1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * LED driver for Mediatek MT6323 PMIC |
4 | * |
5 | * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com> |
6 | */ |
7 | #include <linux/kernel.h> |
8 | #include <linux/leds.h> |
9 | #include <linux/mfd/mt6323/registers.h> |
10 | #include <linux/mfd/mt6397/core.h> |
11 | #include <linux/module.h> |
12 | #include <linux/of.h> |
13 | #include <linux/platform_device.h> |
14 | #include <linux/regmap.h> |
15 | |
16 | /* |
17 | * Register field for TOP_CKPDN0 to enable |
18 | * 32K clock common for LED device. |
19 | */ |
20 | #define RG_DRV_32K_CK_PDN BIT(11) |
21 | #define RG_DRV_32K_CK_PDN_MASK BIT(11) |
22 | |
23 | /* 32K/1M/6M clock common for WLED device */ |
24 | #define RG_VWLED_1M_CK_PDN BIT(0) |
25 | #define RG_VWLED_32K_CK_PDN BIT(12) |
26 | #define RG_VWLED_6M_CK_PDN BIT(13) |
27 | |
28 | /* |
29 | * Register field for TOP_CKPDN2 to enable |
30 | * individual clock for LED device. |
31 | */ |
32 | #define RG_ISINK_CK_PDN(i) BIT(i) |
33 | #define RG_ISINK_CK_PDN_MASK(i) BIT(i) |
34 | |
35 | /* |
36 | * Register field for TOP_CKCON1 to select |
37 | * clock source. |
38 | */ |
39 | #define RG_ISINK_CK_SEL_MASK(i) (BIT(10) << (i)) |
40 | |
41 | #define ISINK_CON(r, i) (r + 0x8 * (i)) |
42 | |
43 | /* ISINK_CON0: Register to setup the duty cycle of the blink. */ |
44 | #define ISINK_DIM_DUTY_MASK (0x1f << 8) |
45 | #define ISINK_DIM_DUTY(i) (((i) << 8) & ISINK_DIM_DUTY_MASK) |
46 | |
47 | /* ISINK_CON1: Register to setup the period of the blink. */ |
48 | #define ISINK_DIM_FSEL_MASK (0xffff) |
49 | #define ISINK_DIM_FSEL(i) ((i) & ISINK_DIM_FSEL_MASK) |
50 | |
51 | /* ISINK_CON2: Register to control the brightness. */ |
52 | #define ISINK_CH_STEP_SHIFT 12 |
53 | #define ISINK_CH_STEP_MASK (0x7 << 12) |
54 | #define ISINK_CH_STEP(i) (((i) << 12) & ISINK_CH_STEP_MASK) |
55 | #define ISINK_SFSTR0_TC_MASK (0x3 << 1) |
56 | #define ISINK_SFSTR0_TC(i) (((i) << 1) & ISINK_SFSTR0_TC_MASK) |
57 | #define ISINK_SFSTR0_EN_MASK BIT(0) |
58 | #define ISINK_SFSTR0_EN BIT(0) |
59 | |
60 | /* Register to LED channel enablement. */ |
61 | #define ISINK_CH_EN_MASK(i) BIT(i) |
62 | #define ISINK_CH_EN(i) BIT(i) |
63 | |
64 | #define MAX_SUPPORTED_LEDS 8 |
65 | |
66 | struct mt6323_leds; |
67 | |
68 | /** |
69 | * struct mt6323_led - state container for the LED device |
70 | * @id: the identifier in MT6323 LED device |
71 | * @parent: the pointer to MT6323 LED controller |
72 | * @cdev: LED class device for this LED device |
73 | * @current_brightness: current state of the LED device |
74 | */ |
75 | struct mt6323_led { |
76 | int id; |
77 | struct mt6323_leds *parent; |
78 | struct led_classdev cdev; |
79 | enum led_brightness current_brightness; |
80 | }; |
81 | |
82 | /** |
83 | * struct mt6323_regs - register spec for the LED device |
84 | * @top_ckpdn: Offset to ISINK_CKPDN[0..x] registers |
85 | * @num_top_ckpdn: Number of ISINK_CKPDN registers |
86 | * @top_ckcon: Offset to ISINK_CKCON[0..x] registers |
