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a43f6a86 JA |
1 | /* |
2 | * LED Flash class driver for the flash cell of max77693 mfd. | |
3 | * | |
4 | * Copyright (C) 2015, Samsung Electronics Co., Ltd. | |
5 | * | |
6 | * Authors: Jacek Anaszewski <j.anaszewski@samsung.com> | |
7 | * Andrzej Hajda <a.hajda@samsung.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/led-class-flash.h> | |
15 | #include <linux/mfd/max77693.h> | |
16 | #include <linux/mfd/max77693-private.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/mutex.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/regmap.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/workqueue.h> | |
0b380186 | 23 | #include <media/v4l2-flash-led-class.h> |
a43f6a86 JA |
24 | |
25 | #define MODE_OFF 0 | |
26 | #define MODE_FLASH(a) (1 << (a)) | |
27 | #define MODE_TORCH(a) (1 << (2 + (a))) | |
28 | #define MODE_FLASH_EXTERNAL(a) (1 << (4 + (a))) | |
29 | ||
30 | #define MODE_FLASH_MASK (MODE_FLASH(FLED1) | MODE_FLASH(FLED2) | \ | |
31 | MODE_FLASH_EXTERNAL(FLED1) | \ | |
32 | MODE_FLASH_EXTERNAL(FLED2)) | |
33 | #define MODE_TORCH_MASK (MODE_TORCH(FLED1) | MODE_TORCH(FLED2)) | |
34 | ||
35 | #define FLED1_IOUT (1 << 0) | |
36 | #define FLED2_IOUT (1 << 1) | |
37 | ||
38 | enum max77693_fled { | |
39 | FLED1, | |
40 | FLED2, | |
41 | }; | |
42 | ||
43 | enum max77693_led_mode { | |
44 | FLASH, | |
45 | TORCH, | |
46 | }; | |
47 | ||
48 | struct max77693_led_config_data { | |
49 | const char *label[2]; | |
50 | u32 iout_torch_max[2]; | |
51 | u32 iout_flash_max[2]; | |
52 | u32 flash_timeout_max[2]; | |
53 | u32 num_leds; | |
54 | u32 boost_mode; | |
55 | u32 boost_vout; | |
56 | u32 low_vsys; | |
57 | }; | |
58 | ||
59 | struct max77693_sub_led { | |
60 | /* corresponding FLED output identifier */ | |
61 | int fled_id; | |
62 | /* corresponding LED Flash class device */ | |
63 | struct led_classdev_flash fled_cdev; | |
64 | /* assures led-triggers compatibility */ | |
65 | struct work_struct work_brightness_set; | |
0b380186 JA |
66 | /* V4L2 Flash device */ |
67 | struct v4l2_flash *v4l2_flash; | |
a43f6a86 JA |
68 | |
69 | /* brightness cache */ | |
70 | unsigned int torch_brightness; | |
71 | /* flash timeout cache */ | |
72 | unsigned int flash_timeout; | |
73 | /* flash faults that may have occurred */ | |
74 | u32 flash_faults; | |
75 | }; | |
76 | ||
77 | struct max77693_led_device { | |
78 | /* parent mfd regmap */ | |
79 | struct regmap *regmap; | |
80 | /* platform device data */ | |
81 | struct platform_device *pdev; | |
82 | /* secures access to the device */ | |
83 | struct mutex lock; | |
84 | ||
85 | /* sub led data */ | |
86 | struct max77693_sub_led sub_leds[2]; | |
87 | ||
88 | /* maximum torch current values for FLED outputs */ | |
89 | u32 iout_torch_max[2]; | |
90 | /* maximum flash current values for FLED outputs */ | |
91 | u32 iout_flash_max[2]; | |
92 | ||
93 | /* current flash timeout cache */ | |
94 | unsigned int current_flash_timeout; | |
95 | /* ITORCH register cache */ | |
96 | u8 torch_iout_reg; | |
97 | /* mode of fled outputs */ | |
98 | unsigned int mode_flags; | |
99 | /* recently strobed fled */ | |
100 | int strobing_sub_led_id; | |
101 | /* bitmask of FLED outputs use state (bit 0. - FLED1, bit 1. - FLED2) */ | |
102 | u8 fled_mask; | |
103 | /* FLED modes that can be set */ | |
104 | u8 allowed_modes; | |
105 | ||
106 | /* arrangement of current outputs */ | |
107 | bool iout_joint; | |
108 | }; | |
109 | ||
110 | static u8 max77693_led_iout_to_reg(u32 ua) | |
111 | { | |
112 | if (ua < FLASH_IOUT_MIN) | |
113 | ua = FLASH_IOUT_MIN; | |
114 | return (ua - FLASH_IOUT_MIN) / FLASH_IOUT_STEP; | |
115 | } | |
116 | ||
117 | static u8 max77693_flash_timeout_to_reg(u32 us) | |
118 | { | |
119 | return (us - FLASH_TIMEOUT_MIN) / FLASH_TIMEOUT_STEP; | |
120 | } | |
121 | ||
122 | static inline struct max77693_sub_led *flcdev_to_sub_led( | |
123 | struct led_classdev_flash *fled_cdev) | |
124 | { | |
125 | return container_of(fled_cdev, struct max77693_sub_led, fled_cdev); | |
126 | } | |
127 | ||
128 | static inline struct max77693_led_device *sub_led_to_led( | |
129 | struct max77693_sub_led *sub_led) | |
130 | { | |
131 | return container_of(sub_led, struct max77693_led_device, | |
132 | sub_leds[sub_led->fled_id]); | |
133 | } | |
134 | ||
135 | static inline u8 max77693_led_vsys_to_reg(u32 mv) | |
136 | { | |
137 | return ((mv - MAX_FLASH1_VSYS_MIN) / MAX_FLASH1_VSYS_STEP) << 2; | |
138 | } | |
139 | ||
140 | static inline u8 max77693_led_vout_to_reg(u32 mv) | |
141 | { | |
142 | return (mv - FLASH_VOUT_MIN) / FLASH_VOUT_STEP + FLASH_VOUT_RMIN; | |
143 | } | |
144 | ||
145 | static inline bool max77693_fled_used(struct max77693_led_device *led, | |
