_pattern - return default pattern | |
219 | * | |
220 | * @led_cdev: the LED to get default pattern for | |
221 | * @size: pointer for storing the number of elements in returned array, | |
222 | * modified only if return != NULL | |
223 | * | |
224 | * Return: Allocated array of integers with default pattern from device tree | |
225 | * or NULL. Caller is responsible for kfree(). | |
226 | */ | |
227 | extern u32 *led_get_default_pattern(struct led_classdev *led_cdev, | |
228 | unsigned int *size); | |
229 | ||
acd899e4 JA |
230 | /** |
231 | * led_sysfs_disable - disable LED sysfs interface | |
232 | * @led_cdev: the LED to set | |
233 | * | |
234 | * Disable the led_cdev's sysfs interface. | |
235 | */ | |
236 | extern void led_sysfs_disable(struct led_classdev *led_cdev); | |
237 | ||
238 | /** | |
239 | * led_sysfs_enable - enable LED sysfs interface | |
240 | * @led_cdev: the LED to set | |
241 | * | |
242 | * Enable the led_cdev's sysfs interface. | |
243 | */ | |
244 | extern void led_sysfs_enable(struct led_classdev *led_cdev); | |
245 | ||
246 | /** | |
247 | * led_sysfs_is_disabled - check if LED sysfs interface is disabled | |
248 | * @led_cdev: the LED to query | |
249 | * | |
250 | * Returns: true if the led_cdev's sysfs interface is disabled. | |
251 | */ | |
252 | static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev) | |
253 | { | |
254 | return led_cdev->flags & LED_SYSFS_DISABLE; | |
255 | } | |
256 | ||
c3bc9956 RP |
257 | /* |
258 | * LED Triggers | |
259 | */ | |
39f7e08a KM |
260 | /* Registration functions for simple triggers */ |
261 | #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; | |
262 | #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; | |
263 | ||
c3bc9956 RP |
264 | #ifdef CONFIG_LEDS_TRIGGERS |
265 | ||
266 | #define TRIG_NAME_MAX 50 | |
267 | ||
268 | struct led_trigger { | |
269 | /* Trigger Properties */ | |
fb5035db | 270 | const char *name; |
2282e125 | 271 | int (*activate)(struct led_classdev *led_cdev); |
fb5035db | 272 | void (*deactivate)(struct led_classdev *led_cdev); |
c3bc9956 RP |
273 | |
274 | /* LEDs under control by this trigger (for simple triggers) */ | |
fb5035db BD |
275 | rwlock_t leddev_list_lock; |
276 | struct list_head led_cdevs; | |
c3bc9956 RP |
277 | |
278 | /* Link to next registered trigger */ | |
fb5035db | 279 | struct list_head next_trig; |
a7e7a315 UKK |
280 | |
281 | const struct attribute_group **groups; | |
c3bc9956 RP |
282 | }; |
283 | ||
a7e7a315 UKK |
284 | /* |
285 | * Currently the attributes in struct led_trigger::groups are added directly to | |
286 | * the LED device. As this might change in the future, the following | |
287 | * macros abstract getting the LED device and its trigger_data from the dev | |
288 | * parameter passed to the attribute accessor functions. | |
289 | */ | |
290 | #define led_trigger_get_led(dev) ((struct led_classdev *)dev_get_drvdata((dev))) | |
291 | #define led_trigger_get_drvdata(dev) (led_get_trigger_data(led_trigger_get_led(dev))) | |
292 | ||
20f56758 JA |
293 | ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr, |
294 | const char *buf, size_t count); | |
295 | ssize_t led_trigger_show(struct device *dev, struct device_attribute *attr, | |
296 | char *buf); | |
297 | ||
c3bc9956 RP |
298 | /* Registration functions for complex triggers */ |
299 | extern int led_trigger_register(struct led_trigger *trigger); | |
300 | extern void led_trigger_unregister(struct led_trigger *trigger); | |
9534cc31 HK |
301 | extern int devm_led_trigger_register(struct device *dev, |
302 | struct led_trigger *trigger); | |
c3bc9956 | 303 | |
c3bc9956 RP |
304 | extern void led_trigger_register_simple(const char *name, |
305 | struct led_trigger **trigger); | |
306 | extern void led_trigger_unregister_simple(struct led_trigger *trigger); | |
307 | extern void led_trigger_event(struct led_trigger *trigger, | |
308 | enum led_brightness event); | |
0b9536c9 VK |
309 | extern void led_trigger_blink(struct led_trigger *trigger, |
310 | unsigned long *delay_on, | |
311 | unsigned long *delay_off); | |
5bb629c5 FB |
312 | extern void led_trigger_blink_oneshot(struct led_trigger *trigger, |