87 | * @num_top_ckcon: Number of ISINK_CKCON registers |
88 | * @isink_con: Offset to ISINKx_CON[0..x] registers |
89 | * @num_isink_con: Number of ISINKx_CON registers |
90 | * @isink_max_regs: Number of ISINK[0..x] registers |
91 | * @isink_en_ctrl: Offset to ISINK_EN_CTRL register |
92 | * @iwled_en_ctrl: Offset to IWLED_EN_CTRL register |
93 | */ |
94 | struct mt6323_regs { |
95 | const u16 *top_ckpdn; |
96 | u8 num_top_ckpdn; |
97 | const u16 *top_ckcon; |
98 | u8 num_top_ckcon; |
99 | const u16 *isink_con; |
100 | u8 num_isink_con; |
101 | u8 isink_max_regs; |
102 | u16 isink_en_ctrl; |
103 | u16 iwled_en_ctrl; |
104 | }; |
105 | |
106 | /** |
107 | * struct mt6323_hwspec - hardware specific parameters |
108 | * @max_period: Maximum period for all LEDs |
109 | * @max_leds: Maximum number of supported LEDs |
110 | * @max_wleds: Maximum number of WLEDs |
111 | * @max_brightness: Maximum brightness for all LEDs |
112 | * @unit_duty: Steps of duty per period |
113 | */ |
114 | struct mt6323_hwspec { |
115 | u16 max_period; |
116 | u8 max_leds; |
117 | u8 max_wleds; |
118 | u16 max_brightness; |
119 | u16 unit_duty; |
120 | }; |
121 | |
122 | /** |
123 | * struct mt6323_data - device specific data |
124 | * @regs: Register spec for this device |
125 | * @spec: Hardware specific parameters |
126 | */ |
127 | struct mt6323_data { |
128 | const struct mt6323_regs *regs; |
129 | const struct mt6323_hwspec *spec; |
130 | }; |
131 | |
132 | /** |
133 | * struct mt6323_leds - state container for holding LED controller |
134 | * of the driver |
135 | * @dev: the device pointer |
136 | * @hw: the underlying hardware providing shared |
137 | * bus for the register operations |
138 | * @pdata: device specific data |
139 | * @lock: the lock among process context |
140 | * @led: the array that contains the state of individual |
141 | * LED device |
142 | */ |
143 | struct mt6323_leds { |
144 | struct device *dev; |
145 | struct mt6397_chip *hw; |
146 | const struct mt6323_data *pdata; |
147 | /* protect among process context */ |
148 | struct mutex lock; |
149 | struct mt6323_led *led[MAX_SUPPORTED_LEDS]; |
150 | }; |
151 | |
152 | static int mt6323_led_hw_brightness(struct led_classdev *cdev, |
153 | enum led_brightness brightness) |
154 | { |
155 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
156 | struct mt6323_leds *leds = led->parent; |
157 | const struct mt6323_regs *regs = leds->pdata->regs; |
158 | struct regmap *regmap = leds->hw->regmap; |
159 | u32 con2_mask = 0, con2_val = 0; |
160 | int ret; |
161 | |
162 | /* |
163 | * Setup current output for the corresponding |
164 | * brightness level. |
165 | */ |
166 | con2_mask |= ISINK_CH_STEP_MASK | |
167 | ISINK_SFSTR0_TC_MASK | |
168 | ISINK_SFSTR0_EN_MASK; |
169 | con2_val |= ISINK_CH_STEP(brightness - 1) | |
170 | ISINK_SFSTR0_TC(2) | |
171 | ISINK_SFSTR0_EN; |
172 | |
173 | ret = regmap_update_bits(map: regmap, ISINK_CON(regs->isink_con[2], led->id), |
174 | mask: con2_mask, val: con2_val); |
175 | return ret; |