146 | int fled_id) | |
147 | { | |
148 | u8 fled_bit = (fled_id == FLED1) ? FLED1_IOUT : FLED2_IOUT; | |
149 | ||
150 | return led->fled_mask & fled_bit; | |
151 | } | |
152 | ||
153 | static int max77693_set_mode_reg(struct max77693_led_device *led, u8 mode) | |
154 | { | |
155 | struct regmap *rmap = led->regmap; | |
156 | int ret, v = 0, i; | |
157 | ||
158 | for (i = FLED1; i <= FLED2; ++i) { | |
159 | if (mode & MODE_TORCH(i)) | |
160 | v |= FLASH_EN_ON << TORCH_EN_SHIFT(i); | |
161 | ||
162 | if (mode & MODE_FLASH(i)) { | |
163 | v |= FLASH_EN_ON << FLASH_EN_SHIFT(i); | |
164 | } else if (mode & MODE_FLASH_EXTERNAL(i)) { | |
165 | v |= FLASH_EN_FLASH << FLASH_EN_SHIFT(i); | |
166 | /* | |
167 | * Enable hw triggering also for torch mode, as some | |
168 | * camera sensors use torch led to fathom ambient light | |
169 | * conditions before strobing the flash. | |
170 | */ | |
171 | v |= FLASH_EN_TORCH << TORCH_EN_SHIFT(i); | |
172 | } | |
173 | } | |
174 | ||
175 | /* Reset the register only prior setting flash modes */ | |
176 | if (mode & ~(MODE_TORCH(FLED1) | MODE_TORCH(FLED2))) { | |
177 | ret = regmap_write(rmap, MAX77693_LED_REG_FLASH_EN, 0); | |
178 | if (ret < 0) | |
179 | return ret; | |
180 | } | |
181 | ||
182 | return regmap_write(rmap, MAX77693_LED_REG_FLASH_EN, v); | |
183 | } | |
184 | ||
185 | static int max77693_add_mode(struct max77693_led_device *led, u8 mode) | |
186 | { | |
187 | u8 new_mode_flags; | |
188 | int i, ret; | |
189 | ||
190 | if (led->iout_joint) | |
191 | /* Span the mode on FLED2 for joint iouts case */ | |
192 | mode |= (mode << 1); | |
193 | ||
194 | /* | |
195 | * FLASH_EXTERNAL mode activates FLASHEN and TORCHEN pins in the device. | |
196 | * Corresponding register bit fields interfere with SW triggered modes, | |
197 | * thus clear them to ensure proper device configuration. | |
198 | */ | |
199 | for (i = FLED1; i <= FLED2; ++i) | |
200 | if (mode & MODE_FLASH_EXTERNAL(i)) | |
201 | led->mode_flags &= (~MODE_TORCH(i) & ~MODE_FLASH(i)); | |
202 | ||
203 | new_mode_flags = mode | led->mode_flags; | |
204 | new_mode_flags &= led->allowed_modes; | |
205 | ||
206 | if (new_mode_flags ^ led->mode_flags) | |
207 | led->mode_flags = new_mode_flags; | |
208 | else | |
209 | return 0; | |
210 | ||
211 | ret = max77693_set_mode_reg(led, led->mode_flags); | |
212 | if (ret < 0) | |
213 | return ret; | |
214 | ||
215 | /* | |
216 | * Clear flash mode flag after setting the mode to avoid spurious flash | |
217 | * strobing on each subsequent torch mode setting. | |
218 | */ | |
219 | if (mode & MODE_FLASH_MASK) | |
220 | led->mode_flags &= ~mode; | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
225 | static int max77693_clear_mode(struct max77693_led_device *led, | |
226 | u8 mode) | |
227 | { | |
228 | if (led->iout_joint) | |
229 | /* Clear mode also on FLED2 for joint iouts case */ | |
230 | mode |= (mode << 1); | |
231 | ||
232 | led->mode_flags &= ~mode; | |
233 | ||
234 | return max77693_set_mode_reg(led, led->mode_flags); | |
235 | } | |
236 | ||
237 | static void max77693_add_allowed_modes(struct max77693_led_device *led, | |
238 | int fled_id, enum max77693_led_mode mode) | |
239 | { | |
240 | if (mode == FLASH) | |
241 | led->allowed_modes |= (MODE_FLASH(fled_id) | | |
242 | MODE_FLASH_EXTERNAL(fled_id)); | |
243 | else | |
244 | led->allowed_modes |= MODE_TORCH(fled_id); | |
245 | } | |
246 | ||
247 | static void max77693_distribute_currents(struct max77693_led_device *led, | |
248 | int fled_id, enum max77693_led_mode mode, | |
249 | u32 micro_amp, u32 iout_max[2], u32 iout[2]) | |
250 | { | |
251 | if (!led->iout_joint) { | |
252 | iout[fled_id] = micro_amp; | |
253 | max77693_add_allowed_modes(led, fled_id, mode); | |
254 | return; | |
255 | } | |
256 | ||
257 | iout[FLED1] = min(micro_amp, iout_max[FLED1]); | |
258 | iout[FLED2] = micro_amp - iout[FLED1]; | |
259 | ||
260 | if (mode == FLASH) | |
261 | led->allowed_modes &= ~MODE_FLASH_MASK; | |
262 | else | |
263 | led->allowed_modes &= ~MODE_TORCH_MASK; | |
264 | ||
265 | max77693_add_allowed_modes(led, FLED1, mode); | |
266 | ||
267 | if (iout[FLED2]) | |
268 | max77693_add_allowed_modes(led, FLED2, mode); | |
269 | } | |
270 | ||
271 | static int max77693_set_torch_current(struct max77693_led_device *led, | |
272 | int fled_id, u32 micro_amp) | |
273 | { | |
274 | struct regmap *rmap = led->regmap; | |
275 | u8 iout1_reg = 0, iout2_reg = 0; | |
276 | u32 iout[2]; | |
277 | ||
278 | max77693_distribute_currents(led, fled_id, TORCH, micro_amp, | |
279 | led->iout_torch_max, iout); | |
280 | ||
281 | if (fled_id == FLED1 || led->iout_joint) { | |
282 | iout1_reg = max77693_led_iout_to_reg(iout[FLED1]); | |
