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
mt6323_led_hw_brightness(struct led_classdev * cdev,enum led_brightness brightness)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(regmap, ISINK_CON(regs->isink_con[2], led->id),
174 con2_mask, con2_val);
175 return ret;
176 }
177
mt6323_led_hw_off(struct led_classdev * cdev)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(regmap, regs->isink_en_ctrl,
189 ISINK_CH_EN_MASK(led->id), ~status);
190 if (ret < 0)
191 return ret;
192
193 usleep_range(100, 300);
194 ret = regmap_update_bits(regmap, 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
mt6323_get_led_hw_brightness(struct led_classdev * cdev)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(regmap, regs->top_ckpdn[2], &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(regmap, regs->isink_en_ctrl, &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(regmap, ISINK_CON(regs->isink_con[2], led->id), &status);
228 if (ret < 0)
229 return ret;
230
231 return ((status & ISINK_CH_STEP_MASK)
232 >> ISINK_CH_STEP_SHIFT) + 1;
233 }
234
mt6323_led_hw_on(struct led_classdev * cdev,enum led_brightness brightness)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(regmap, regs->top_ckcon[1],
251 RG_ISINK_CK_SEL_MASK(led->id), 0);
252 if (ret < 0)
253 return ret;
254
255 status = RG_ISINK_CK_PDN(led->id);
256 ret = regmap_update_bits(regmap, regs->top_ckpdn[2],
257 RG_ISINK_CK_PDN_MASK(led->id),
258 ~status);
259 if (ret < 0)
260 return ret;
261
262 usleep_range(100, 300);
263
264 ret = regmap_update_bits(regmap, 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(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(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
mt6323_led_set_blink(struct led_classdev * cdev,unsigned long * delay_on,unsigned long * delay_off)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, cdev->max_brightness);
339 if (ret < 0)
340 goto out;
341 led->current_brightness = cdev->max_brightness;
342 }
343
344 ret = regmap_update_bits(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(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(&leds->lock);
355
356 return ret;
357 }
358
mt6323_led_set_brightness(struct led_classdev * cdev,enum led_brightness brightness)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(&leds->lock);
385
386 return ret;
387 }
388
mtk_wled_hw_on(struct led_classdev * cdev)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(regmap, regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN);
398 if (ret)
399 return ret;
400
401 ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN);
402 if (ret)
403 return ret;
404
405 ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN);
406 if (ret)
407 return ret;
408
409 usleep_range(5000, 6000);
410
411 /* Enable WLED channel pair */
412 ret = regmap_set_bits(regmap, regs->iwled_en_ctrl, BIT(led->id));
413 if (ret)
414 return ret;
415
416 ret = regmap_set_bits(regmap, regs->iwled_en_ctrl, BIT(led->id + 1));
417 if (ret)
418 return ret;
419
420 return 0;
421 }
422
mtk_wled_hw_off(struct led_classdev * cdev)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(regmap, regs->iwled_en_ctrl, BIT(led->id + 1));
432 if (ret)
433 return ret;
434
435 ret = regmap_clear_bits(regmap, regs->iwled_en_ctrl, BIT(led->id));
436 if (ret)
437 return ret;
438
439 ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN);
440 if (ret)
441 return ret;
442
443 ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN);
444 if (ret)
445 return ret;
446
447 ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN);
448 if (ret)
449 return ret;
450
451 return 0;
452 }
453
mt6323_get_wled_brightness(struct led_classdev * cdev)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(regmap, regs->iwled_en_ctrl, &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
mt6323_wled_set_brightness(struct led_classdev * cdev,enum led_brightness brightness)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(&leds->lock);
496
497 return ret;
498 }
499
mt6323_led_set_dt_default(struct led_classdev * cdev,struct device_node * np)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, 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, LED_OFF);
521 }
522
523 return ret;
524 }
525
mt6323_led_probe(struct platform_device * pdev)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 mt6397_chip *hw = dev_get_drvdata(dev->parent);
531 struct mt6323_leds *leds;
532 struct mt6323_led *led;
533 const struct mt6323_regs *regs;
534 const struct mt6323_hwspec *spec;
535 int ret;
536 unsigned int status;
537 u32 reg;
538 u8 max_leds;
539
540 leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL);
541 if (!leds)
542 return -ENOMEM;
543
544 platform_set_drvdata(pdev, leds);
545 leds->dev = dev;
546 leds->pdata = device_get_match_data(dev);
547 regs = leds->pdata->regs;
548 spec = leds->pdata->spec;
549 max_leds = spec->max_leds + spec->max_wleds;
550
551 /*
552 * leds->hw points to the underlying bus for the register
553 * controlled.