176 | } |
177 | |
178 | static int mt6323_led_hw_off(struct led_classdev *cdev) |
179 | { |
180 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
181 | struct mt6323_leds *leds = led->parent; |
182 | const struct mt6323_regs *regs = leds->pdata->regs; |
183 | struct regmap *regmap = leds->hw->regmap; |
184 | unsigned int status; |
185 | int ret; |
186 | |
187 | status = ISINK_CH_EN(led->id); |
188 | ret = regmap_update_bits(map: regmap, reg: regs->isink_en_ctrl, |
189 | ISINK_CH_EN_MASK(led->id), val: ~status); |
190 | if (ret < 0) |
191 | return ret; |
192 | |
193 | usleep_range(min: 100, max: 300); |
194 | ret = regmap_update_bits(map: regmap, reg: regs->top_ckpdn[2], |
195 | RG_ISINK_CK_PDN_MASK(led->id), |
196 | RG_ISINK_CK_PDN(led->id)); |
197 | if (ret < 0) |
198 | return ret; |
199 | |
200 | return 0; |
201 | } |
202 | |
203 | static enum led_brightness |
204 | mt6323_get_led_hw_brightness(struct led_classdev *cdev) |
205 | { |
206 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
207 | struct mt6323_leds *leds = led->parent; |
208 | const struct mt6323_regs *regs = leds->pdata->regs; |
209 | struct regmap *regmap = leds->hw->regmap; |
210 | unsigned int status; |
211 | int ret; |
212 | |
213 | ret = regmap_read(map: regmap, reg: regs->top_ckpdn[2], val: &status); |
214 | if (ret < 0) |
215 | return ret; |
216 | |
217 | if (status & RG_ISINK_CK_PDN_MASK(led->id)) |
218 | return 0; |
219 | |
220 | ret = regmap_read(map: regmap, reg: regs->isink_en_ctrl, val: &status); |
221 | if (ret < 0) |
222 | return ret; |
223 | |
224 | if (!(status & ISINK_CH_EN(led->id))) |
225 | return 0; |
226 | |
227 | ret = regmap_read(map: regmap, ISINK_CON(regs->isink_con[2], led->id), val: &status); |
228 | if (ret < 0) |
229 | return ret; |
230 | |
231 | return ((status & ISINK_CH_STEP_MASK) |
232 | >> ISINK_CH_STEP_SHIFT) + 1; |
233 | } |
234 | |
235 | static int mt6323_led_hw_on(struct led_classdev *cdev, |
236 | enum led_brightness brightness) |
237 | { |
238 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
239 | struct mt6323_leds *leds = led->parent; |
240 | const struct mt6323_regs *regs = leds->pdata->regs; |
241 | struct regmap *regmap = leds->hw->regmap; |
242 | unsigned int status; |
243 | int ret; |
244 | |
245 | /* |
246 | * Setup required clock source, enable the corresponding |
247 | * clock and channel and let work with continuous blink as |
248 | * the default. |
249 | */ |
250 | ret = regmap_update_bits(map: regmap, reg: regs->top_ckcon[1], |
251 | RG_ISINK_CK_SEL_MASK(led->id), val: 0); |
252 | if (ret < 0) |
253 | return ret; |
254 | |
255 | status = RG_ISINK_CK_PDN(led->id); |
256 | ret = regmap_update_bits(map: regmap, reg: regs->top_ckpdn[2], |
257 | RG_ISINK_CK_PDN_MASK(led->id), |
258 | val: ~status); |
259 | if (ret < 0) |
260 | return ret; |
261 | |
262 | usleep_range(min: 100, max: 300); |
263 | |
264 | ret = regmap_update_bits(map: regmap, reg: regs->isink_en_ctrl, |
265 | ISINK_CH_EN_MASK(led->id), |
266 | ISINK_CH_EN(led->id)); |