283 | led->torch_iout_reg &= TORCH_IOUT_MASK(TORCH_IOUT2_SHIFT); | |
284 | } | |
285 | if (fled_id == FLED2 || led->iout_joint) { | |
286 | iout2_reg = max77693_led_iout_to_reg(iout[FLED2]); | |
287 | led->torch_iout_reg &= TORCH_IOUT_MASK(TORCH_IOUT1_SHIFT); | |
288 | } | |
289 | ||
290 | led->torch_iout_reg |= ((iout1_reg << TORCH_IOUT1_SHIFT) | | |
291 | (iout2_reg << TORCH_IOUT2_SHIFT)); | |
292 | ||
293 | return regmap_write(rmap, MAX77693_LED_REG_ITORCH, | |
294 | led->torch_iout_reg); | |
295 | } | |
296 | ||
297 | static int max77693_set_flash_current(struct max77693_led_device *led, | |
298 | int fled_id, | |
299 | u32 micro_amp) | |
300 | { | |
301 | struct regmap *rmap = led->regmap; | |
302 | u8 iout1_reg, iout2_reg; | |
303 | u32 iout[2]; | |
304 | int ret = -EINVAL; | |
305 | ||
306 | max77693_distribute_currents(led, fled_id, FLASH, micro_amp, | |
307 | led->iout_flash_max, iout); | |
308 | ||
309 | if (fled_id == FLED1 || led->iout_joint) { | |
310 | iout1_reg = max77693_led_iout_to_reg(iout[FLED1]); | |
311 | ret = regmap_write(rmap, MAX77693_LED_REG_IFLASH1, | |
312 | iout1_reg); | |
313 | if (ret < 0) | |
314 | return ret; | |
315 | } | |
316 | if (fled_id == FLED2 || led->iout_joint) { | |
317 | iout2_reg = max77693_led_iout_to_reg(iout[FLED2]); | |
318 | ret = regmap_write(rmap, MAX77693_LED_REG_IFLASH2, | |
319 | iout2_reg); | |
320 | } | |
321 | ||
322 | return ret; | |
323 | } | |
324 | ||
325 | static int max77693_set_timeout(struct max77693_led_device *led, u32 microsec) | |
326 | { | |
327 | struct regmap *rmap = led->regmap; | |
328 | u8 v; | |
329 | int ret; | |
330 | ||
331 | v = max77693_flash_timeout_to_reg(microsec) | FLASH_TMR_LEVEL; | |
332 | ||
333 | ret = regmap_write(rmap, MAX77693_LED_REG_FLASH_TIMER, v); | |
334 | if (ret < 0) | |
335 | return ret; | |
336 | ||
337 | led->current_flash_timeout = microsec; | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
342 | static int max77693_get_strobe_status(struct max77693_led_device *led, | |
343 | bool *state) | |
344 | { | |
345 | struct regmap *rmap = led->regmap; | |
346 | unsigned int v; | |
347 | int ret; | |
348 | ||
349 | ret = regmap_read(rmap, MAX77693_LED_REG_FLASH_STATUS, &v); | |
350 | if (ret < 0) | |
351 | return ret; | |
352 | ||
353 | *state = v & FLASH_STATUS_FLASH_ON; | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
358 | static int max77693_get_flash_faults(struct max77693_sub_led *sub_led) | |
359 | { | |
360 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
361 | struct regmap *rmap = led->regmap; | |
362 | unsigned int v; | |
363 | u8 fault_open_mask, fault_short_mask; | |
364 | int ret; | |
365 | ||
366 | sub_led->flash_faults = 0; | |
367 | ||
368 | if (led->iout_joint) { | |
369 | fault_open_mask = FLASH_INT_FLED1_OPEN | FLASH_INT_FLED2_OPEN; | |
370 | fault_short_mask = FLASH_INT_FLED1_SHORT | | |
371 | FLASH_INT_FLED2_SHORT; | |
372 | } else { | |
373 | fault_open_mask = (sub_led->fled_id == FLED1) ? | |
374 | FLASH_INT_FLED1_OPEN : | |
375 | FLASH_INT_FLED2_OPEN; | |
376 | fault_short_mask = (sub_led->fled_id == FLED1) ? | |
377 | FLASH_INT_FLED1_SHORT : | |
378 | FLASH_INT_FLED2_SHORT; | |
379 | } | |
380 | ||
381 | ret = regmap_read(rmap, MAX77693_LED_REG_FLASH_INT, &v); | |
382 | if (ret < 0) | |
383 | return ret; | |
384 | ||
385 | if (v & fault_open_mask) | |
386 | sub_led->flash_faults |= LED_FAULT_OVER_VOLTAGE; | |
387 | if (v & fault_short_mask) | |
388 | sub_led->flash_faults |= LED_FAULT_SHORT_CIRCUIT; | |
389 | if (v & FLASH_INT_OVER_CURRENT) | |
390 | sub_led->flash_faults |= LED_FAULT_OVER_CURRENT; | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
395 | static int max77693_setup(struct max77693_led_device *led, | |
396 | struct max77693_led_config_data *led_cfg) | |
397 | { | |
398 | struct regmap *rmap = led->regmap; | |
399 | int i, first_led, last_led, ret; | |
400 | u32 max_flash_curr[2]; | |
401 | u8 v; | |
402 | ||
403 | /* | |
404 | * Initialize only flash current. Torch current doesn't | |
405 | * require initialization as ITORCH register is written with | |
406 | * new value each time brightness_set op is called. | |
407 | */ | |
408 | if (led->iout_joint) { | |
409 | first_led = FLED1; | |
410 | last_led = FLED1; | |
411 | max_flash_curr[FLED1] = led_cfg->iout_flash_max[FLED1] + | |
412 | led_cfg->iout_flash_max[FLED2]; | |
413 | } else { | |
414 | first_led = max77693_fled_used(led, FLED1) ? FLED1 : FLED2; | |
415 | last_led = max77693_fled_used(led, FLED2) ? FLED2 : FLED1; | |
416 | max_flash_curr[FLED1] = led_cfg->iout_flash_max[FLED1]; | |
417 | max_flash_curr[FLED2] = led_cfg->iout_flash_max[FLED2]; | |
418 | } | |
419 | ||
420 | for (i = first_led; i <= last_led; ++i) { | |
421 | ret = max77693_set_flash_current(led, i, | |