313 | unsigned long *delay_on, | |
314 | unsigned long *delay_off, | |
315 | int invert); | |
20f56758 | 316 | extern void led_trigger_set_default(struct led_classdev *led_cdev); |
2282e125 UKK |
317 | extern int led_trigger_set(struct led_classdev *led_cdev, |
318 | struct led_trigger *trigger); | |
20f56758 JA |
319 | extern void led_trigger_remove(struct led_classdev *led_cdev); |
320 | ||
9acc560d UKK |
321 | static inline void led_set_trigger_data(struct led_classdev *led_cdev, |
322 | void *trigger_data) | |
323 | { | |
324 | led_cdev->trigger_data = trigger_data; | |
325 | } | |
326 | ||
20f56758 JA |
327 | static inline void *led_get_trigger_data(struct led_classdev *led_cdev) |
328 | { | |
329 | return led_cdev->trigger_data; | |
330 | } | |
331 | ||
057407c7 JH |
332 | /** |
333 | * led_trigger_rename_static - rename a trigger | |
334 | * @name: the new trigger name | |
335 | * @trig: the LED trigger to rename | |
336 | * | |
337 | * Change a LED trigger name by copying the string passed in | |
338 | * name into current trigger name, which MUST be large | |
339 | * enough for the new string. | |
340 | * | |
341 | * Note that name must NOT point to the same string used | |
342 | * during LED registration, as that could lead to races. | |
343 | * | |
344 | * This is meant to be used on triggers with statically | |
345 | * allocated name. | |
346 | */ | |
347 | extern void led_trigger_rename_static(const char *name, | |
348 | struct led_trigger *trig); | |
c3bc9956 | 349 | |
a0b75076 UKK |
350 | #define module_led_trigger(__led_trigger) \ |
351 | module_driver(__led_trigger, led_trigger_register, \ | |
352 | led_trigger_unregister) | |
353 | ||
c3bc9956 RP |
354 | #else |
355 | ||
39f7e08a KM |
356 | /* Trigger has no members */ |
357 | struct led_trigger {}; | |
c3bc9956 | 358 | |
39f7e08a KM |
359 | /* Trigger inline empty functions */ |
360 | static inline void led_trigger_register_simple(const char *name, | |
361 | struct led_trigger **trigger) {} | |
362 | static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {} | |
363 | static inline void led_trigger_event(struct led_trigger *trigger, | |
364 | enum led_brightness event) {} | |
8890624a MG |
365 | static inline void led_trigger_blink(struct led_trigger *trigger, |
366 | unsigned long *delay_on, | |
367 | unsigned long *delay_off) {} | |
368 | static inline void led_trigger_blink_oneshot(struct led_trigger *trigger, | |
369 | unsigned long *delay_on, | |
370 | unsigned long *delay_off, | |
371 | int invert) {} | |
20f56758 | 372 | static inline void led_trigger_set_default(struct led_classdev *led_cdev) {} |
2282e125 UKK |
373 | static inline int led_trigger_set(struct led_classdev *led_cdev, |
374 | struct led_trigger *trigger) | |
375 | { | |
376 | return 0; | |
377 | } | |
378 | ||
20f56758 | 379 | static inline void led_trigger_remove(struct led_classdev *led_cdev) {} |
9acc560d | 380 | static inline void led_set_trigger_data(struct led_classdev *led_cdev) {} |
20f56758 JA |
381 | static inline void *led_get_trigger_data(struct led_classdev *led_cdev) |
382 | { | |
383 | return NULL; | |
384 | } | |
385 | ||
39f7e08a | 386 | #endif /* CONFIG_LEDS_TRIGGERS */ |
2bfb646c RP |
387 | |
388 | /* Trigger specific functions */ | |
eb25cb99 | 389 | #ifdef CONFIG_LEDS_TRIGGER_DISK |
d1ed7c55 | 390 | extern void ledtrig_disk_activity(bool write); |
2bfb646c | 391 | #else |
d1ed7c55 | 392 | static inline void ledtrig_disk_activity(bool write) {} |
2bfb646c RP |
393 | #endif |
394 | ||
4b721174 EG |
395 | #ifdef CONFIG_LEDS_TRIGGER_MTD |
396 | extern void ledtrig_mtd_activity(void); | |
397 | #else | |
398 | static inline void ledtrig_mtd_activity(void) {} | |
399 | #endif | |
400 | ||
48a1d032 KM |
401 | #if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE) |
402 | extern void ledtrig_flash_ctrl(bool on); | |
403 | extern void ledtrig_torch_ctrl(bool on); | |
404 | #else | |
405 | static inline void ledtrig_flash_ctrl(bool on) {} | |
406 | static inline void ledtrig_torch_ctrl(bool on) {} | |
407 | #endif | |
408 | ||
f46e9203 NC |
409 | /* |
410 | * Generic LED platform data for describing LED names and default triggers. | |