267 | if (ret < 0) |
268 | return ret; |
269 | |
270 | ret = mt6323_led_hw_brightness(cdev, brightness); |
271 | if (ret < 0) |
272 | return ret; |
273 | |
274 | ret = regmap_update_bits(map: regmap, ISINK_CON(regs->isink_con[0], led->id), |
275 | ISINK_DIM_DUTY_MASK, |
276 | ISINK_DIM_DUTY(31)); |
277 | if (ret < 0) |
278 | return ret; |
279 | |
280 | ret = regmap_update_bits(map: regmap, ISINK_CON(regs->isink_con[1], led->id), |
281 | ISINK_DIM_FSEL_MASK, |
282 | ISINK_DIM_FSEL(1000)); |
283 | if (ret < 0) |
284 | return ret; |
285 | |
286 | return 0; |
287 | } |
288 | |
289 | static int mt6323_led_set_blink(struct led_classdev *cdev, |
290 | unsigned long *delay_on, |
291 | unsigned long *delay_off) |
292 | { |
293 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
294 | struct mt6323_leds *leds = led->parent; |
295 | const struct mt6323_regs *regs = leds->pdata->regs; |
296 | const struct mt6323_hwspec *spec = leds->pdata->spec; |
297 | struct regmap *regmap = leds->hw->regmap; |
298 | unsigned long period; |
299 | u8 duty_hw; |
300 | int ret; |
301 | |
302 | /* |
303 | * LED subsystem requires a default user |
304 | * friendly blink pattern for the LED so using |
305 | * 1Hz duty cycle 50% here if without specific |
306 | * value delay_on and delay off being assigned. |
307 | */ |
308 | if (!*delay_on && !*delay_off) { |
309 | *delay_on = 500; |
310 | *delay_off = 500; |
311 | } |
312 | |
313 | /* |
314 | * Units are in ms, if over the hardware able |
315 | * to support, fallback into software blink |
316 | */ |
317 | period = *delay_on + *delay_off; |
318 | |
319 | if (period > spec->max_period) |
320 | return -EINVAL; |
321 | |
322 | /* |
323 | * Calculate duty_hw based on the percentage of period during |
324 | * which the led is ON. |
325 | */ |
326 | duty_hw = DIV_ROUND_CLOSEST(*delay_on * 100000ul, period * spec->unit_duty); |
327 | |
328 | /* hardware doesn't support zero duty cycle. */ |
329 | if (!duty_hw) |
330 | return -EINVAL; |
331 | |
332 | mutex_lock(&leds->lock); |
333 | /* |
334 | * Set max_brightness as the software blink behavior |
335 | * when no blink brightness. |
336 | */ |
337 | if (!led->current_brightness) { |
338 | ret = mt6323_led_hw_on(cdev, brightness: cdev->max_brightness); |
339 | if (ret < 0) |
340 | goto out; |
341 | led->current_brightness = cdev->max_brightness; |
342 | } |
343 | |
344 | ret = regmap_update_bits(map: regmap, ISINK_CON(regs->isink_con[0], led->id), |
345 | ISINK_DIM_DUTY_MASK, |
346 | ISINK_DIM_DUTY(duty_hw - 1)); |
347 | if (ret < 0) |
348 | goto out; |
349 | |
350 | ret = regmap_update_bits(map: regmap, ISINK_CON(regs->isink_con[1], led->id), |
351 | ISINK_DIM_FSEL_MASK, |
352 | ISINK_DIM_FSEL(period - 1)); |
353 | out: |
354 | mutex_unlock(lock: &leds->lock); |
355 | |
356 | return ret; |
357 | } |
358 | |
359 | static int mt6323_led_set_brightness(struct led_classdev *cdev, |
360 | enum led_brightness brightness) |
361 | { |
362 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