422 | max_flash_curr[i]); | |
423 | if (ret < 0) | |
424 | return ret; | |
425 | } | |
426 | ||
427 | v = TORCH_TMR_NO_TIMER | MAX77693_LED_TRIG_TYPE_LEVEL; | |
428 | ret = regmap_write(rmap, MAX77693_LED_REG_ITORCHTIMER, v); | |
429 | if (ret < 0) | |
430 | return ret; | |
431 | ||
432 | if (led_cfg->low_vsys > 0) | |
433 | v = max77693_led_vsys_to_reg(led_cfg->low_vsys) | | |
434 | MAX_FLASH1_MAX_FL_EN; | |
435 | else | |
436 | v = 0; | |
437 | ||
438 | ret = regmap_write(rmap, MAX77693_LED_REG_MAX_FLASH1, v); | |
439 | if (ret < 0) | |
440 | return ret; | |
441 | ret = regmap_write(rmap, MAX77693_LED_REG_MAX_FLASH2, 0); | |
442 | if (ret < 0) | |
443 | return ret; | |
444 | ||
445 | if (led_cfg->boost_mode == MAX77693_LED_BOOST_FIXED) | |
446 | v = FLASH_BOOST_FIXED; | |
447 | else | |
448 | v = led_cfg->boost_mode | led_cfg->boost_mode << 1; | |
449 | ||
450 | if (max77693_fled_used(led, FLED1) && max77693_fled_used(led, FLED2)) | |
451 | v |= FLASH_BOOST_LEDNUM_2; | |
452 | ||
453 | ret = regmap_write(rmap, MAX77693_LED_REG_VOUT_CNTL, v); | |
454 | if (ret < 0) | |
455 | return ret; | |
456 | ||
457 | v = max77693_led_vout_to_reg(led_cfg->boost_vout); | |
458 | ret = regmap_write(rmap, MAX77693_LED_REG_VOUT_FLASH1, v); | |
459 | if (ret < 0) | |
460 | return ret; | |
461 | ||
462 | return max77693_set_mode_reg(led, MODE_OFF); | |
463 | } | |
464 | ||
465 | static int __max77693_led_brightness_set(struct max77693_led_device *led, | |
466 | int fled_id, enum led_brightness value) | |
467 | { | |
468 | int ret; | |
469 | ||
470 | mutex_lock(&led->lock); | |
471 | ||
472 | if (value == 0) { | |
473 | ret = max77693_clear_mode(led, MODE_TORCH(fled_id)); | |
474 | if (ret < 0) | |
475 | dev_dbg(&led->pdev->dev, | |
476 | "Failed to clear torch mode (%d)\n", | |
477 | ret); | |
478 | goto unlock; | |
479 | } | |
480 | ||
481 | ret = max77693_set_torch_current(led, fled_id, value * TORCH_IOUT_STEP); | |
482 | if (ret < 0) { | |
483 | dev_dbg(&led->pdev->dev, | |
484 | "Failed to set torch current (%d)\n", | |
485 | ret); | |
486 | goto unlock; | |
487 | } | |
488 | ||
489 | ret = max77693_add_mode(led, MODE_TORCH(fled_id)); | |
490 | if (ret < 0) | |
491 | dev_dbg(&led->pdev->dev, | |
492 | "Failed to set torch mode (%d)\n", | |
493 | ret); | |
494 | unlock: | |
495 | mutex_unlock(&led->lock); | |
496 | return ret; | |
497 | } | |
498 | ||
499 | static void max77693_led_brightness_set_work( | |
500 | struct work_struct *work) | |
501 | { | |
502 | struct max77693_sub_led *sub_led = | |
503 | container_of(work, struct max77693_sub_led, | |
504 | work_brightness_set); | |
505 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
506 | ||
507 | __max77693_led_brightness_set(led, sub_led->fled_id, | |
508 | sub_led->torch_brightness); | |
509 | } | |
510 | ||
511 | /* LED subsystem callbacks */ | |
512 | ||
513 | static int max77693_led_brightness_set_sync( | |
514 | struct led_classdev *led_cdev, | |
515 | enum led_brightness value) | |
516 | { | |
517 | struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev); | |
518 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
519 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
520 | ||
521 | return __max77693_led_brightness_set(led, sub_led->fled_id, value); | |
522 | } | |
523 | ||
524 | static void max77693_led_brightness_set( | |
525 | struct led_classdev *led_cdev, | |
526 | enum led_brightness value) | |
527 | { | |
528 | struct led_classdev_flash *fled_cdev = lcdev_to_flcdev(led_cdev); | |
529 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
530 | ||
531 | sub_led->torch_brightness = value; | |
532 | schedule_work(&sub_led->work_brightness_set); | |
533 | } | |
534 | ||
535 | static int max77693_led_flash_brightness_set( | |
536 | struct led_classdev_flash *fled_cdev, | |
537 | u32 brightness) | |
538 | { | |
539 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
540 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
541 | int ret; | |
542 | ||
543 | mutex_lock(&led->lock); | |
544 | ret = max77693_set_flash_current(led, sub_led->fled_id, brightness); | |
545 | mutex_unlock(&led->lock); | |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
550 | static int max77693_led_flash_strobe_set( | |
551 | struct led_classdev_flash *fled_cdev, | |
552 | bool state) | |
553 | { | |
554 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
555 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
556 | int fled_id = sub_led->fled_id; | |
557 | int ret; | |
558 | ||
559 | mutex_lock(&led->lock); | |
560 | ||
561 | if (!state) { | |
562 | ret = max77693_clear_mode(led, MODE_FLASH(fled_id)); | |
563 | goto unlock; | |
564 | } | |
565 | ||
566 | if (sub_led->flash_timeout != led->current_flash_timeout) { | |