411 | */ | |
412 | struct led_info { | |
413 | const char *name; | |
326bb8a5 | 414 | const char *default_trigger; |
f46e9203 NC |
415 | int flags; |
416 | }; | |
417 | ||
418 | struct led_platform_data { | |
419 | int num_leds; | |
420 | struct led_info *leds; | |
421 | }; | |
422 | ||
68620e59 HK |
423 | struct gpio_desc; |
424 | typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state, | |
425 | unsigned long *delay_on, | |
426 | unsigned long *delay_off); | |
427 | ||
22e03f3b RA |
428 | /* For the leds-gpio driver */ |
429 | struct gpio_led { | |
430 | const char *name; | |
326bb8a5 | 431 | const char *default_trigger; |
22e03f3b | 432 | unsigned gpio; |
ed88bae6 TP |
433 | unsigned active_low : 1; |
434 | unsigned retain_state_suspended : 1; | |
80d6737b | 435 | unsigned panic_indicator : 1; |
ed88bae6 | 436 | unsigned default_state : 2; |
f5808ac1 | 437 | unsigned retain_state_shutdown : 1; |
ed88bae6 | 438 | /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */ |
5c51277a | 439 | struct gpio_desc *gpiod; |
22e03f3b | 440 | }; |
2146325d BH |
441 | #define LEDS_GPIO_DEFSTATE_OFF 0 |
442 | #define LEDS_GPIO_DEFSTATE_ON 1 | |
443 | #define LEDS_GPIO_DEFSTATE_KEEP 2 | |
22e03f3b RA |
444 | |
445 | struct gpio_led_platform_data { | |
446 | int num_leds; | |
9517f925 | 447 | const struct gpio_led *leds; |
2146325d BH |
448 | |
449 | #define GPIO_LED_NO_BLINK_LOW 0 /* No blink GPIO state low */ | |
450 | #define GPIO_LED_NO_BLINK_HIGH 1 /* No blink GPIO state high */ | |
9517f925 | 451 | #define GPIO_LED_BLINK 2 /* Please, blink */ |
68620e59 | 452 | gpio_blink_set_t gpio_blink_set; |
22e03f3b RA |
453 | }; |
454 | ||
fca23e47 | 455 | #ifdef CONFIG_NEW_LEDS |
4440673a UKK |
456 | struct platform_device *gpio_led_register_device( |
457 | int id, const struct gpio_led_platform_data *pdata); | |
fca23e47 AD |
458 | #else |
459 | static inline struct platform_device *gpio_led_register_device( | |
460 | int id, const struct gpio_led_platform_data *pdata) | |
461 | { | |
462 | return 0; | |
463 | } | |
464 | #endif | |
22e03f3b | 465 | |
8f88731d BW |
466 | enum cpu_led_event { |
467 | CPU_LED_IDLE_START, /* CPU enters idle */ | |
468 | CPU_LED_IDLE_END, /* CPU idle ends */ | |
469 | CPU_LED_START, /* Machine starts, especially resume */ | |
470 | CPU_LED_STOP, /* Machine stops, especially suspend */ | |
471 | CPU_LED_HALTED, /* Machine shutdown */ | |
472 | }; | |
473 | #ifdef CONFIG_LEDS_TRIGGER_CPU | |
474 | extern void ledtrig_cpu(enum cpu_led_event evt); | |
475 | #else | |
476 | static inline void ledtrig_cpu(enum cpu_led_event evt) | |
477 | { | |
478 | return; | |
479 | } | |
480 | #endif | |
481 | ||
0cb8eb30 HG |
482 | #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED |
483 | extern void led_classdev_notify_brightness_hw_changed( | |
484 | struct led_classdev *led_cdev, enum led_brightness brightness); | |
485 | #else | |
486 | static inline void led_classdev_notify_brightness_hw_changed( | |
487 | struct led_classdev *led_cdev, enum led_brightness brightness) { } | |
488 | #endif | |
489 | ||
5fd752b6 BW |
490 | /** |
491 | * struct led_pattern - pattern interval settings | |
492 | * @delta_t: pattern interval delay, in milliseconds | |
493 | * @brightness: pattern interval brightness | |
494 | */ | |
495 | struct led_pattern { | |
496 | u32 delta_t; | |
497 | int brightness; | |
498 | }; | |
499 | ||
faa2541f TI |
500 | enum led_audio { |
501 | LED_AUDIO_MUTE, /* master mute LED */ | |
502 | LED_AUDIO_MICMUTE, /* mic mute LED */ | |
503 | NUM_AUDIO_LEDS | |
504 | }; | |
505 | ||
506 | #if IS_ENABLED(CONFIG_LEDS_TRIGGER_AUDIO) | |
507 | enum led_brightness ledtrig_audio_get(enum led_audio type); | |
508 | void ledtrig_audio_set(enum led_audio type, enum led_brightness state); | |
509 | #else | |
510 | static inline enum led_brightness ledtrig_audio_get(enum led_audio type) | |
511 | { | |
512 | return LED_OFF; | |
513 | } | |
514 | static inline void ledtrig_audio_set(enum led_audio type, | |
515 | enum led_brightness state) | |
516 | { | |
517 | } | |
518 | #endif | |
519 | ||
c72a1d60 | 520 | #endif /* __LINUX_LEDS_H_INCLUDED */ |