363 | struct mt6323_leds *leds = led->parent; |
364 | int ret; |
365 | |
366 | mutex_lock(&leds->lock); |
367 | |
368 | if (!led->current_brightness && brightness) { |
369 | ret = mt6323_led_hw_on(cdev, brightness); |
370 | if (ret < 0) |
371 | goto out; |
372 | } else if (brightness) { |
373 | ret = mt6323_led_hw_brightness(cdev, brightness); |
374 | if (ret < 0) |
375 | goto out; |
376 | } else { |
377 | ret = mt6323_led_hw_off(cdev); |
378 | if (ret < 0) |
379 | goto out; |
380 | } |
381 | |
382 | led->current_brightness = brightness; |
383 | out: |
384 | mutex_unlock(lock: &leds->lock); |
385 | |
386 | return ret; |
387 | } |
388 | |
389 | static int mtk_wled_hw_on(struct led_classdev *cdev) |
390 | { |
391 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
392 | struct mt6323_leds *leds = led->parent; |
393 | const struct mt6323_regs *regs = leds->pdata->regs; |
394 | struct regmap *regmap = leds->hw->regmap; |
395 | int ret; |
396 | |
397 | ret = regmap_clear_bits(map: regmap, reg: regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN); |
398 | if (ret) |
399 | return ret; |
400 | |
401 | ret = regmap_clear_bits(map: regmap, reg: regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN); |
402 | if (ret) |
403 | return ret; |
404 | |
405 | ret = regmap_clear_bits(map: regmap, reg: regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN); |
406 | if (ret) |
407 | return ret; |
408 | |
409 | usleep_range(min: 5000, max: 6000); |
410 | |
411 | /* Enable WLED channel pair */ |
412 | ret = regmap_set_bits(map: regmap, reg: regs->iwled_en_ctrl, BIT(led->id)); |
413 | if (ret) |
414 | return ret; |
415 | |
416 | ret = regmap_set_bits(map: regmap, reg: regs->iwled_en_ctrl, BIT(led->id + 1)); |
417 | if (ret) |
418 | return ret; |
419 | |
420 | return 0; |
421 | } |
422 | |
423 | static int mtk_wled_hw_off(struct led_classdev *cdev) |
424 | { |
425 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
426 | struct mt6323_leds *leds = led->parent; |
427 | const struct mt6323_regs *regs = leds->pdata->regs; |
428 | struct regmap *regmap = leds->hw->regmap; |
429 | int ret; |
430 | |
431 | ret = regmap_clear_bits(map: regmap, reg: regs->iwled_en_ctrl, BIT(led->id + 1)); |
432 | if (ret) |
433 | return ret; |
434 | |
435 | ret = regmap_clear_bits(map: regmap, reg: regs->iwled_en_ctrl, BIT(led->id)); |
436 | if (ret) |
437 | return ret; |
438 | |
439 | ret = regmap_set_bits(map: regmap, reg: regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN); |
440 | if (ret) |
441 | return ret; |
442 | |
443 | ret = regmap_set_bits(map: regmap, reg: regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN); |
444 | if (ret) |
445 | return ret; |
446 | |
447 | ret = regmap_set_bits(map: regmap, reg: regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN); |
448 | if (ret) |
449 | return ret; |
450 | |
451 | return 0; |
452 | } |
453 | |
454 | static enum led_brightness mt6323_get_wled_brightness(struct led_classdev *cdev) |
455 | { |