567 | ret = max77693_set_timeout(led, sub_led->flash_timeout); | |
568 | if (ret < 0) | |
569 | goto unlock; | |
570 | } | |
571 | ||
572 | led->strobing_sub_led_id = fled_id; | |
573 | ||
574 | ret = max77693_add_mode(led, MODE_FLASH(fled_id)); | |
575 | if (ret < 0) | |
576 | goto unlock; | |
577 | ||
578 | ret = max77693_get_flash_faults(sub_led); | |
579 | ||
580 | unlock: | |
581 | mutex_unlock(&led->lock); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | static int max77693_led_flash_fault_get( | |
586 | struct led_classdev_flash *fled_cdev, | |
587 | u32 *fault) | |
588 | { | |
589 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
590 | ||
591 | *fault = sub_led->flash_faults; | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | static int max77693_led_flash_strobe_get( | |
597 | struct led_classdev_flash *fled_cdev, | |
598 | bool *state) | |
599 | { | |
600 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
601 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
602 | int ret; | |
603 | ||
604 | if (!state) | |
605 | return -EINVAL; | |
606 | ||
607 | mutex_lock(&led->lock); | |
608 | ||
609 | ret = max77693_get_strobe_status(led, state); | |
610 | ||
611 | *state = !!(*state && (led->strobing_sub_led_id == sub_led->fled_id)); | |
612 | ||
613 | mutex_unlock(&led->lock); | |
614 | ||
615 | return ret; | |
616 | } | |
617 | ||
618 | static int max77693_led_flash_timeout_set( | |
619 | struct led_classdev_flash *fled_cdev, | |
620 | u32 timeout) | |
621 | { | |
622 | struct max77693_sub_led *sub_led = flcdev_to_sub_led(fled_cdev); | |
623 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
624 | ||
625 | mutex_lock(&led->lock); | |
626 | sub_led->flash_timeout = timeout; | |
627 | mutex_unlock(&led->lock); | |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
632 | static int max77693_led_parse_dt(struct max77693_led_device *led, | |
0b380186 JA |
633 | struct max77693_led_config_data *cfg, |
634 | struct device_node **sub_nodes) | |
a43f6a86 JA |
635 | { |
636 | struct device *dev = &led->pdev->dev; | |
637 | struct max77693_sub_led *sub_leds = led->sub_leds; | |
638 | struct device_node *node = dev->of_node, *child_node; | |
639 | struct property *prop; | |
640 | u32 led_sources[2]; | |
641 | int i, ret, fled_id; | |
642 | ||
643 | of_property_read_u32(node, "maxim,boost-mode", &cfg->boost_mode); | |
644 | of_property_read_u32(node, "maxim,boost-mvout", &cfg->boost_vout); | |
645 | of_property_read_u32(node, "maxim,mvsys-min", &cfg->low_vsys); | |
646 | ||
647 | for_each_available_child_of_node(node, child_node) { | |
648 | prop = of_find_property(child_node, "led-sources", NULL); | |
649 | if (prop) { | |
650 | const __be32 *srcs = NULL; | |
651 | ||
652 | for (i = 0; i < ARRAY_SIZE(led_sources); ++i) { | |
653 | srcs = of_prop_next_u32(prop, srcs, | |
654 | &led_sources[i]); | |
655 | if (!srcs) | |
656 | break; | |
657 | } | |
658 | } else { | |
659 | dev_err(dev, | |
660 | "led-sources DT property missing\n"); | |
661 | of_node_put(child_node); | |
662 | return -EINVAL; | |
663 | } | |
664 | ||
665 | if (i == 2) { | |
666 | fled_id = FLED1; | |
667 | led->fled_mask = FLED1_IOUT | FLED2_IOUT; | |
668 | } else if (led_sources[0] == FLED1) { | |
669 | fled_id = FLED1; | |
670 | led->fled_mask |= FLED1_IOUT; | |
671 | } else if (led_sources[0] == FLED2) { | |
672 | fled_id = FLED2; | |
673 | led->fled_mask |= FLED2_IOUT; | |
674 | } else { | |
675 | dev_err(dev, | |
676 | "Wrong led-sources DT property value.\n"); | |
677 | of_node_put(child_node); | |
678 | return -EINVAL; | |
679 | } | |
680 | ||
0b380186 JA |
681 | if (sub_nodes[fled_id]) { |
682 | dev_err(dev, | |
683 | "Conflicting \"led-sources\" DT properties\n"); | |
684 | return -EINVAL; | |
685 | } | |
686 | ||
687 | sub_nodes[fled_id] = child_node; | |
a43f6a86 JA |
688 | sub_leds[fled_id].fled_id = fled_id; |
689 | ||
690 | cfg->label[fled_id] = | |
691 | of_get_property(child_node, "label", NULL) ? : | |
692 | child_node->name; | |
693 | ||
694 | ret = of_property_read_u32(child_node, "led-max-microamp", | |
695 | &cfg->iout_torch_max[fled_id]); | |
696 | if (ret < 0) { | |
697 | cfg->iout_torch_max[fled_id] = TORCH_IOUT_MIN; | |
698 | dev_warn(dev, "led-max-microamp DT property missing\n"); | |
699 | } | |
700 | ||
701 | ret = of_property_read_u32(child_node, "flash-max-microamp", | |
702 | &cfg->iout_flash_max[fled_id]); | |
703 | if (ret < 0) { | |
704 | cfg->iout_flash_max[fled_id] = FLASH_IOUT_MIN; | |
705 | dev_warn(dev, | |
706 | "flash-max-microamp DT property missing\n"); | |
707 | } | |
708 | ||
709 | ret = of_property_read_u32(child_node, "flash-max-timeout-us", | |
710 | &cfg->flash_timeout_max[fled_id]); | |