456 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
457 | struct mt6323_leds *leds = led->parent; |
458 | const struct mt6323_regs *regs = leds->pdata->regs; |
459 | struct regmap *regmap = leds->hw->regmap; |
460 | unsigned int status; |
461 | int ret; |
462 | |
463 | ret = regmap_read(map: regmap, reg: regs->iwled_en_ctrl, val: &status); |
464 | if (ret) |
465 | return 0; |
466 | |
467 | /* Always two channels per WLED */ |
468 | status &= BIT(led->id) | BIT(led->id + 1); |
469 | |
470 | return status ? led->current_brightness : 0; |
471 | } |
472 | |
473 | static int mt6323_wled_set_brightness(struct led_classdev *cdev, |
474 | enum led_brightness brightness) |
475 | { |
476 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
477 | struct mt6323_leds *leds = led->parent; |
478 | int ret = 0; |
479 | |
480 | mutex_lock(&leds->lock); |
481 | |
482 | if (brightness) { |
483 | if (!led->current_brightness) |
484 | ret = mtk_wled_hw_on(cdev); |
485 | if (ret) |
486 | goto out; |
487 | } else { |
488 | ret = mtk_wled_hw_off(cdev); |
489 | if (ret) |
490 | goto out; |
491 | } |
492 | |
493 | led->current_brightness = brightness; |
494 | out: |
495 | mutex_unlock(lock: &leds->lock); |
496 | |
497 | return ret; |
498 | } |
499 | |
500 | static int mt6323_led_set_dt_default(struct led_classdev *cdev, |
501 | struct device_node *np) |
502 | { |
503 | struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); |
504 | enum led_default_state state; |
505 | int ret = 0; |
506 | |
507 | state = led_init_default_state_get(of_fwnode_handle(np)); |
508 | switch (state) { |
509 | case LEDS_DEFSTATE_ON: |
510 | ret = mt6323_led_set_brightness(cdev, brightness: cdev->max_brightness); |
511 | break; |
512 | case LEDS_DEFSTATE_KEEP: |
513 | ret = mt6323_get_led_hw_brightness(cdev); |
514 | if (ret < 0) |
515 | return ret; |
516 | led->current_brightness = ret; |
517 | ret = 0; |
518 | break; |
519 | default: |
520 | ret = mt6323_led_set_brightness(cdev, brightness: LED_OFF); |
521 | } |
522 | |
523 | return ret; |
524 | } |
525 | |
526 | static int mt6323_led_probe(struct platform_device *pdev) |
527 | { |
528 | struct device *dev = &pdev->dev; |
529 | struct device_node *np = dev_of_node(dev); |
530 | struct device_node *child; |
531 | struct mt6397_chip *hw = dev_get_drvdata(dev: dev->parent); |
532 | struct mt6323_leds *leds; |
533 | struct mt6323_led *led; |
534 | const struct mt6323_regs *regs; |
535 | const struct mt6323_hwspec *spec; |
536 | int ret; |
537 | unsigned int status; |
538 | u32 reg; |
539 | u8 max_leds; |
540 | |
541 | leds = devm_kzalloc(dev, size: sizeof(*leds), GFP_KERNEL); |
542 | if (!leds) |
543 | return -ENOMEM; |
544 | |
545 | platform_set_drvdata(pdev, data: leds); |
546 | leds->dev = dev; |
547 | leds->pdata = device_get_match_data(dev); |
548 | regs = leds->pdata->regs; |
549 | spec = leds->pdata->spec; |
550 | max_leds = spec->max_leds + spec->max_wleds; |
551 | |
552 | /* |
553 | * leds->hw points to the underlying bus for the register |
554 | * controlled. |
555 | */ |
556 | leds->hw = hw; |
557 | mutex_init(&leds->lock); |
558 | |
559 | status = RG_DRV_32K_CK_PDN; |
560 | ret = regmap_update_bits(map: leds->hw->regmap, reg: regs->top_ckpdn[0], |
561 | RG_DRV_32K_CK_PDN_MASK, val: ~status); |
562 | if (ret < 0) { |
563 | dev_err(leds->dev, |
564 | "Failed to update TOP_CKPDN0 Register\n" ); |
565 | return ret; |
566 | } |
567 | |
568 | for_each_available_child_of_node(np, child) { |
569 | struct led_init_data init_data = {}; |
570 | bool is_wled; |
571 | |
572 | ret = of_property_read_u32(np: child, propname: "reg" , out_value: ®); |
573 | if (ret) { |
574 | dev_err(dev, "Failed to read led 'reg' property\n" ); |
575 | goto put_child_node; |
576 | } |
577 | |
578 | if (reg >= max_leds || reg >= MAX_SUPPORTED_LEDS || |
579 | leds->led[reg]) { |
580 | dev_err(dev, "Invalid led reg %u\n" , reg); |
581 | ret = -EINVAL; |
582 | goto put_child_node; |
583 | } |
584 | |
585 | led = devm_kzalloc(dev, size: sizeof(*led), GFP_KERNEL); |
586 | if (!led) { |
587 | ret = -ENOMEM; |
588 | goto put_child_node; |
589 | } |
590 | |
591 | is_wled = of_property_read_bool(np: child, propname: "mediatek,is-wled" ); |
592 | |
593 | leds->led[reg] = led; |
594 | leds->led[reg]->id = reg; |
595 | leds->led[reg]->cdev.max_brightness = spec->max_brightness; |
596 | |
597 | if (is_wled) { |
598 | leds->led[reg]->cdev.brightness_set_blocking = |
599 | mt6323_wled_set_brightness; |
600 | leds->led[reg]->cdev.brightness_get = |
601 | mt6323_get_wled_brightness; |
602 | } else { |
603 | leds->led[reg]->cdev.brightness_set_blocking = |
604 | mt6323_led_set_brightness; |
605 | leds->led[reg]->cdev.blink_set = mt6323_led_set_blink; |
606 | leds->led[reg]->cdev.brightness_get = |
607 | mt6323_get_led_hw_brightness; |
608 | } |
609 | leds->led[reg]->parent = leds; |
610 | |
611 | ret = mt6323_led_set_dt_default(cdev: &leds->led[reg]->cdev, np: child); |
612 | if (ret < 0) { |
613 | dev_err(leds->dev, |
614 | "Failed to LED set default from devicetree\n" ); |
615 | goto put_child_node; |
616 | } |
617 | |
618 | init_data.fwnode = of_fwnode_handle(child); |
619 | |
620 | ret = devm_led_classdev_register_ext(parent: dev, led_cdev: &leds->led[reg]->cdev, |
621 | init_data: &init_data); |
622 | if (ret) { |
623 | dev_err(dev, "Failed to register LED: %d\n" , ret); |
624 | goto put_child_node; |
625 | } |
626 | } |
627 | |
628 | return 0; |
629 | |
630 | put_child_node: |
631 | of_node_put(node: child); |
632 | return ret; |
633 | } |
634 | |
635 | static void mt6323_led_remove(struct platform_device *pdev) |
636 | { |
637 | struct mt6323_leds *leds = platform_get_drvdata(pdev); |
638 | const struct mt6323_regs *regs = leds->pdata->regs; |
639 | int i; |
640 | |
641 | /* Turn the LEDs off on driver removal. */ |
642 | for (i = 0 ; leds->led[i] ; i++) |
643 | mt6323_led_hw_off(cdev: &leds->led[i]->cdev); |
644 | |
645 | regmap_update_bits(map: leds->hw->regmap, reg: regs->top_ckpdn[0], |
646 | RG_DRV_32K_CK_PDN_MASK, |
647 | RG_DRV_32K_CK_PDN); |
648 | |