711 | if (ret < 0) { | |
712 | cfg->flash_timeout_max[fled_id] = FLASH_TIMEOUT_MIN; | |
713 | dev_warn(dev, | |
714 | "flash-max-timeout-us DT property missing\n"); | |
715 | } | |
716 | ||
717 | if (++cfg->num_leds == 2 || | |
718 | (max77693_fled_used(led, FLED1) && | |
719 | max77693_fled_used(led, FLED2))) { | |
720 | of_node_put(child_node); | |
721 | break; | |
722 | } | |
723 | } | |
724 | ||
725 | if (cfg->num_leds == 0) { | |
726 | dev_err(dev, "No DT child node found for connected LED(s).\n"); | |
727 | return -EINVAL; | |
728 | } | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
733 | static void clamp_align(u32 *v, u32 min, u32 max, u32 step) | |
734 | { | |
735 | *v = clamp_val(*v, min, max); | |
736 | if (step > 1) | |
737 | *v = (*v - min) / step * step + min; | |
738 | } | |
739 | ||
740 | static void max77693_align_iout_current(struct max77693_led_device *led, | |
741 | u32 *iout, u32 min, u32 max, u32 step) | |
742 | { | |
743 | int i; | |
744 | ||
745 | if (led->iout_joint) { | |
746 | if (iout[FLED1] > min) { | |
747 | iout[FLED1] /= 2; | |
748 | iout[FLED2] = iout[FLED1]; | |
749 | } else { | |
750 | iout[FLED1] = min; | |
751 | iout[FLED2] = 0; | |
752 | return; | |
753 | } | |
754 | } | |
755 | ||
756 | for (i = FLED1; i <= FLED2; ++i) | |
757 | if (max77693_fled_used(led, i)) | |
758 | clamp_align(&iout[i], min, max, step); | |
759 | else | |
760 | iout[i] = 0; | |
761 | } | |
762 | ||
763 | static void max77693_led_validate_configuration(struct max77693_led_device *led, | |
764 | struct max77693_led_config_data *cfg) | |
765 | { | |
766 | u32 flash_iout_max = cfg->boost_mode ? FLASH_IOUT_MAX_2LEDS : | |
767 | FLASH_IOUT_MAX_1LED; | |
768 | int i; | |
769 | ||
770 | if (cfg->num_leds == 1 && | |
771 | max77693_fled_used(led, FLED1) && max77693_fled_used(led, FLED2)) | |
772 | led->iout_joint = true; | |
773 | ||
774 | cfg->boost_mode = clamp_val(cfg->boost_mode, MAX77693_LED_BOOST_NONE, | |
775 | MAX77693_LED_BOOST_FIXED); | |
776 | ||
777 | /* Boost must be enabled if both current outputs are used */ | |
778 | if ((cfg->boost_mode == MAX77693_LED_BOOST_NONE) && led->iout_joint) | |
779 | cfg->boost_mode = MAX77693_LED_BOOST_FIXED; | |
780 | ||
781 | max77693_align_iout_current(led, cfg->iout_torch_max, | |
782 | TORCH_IOUT_MIN, TORCH_IOUT_MAX, TORCH_IOUT_STEP); | |
783 | ||
784 | max77693_align_iout_current(led, cfg->iout_flash_max, | |
785 | FLASH_IOUT_MIN, flash_iout_max, FLASH_IOUT_STEP); | |
786 | ||
787 | for (i = 0; i < ARRAY_SIZE(cfg->flash_timeout_max); ++i) | |
788 | clamp_align(&cfg->flash_timeout_max[i], FLASH_TIMEOUT_MIN, | |
789 | FLASH_TIMEOUT_MAX, FLASH_TIMEOUT_STEP); | |
790 | ||
791 | clamp_align(&cfg->boost_vout, FLASH_VOUT_MIN, FLASH_VOUT_MAX, | |
792 | FLASH_VOUT_STEP); | |
793 | ||
794 | if (cfg->low_vsys) | |
795 | clamp_align(&cfg->low_vsys, MAX_FLASH1_VSYS_MIN, | |
796 | MAX_FLASH1_VSYS_MAX, MAX_FLASH1_VSYS_STEP); | |
797 | } | |
798 | ||
799 | static int max77693_led_get_configuration(struct max77693_led_device *led, | |
0b380186 JA |
800 | struct max77693_led_config_data *cfg, |
801 | struct device_node **sub_nodes) | |
a43f6a86 JA |
802 | { |
803 | int ret; | |
804 | ||
0b380186 | 805 | ret = max77693_led_parse_dt(led, cfg, sub_nodes); |
a43f6a86 JA |
806 | if (ret < 0) |
807 | return ret; | |
808 | ||
809 | max77693_led_validate_configuration(led, cfg); | |
810 | ||
811 | memcpy(led->iout_torch_max, cfg->iout_torch_max, | |
812 | sizeof(led->iout_torch_max)); | |
813 | memcpy(led->iout_flash_max, cfg->iout_flash_max, | |
814 | sizeof(led->iout_flash_max)); | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
819 | static const struct led_flash_ops flash_ops = { | |
820 | .flash_brightness_set = max77693_led_flash_brightness_set, | |
821 | .strobe_set = max77693_led_flash_strobe_set, | |
822 | .strobe_get = max77693_led_flash_strobe_get, | |
823 | .timeout_set = max77693_led_flash_timeout_set, | |
824 | .fault_get = max77693_led_flash_fault_get, | |
825 | }; | |
826 | ||
827 | static void max77693_init_flash_settings(struct max77693_sub_led *sub_led, | |
828 | struct max77693_led_config_data *led_cfg) | |
829 | { | |
830 | struct led_classdev_flash *fled_cdev = &sub_led->fled_cdev; | |
831 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
832 | int fled_id = sub_led->fled_id; | |
833 | struct led_flash_setting *setting; | |
834 | ||
835 | /* Init flash intensity setting */ | |
836 | setting = &fled_cdev->brightness; | |
837 | setting->min = FLASH_IOUT_MIN; | |
838 | setting->max = led->iout_joint ? | |
839 | led_cfg->iout_flash_max[FLED1] + | |
840 | led_cfg->iout_flash_max[FLED2] : | |
841 | led_cfg->iout_flash_max[fled_id]; | |
842 | setting->step = FLASH_IOUT_STEP; | |