649 | mutex_destroy(lock: &leds->lock); |
650 | } |
651 | |
652 | static const struct mt6323_regs mt6323_registers = { |
653 | .top_ckpdn = (const u16[]){ 0x102, 0x106, 0x10e }, |
654 | .num_top_ckpdn = 3, |
655 | .top_ckcon = (const u16[]){ 0x120, 0x126 }, |
656 | .num_top_ckcon = 2, |
657 | .isink_con = (const u16[]){ 0x330, 0x332, 0x334 }, |
658 | .num_isink_con = 3, |
659 | .isink_max_regs = 4, /* ISINK[0..3] */ |
660 | .isink_en_ctrl = 0x356, |
661 | }; |
662 | |
663 | static const struct mt6323_regs mt6331_registers = { |
664 | .top_ckpdn = (const u16[]){ 0x138, 0x13e, 0x144 }, |
665 | .num_top_ckpdn = 3, |
666 | .top_ckcon = (const u16[]){ 0x14c, 0x14a }, |
667 | .num_top_ckcon = 2, |
668 | .isink_con = (const u16[]){ 0x40c, 0x40e, 0x410, 0x412, 0x414 }, |
669 | .num_isink_con = 5, |
670 | .isink_max_regs = 4, /* ISINK[0..3] */ |
671 | .isink_en_ctrl = 0x43a, |
672 | }; |
673 | |
674 | static const struct mt6323_regs mt6332_registers = { |
675 | .top_ckpdn = (const u16[]){ 0x8094, 0x809a, 0x80a0 }, |
676 | .num_top_ckpdn = 3, |
677 | .top_ckcon = (const u16[]){ 0x80a6, 0x80ac }, |
678 | .num_top_ckcon = 2, |
679 | .isink_con = (const u16[]){ 0x8cd4 }, |
680 | .num_isink_con = 1, |
681 | .isink_max_regs = 12, /* IWLED[0..2, 3..9] */ |
682 | .iwled_en_ctrl = 0x8cda, |
683 | }; |
684 | |
685 | static const struct mt6323_hwspec mt6323_spec = { |
686 | .max_period = 10000, |
687 | .max_leds = 4, |
688 | .max_brightness = 6, |
689 | .unit_duty = 3125, |
690 | }; |
691 | |
692 | static const struct mt6323_hwspec mt6332_spec = { |
693 | /* There are no LEDs in MT6332. Only WLEDs are present. */ |
694 | .max_leds = 0, |
695 | .max_wleds = 1, |
696 | .max_brightness = 1024, |
697 | }; |
698 | |
699 | static const struct mt6323_data mt6323_pdata = { |
700 | .regs = &mt6323_registers, |
701 | .spec = &mt6323_spec, |
702 | }; |
703 | |
704 | static const struct mt6323_data mt6331_pdata = { |
705 | .regs = &mt6331_registers, |
706 | .spec = &mt6323_spec, |
707 | }; |
708 | |
709 | static const struct mt6323_data mt6332_pdata = { |
710 | .regs = &mt6332_registers, |
711 | .spec = &mt6332_spec, |
712 | }; |
713 | |
714 | static const struct of_device_id mt6323_led_dt_match[] = { |
715 | { .compatible = "mediatek,mt6323-led" , .data = &mt6323_pdata}, |
716 | { .compatible = "mediatek,mt6331-led" , .data = &mt6331_pdata }, |
717 | { .compatible = "mediatek,mt6332-led" , .data = &mt6332_pdata }, |
718 | {}, |
719 | }; |
720 | MODULE_DEVICE_TABLE(of, mt6323_led_dt_match); |
721 | |
722 | static struct platform_driver mt6323_led_driver = { |
723 | .probe = mt6323_led_probe, |
724 | .remove_new = mt6323_led_remove, |
725 | .driver = { |
726 | .name = "mt6323-led" , |
727 | .of_match_table = mt6323_led_dt_match, |
728 | }, |
729 | }; |
730 | |
731 | module_platform_driver(mt6323_led_driver); |
732 | |
733 | MODULE_DESCRIPTION("LED driver for Mediatek MT6323 PMIC" ); |
734 | MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>" ); |
735 | MODULE_LICENSE("GPL" ); |
736 | |