843 | setting->val = setting->max; | |
844 | ||
845 | /* Init flash timeout setting */ | |
846 | setting = &fled_cdev->timeout; | |
847 | setting->min = FLASH_TIMEOUT_MIN; | |
848 | setting->max = led_cfg->flash_timeout_max[fled_id]; | |
849 | setting->step = FLASH_TIMEOUT_STEP; | |
850 | setting->val = setting->max; | |
851 | } | |
852 | ||
0b380186 JA |
853 | #if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) |
854 | ||
855 | static int max77693_led_external_strobe_set( | |
856 | struct v4l2_flash *v4l2_flash, | |
857 | bool enable) | |
858 | { | |
859 | struct max77693_sub_led *sub_led = | |
860 | flcdev_to_sub_led(v4l2_flash->fled_cdev); | |
861 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
862 | int fled_id = sub_led->fled_id; | |
863 | int ret; | |
864 | ||
865 | mutex_lock(&led->lock); | |
866 | ||
867 | if (enable) | |
868 | ret = max77693_add_mode(led, MODE_FLASH_EXTERNAL(fled_id)); | |
869 | else | |
870 | ret = max77693_clear_mode(led, MODE_FLASH_EXTERNAL(fled_id)); | |
871 | ||
872 | mutex_unlock(&led->lock); | |
873 | ||
874 | return ret; | |
875 | } | |
876 | ||
877 | static void max77693_init_v4l2_flash_config(struct max77693_sub_led *sub_led, | |
878 | struct max77693_led_config_data *led_cfg, | |
879 | struct v4l2_flash_config *v4l2_sd_cfg) | |
880 | { | |
881 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
882 | struct device *dev = &led->pdev->dev; | |
883 | struct max77693_dev *iodev = dev_get_drvdata(dev->parent); | |
884 | struct i2c_client *i2c = iodev->i2c; | |
885 | struct led_flash_setting *s; | |
886 | ||
887 | snprintf(v4l2_sd_cfg->dev_name, sizeof(v4l2_sd_cfg->dev_name), | |
888 | "%s %d-%04x", sub_led->fled_cdev.led_cdev.name, | |
889 | i2c_adapter_id(i2c->adapter), i2c->addr); | |
890 | ||
891 | s = &v4l2_sd_cfg->torch_intensity; | |
892 | s->min = TORCH_IOUT_MIN; | |
893 | s->max = sub_led->fled_cdev.led_cdev.max_brightness * TORCH_IOUT_STEP; | |
894 | s->step = TORCH_IOUT_STEP; | |
895 | s->val = s->max; | |
896 | ||
897 | /* Init flash faults config */ | |
898 | v4l2_sd_cfg->flash_faults = LED_FAULT_OVER_VOLTAGE | | |
899 | LED_FAULT_SHORT_CIRCUIT | | |
900 | LED_FAULT_OVER_CURRENT; | |
901 | ||
902 | v4l2_sd_cfg->has_external_strobe = true; | |
903 | } | |
904 | ||
905 | static const struct v4l2_flash_ops v4l2_flash_ops = { | |
906 | .external_strobe_set = max77693_led_external_strobe_set, | |
907 | }; | |
908 | #else | |
909 | static inline void max77693_init_v4l2_flash_config( | |
910 | struct max77693_sub_led *sub_led, | |
911 | struct max77693_led_config_data *led_cfg, | |
912 | struct v4l2_flash_config *v4l2_sd_cfg) | |
913 | { | |
914 | } | |
915 | static const struct v4l2_flash_ops v4l2_flash_ops; | |
916 | #endif | |
917 | ||
a43f6a86 JA |
918 | static void max77693_init_fled_cdev(struct max77693_sub_led *sub_led, |
919 | struct max77693_led_config_data *led_cfg) | |
920 | { | |
921 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
922 | int fled_id = sub_led->fled_id; | |
923 | struct led_classdev_flash *fled_cdev; | |
924 | struct led_classdev *led_cdev; | |
925 | ||
926 | /* Initialize LED Flash class device */ | |
927 | fled_cdev = &sub_led->fled_cdev; | |
928 | fled_cdev->ops = &flash_ops; | |
929 | led_cdev = &fled_cdev->led_cdev; | |
930 | ||
931 | led_cdev->name = led_cfg->label[fled_id]; | |
932 | ||
933 | led_cdev->brightness_set = max77693_led_brightness_set; | |
934 | led_cdev->brightness_set_sync = max77693_led_brightness_set_sync; | |
935 | led_cdev->max_brightness = (led->iout_joint ? | |
936 | led_cfg->iout_torch_max[FLED1] + | |
937 | led_cfg->iout_torch_max[FLED2] : | |
938 | led_cfg->iout_torch_max[fled_id]) / | |
939 | TORCH_IOUT_STEP; | |
940 | led_cdev->flags |= LED_DEV_CAP_FLASH; | |
941 | INIT_WORK(&sub_led->work_brightness_set, | |
942 | max77693_led_brightness_set_work); | |
943 | ||
944 | max77693_init_flash_settings(sub_led, led_cfg); | |
945 | ||
946 | /* Init flash timeout cache */ | |
947 | sub_led->flash_timeout = fled_cdev->timeout.val; | |
948 | } | |
949 | ||
0b380186 JA |
950 | static int max77693_register_led(struct max77693_sub_led *sub_led, |
951 | struct max77693_led_config_data *led_cfg, | |
952 | struct device_node *sub_node) | |
953 | { | |
954 | struct max77693_led_device *led = sub_led_to_led(sub_led); | |
955 | struct led_classdev_flash *fled_cdev = &sub_led->fled_cdev; | |
956 | struct device *dev = &led->pdev->dev; | |
957 | struct v4l2_flash_config v4l2_sd_cfg = {}; | |
958 | int ret; | |
959 | ||
960 | /* Register in the LED subsystem */ | |
961 | ret = led_classdev_flash_register(dev, fled_cdev); | |
962 | if (ret < 0) | |
963 | return ret; | |
964 | ||
965 | max77693_init_v4l2_flash_config(sub_led, led_cfg, &v4l2_sd_cfg); | |
966 | ||
967 | /* Register in the V4L2 subsystem. */ | |
968 | sub_led->v4l2_flash = v4l2_flash_init(dev, sub_node, fled_cdev, NULL, | |
969 | &v4l2_flash_ops, &v4l2_sd_cfg); | |
970 | if (IS_ERR(sub_led->v4l2_flash)) { | |
971 | ret = PTR_ERR(sub_led->v4l2_flash); | |
972 | goto err_v4l2_flash_init; | |
973 | } | |
974 | ||
975 | return 0; | |
976 | ||
977 | err_v4l2_flash_init: | |
978 | led_classdev_flash_unregister(fled_cdev); | |
979 | return ret; | |
980 | } | |
981 | ||
a43f6a86 JA |
982 | static int max77693_led_probe(struct platform_device *pdev) |
983 | { | |
984 | struct device *dev = &pdev->dev; | |
985 | struct max77693_dev *iodev = dev_get_drvdata(dev->parent); | |
986 | struct max77693_led_device *led; | |
987 | struct max77693_sub_led *sub_leds; | |
0b380186 | 988 | struct device_node *sub_nodes[2] = {}; |
a43f6a86 JA |
989 | struct max77693_led_config_data led_cfg = {}; |
990 | int init_fled_cdev[2], i, ret; | |
991 | ||
992 | led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); | |
993 | if (!led) | |
994 | return -ENOMEM; | |
995 | ||
996 | led->pdev = pdev; | |
997 | led->regmap = iodev->regmap; | |
998 | led->allowed_modes = MODE_FLASH_MASK; | |
999 | sub_leds = led->sub_leds; | |
1000 | ||
1001 | platform_set_drvdata(pdev, led); | |
0b380186 | 1002 | ret = max77693_led_get_configuration(led, &led_cfg, sub_nodes); |
a43f6a86 JA |
1003 | if (ret < 0) |
1004 | return ret; | |
1005 | ||
1006 | ret = max77693_setup(led, &led_cfg); | |
1007 | if (ret < 0) | |
1008 | return ret; | |
1009 | ||
1010 | mutex_init(&led->lock); | |
1011 | ||
1012 | init_fled_cdev[FLED1] = | |
1013 | led->iout_joint || max77693_fled_used(led, FLED1); | |
1014 | init_fled_cdev[FLED2] = | |
1015 | !led->iout_joint && max77693_fled_used(led, FLED2); | |
1016 | ||
1017 | for (i = FLED1; i <= FLED2; ++i) { | |
1018 | if (!init_fled_cdev[i]) | |
1019 | continue; | |
1020 | ||
1021 | /* Initialize LED Flash class device */ | |
1022 | max77693_init_fled_cdev(&sub_leds[i], &led_cfg); | |
1023 | ||
0b380186 JA |
1024 | /* |
1025 | * Register LED Flash class device and corresponding | |
1026 | * V4L2 Flash device. | |
1027 | */ | |
1028 | ret = max77693_register_led(&sub_leds[i], &led_cfg, | |
1029 | sub_nodes[i]); | |
a43f6a86 JA |
1030 | if (ret < 0) { |
1031 | /* | |
1032 | * At this moment FLED1 might have been already | |
1033 | * registered and it needs to be released. | |
1034 | */ | |
1035 | if (i == FLED2) | |
1036 | goto err_register_led2; | |
1037 | else | |
1038 | goto err_register_led1; | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | return 0; | |
1043 | ||
1044 | err_register_led2: | |
1045 | /* It is possible than only FLED2 was to be registered */ | |
1046 | if (!init_fled_cdev[FLED1]) | |
1047 | goto err_register_led1; | |
0b380186 | 1048 | v4l2_flash_release(sub_leds[FLED1].v4l2_flash); |
a43f6a86 JA |
1049 | led_classdev_flash_unregister(&sub_leds[FLED1].fled_cdev); |
1050 | err_register_led1: | |
1051 | mutex_destroy(&led->lock); | |
1052 | ||
1053 | return ret; | |
1054 | } | |
1055 | ||
1056 | static int max77693_led_remove(struct platform_device *pdev) | |
1057 | { | |
1058 | struct max77693_led_device *led = platform_get_drvdata(pdev); | |
1059 | struct max77693_sub_led *sub_leds = led->sub_leds; | |
1060 | ||
1061 | if (led->iout_joint || max77693_fled_used(led, FLED1)) { | |
0b380186 | 1062 | v4l2_flash_release(sub_leds[FLED1].v4l2_flash); |
a43f6a86 JA |
1063 | led_classdev_flash_unregister(&sub_leds[FLED1].fled_cdev); |
1064 | cancel_work_sync(&sub_leds[FLED1].work_brightness_set); | |
1065 | } | |
1066 | ||
1067 | if (!led->iout_joint && max77693_fled_used(led, FLED2)) { | |
0b380186 | 1068 | v4l2_flash_release(sub_leds[FLED2].v4l2_flash); |
a43f6a86 JA |
1069 | led_classdev_flash_unregister(&sub_leds[FLED2].fled_cdev); |
1070 | cancel_work_sync(&sub_leds[FLED2].work_brightness_set); | |
1071 | } | |
1072 | ||
1073 | mutex_destroy(&led->lock); | |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | static const struct of_device_id max77693_led_dt_match[] = { | |
1079 | { .compatible = "maxim,max77693-led" }, | |
1080 | {}, | |
1081 | }; | |
1082 | ||
1083 | static struct platform_driver max77693_led_driver = { | |
1084 | .probe = max77693_led_probe, | |
1085 | .remove = max77693_led_remove, | |
1086 | .driver = { | |
1087 | .name = "max77693-led", | |
1088 | .of_match_table = max77693_led_dt_match, | |
1089 | }, | |
1090 | }; | |
1091 | ||
1092 | module_platform_driver(max77693_led_driver); | |
1093 | ||
1094 | MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>"); | |
1095 | MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>"); | |
1096 | MODULE_DESCRIPTION("Maxim MAX77693 led flash driver"); | |
1097 | MODULE_LICENSE("GPL v2"); |