554 */
555 leds->hw = hw;
556 mutex_init(&leds->lock);
557
558 status = RG_DRV_32K_CK_PDN;
559 ret = regmap_update_bits(leds->hw->regmap, regs->top_ckpdn[0],
560 RG_DRV_32K_CK_PDN_MASK, ~status);
561 if (ret < 0) {
562 dev_err(leds->dev,
563 "Failed to update TOP_CKPDN0 Register\n");
564 return ret;
565 }
566
567 for_each_available_child_of_node_scoped(np, child) {
568 struct led_init_data init_data = {};
569 bool is_wled;
570
571 ret = of_property_read_u32(child, "reg", ®);
572 if (ret) {
573 dev_err(dev, "Failed to read led 'reg' property\n");
574 return ret;
575 }
576
577 if (reg >= max_leds || reg >= MAX_SUPPORTED_LEDS ||
578 leds->led[reg]) {
579 dev_err(dev, "Invalid led reg %u\n", reg);
580 return -EINVAL;
581 }
582
583 led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL);
584 if (!led)
585 return -ENOMEM;
586
587 is_wled = of_property_read_bool(child, "mediatek,is-wled");
588
589 leds->led[reg] = led;
590 leds->led[reg]->id = reg;
591 leds->led[reg]->cdev.max_brightness = spec->max_brightness;
592
593 if (is_wled) {
594 leds->led[reg]->cdev.brightness_set_blocking =
595 mt6323_wled_set_brightness;
596 leds->led[reg]->cdev.brightness_get =
597 mt6323_get_wled_brightness;
598 } else {
599 leds->led[reg]->cdev.brightness_set_blocking =
600 mt6323_led_set_brightness;
601 leds->led[reg]->cdev.blink_set = mt6323_led_set_blink;
602 leds->led[reg]->cdev.brightness_get =
603 mt6323_get_led_hw_brightness;
604 }
605 leds->led[reg]->parent = leds;
606
607 ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child);
608 if (ret < 0) {
609 dev_err(leds->dev,
610 "Failed to LED set default from devicetree\n");
611 return ret;
612 }
613
614 init_data.fwnode = of_fwnode_handle(child);
615
616 ret = devm_led_classdev_register_ext(dev, &leds->led[reg]->cdev,
617 &init_data);
618 if (ret) {
619 dev_err(dev, "Failed to register LED: %d\n", ret);
620 return ret;
621 }
622 }
623
624 return 0;
625 }
626
mt6323_led_remove(struct platform_device * pdev)627 static void mt6323_led_remove(struct platform_device *pdev)
628 {
629 struct mt6323_leds *leds = platform_get_drvdata(pdev);
630 const struct mt6323_regs *regs = leds->pdata->regs;
631 int i;
632
633 /* Turn the LEDs off on driver removal. */
634 for (i = 0 ; leds->led[i] ; i++)
635 mt6323_led_hw_off(&leds->led[i]->cdev);
636
637 regmap_update_bits(leds->hw->regmap, regs->top_ckpdn[0],
638 RG_DRV_32K_CK_PDN_MASK,
639 RG_DRV_32K_CK_PDN);
640
641 mutex_destroy(&leds->lock);
642 }
643
644 static const struct mt6323_regs mt6323_registers = {
645 .top_ckpdn = (const u16[]){ 0x102, 0x106, 0x10e },
646 .num_top_ckpdn = 3,
647 .top_ckcon = (const u16[]){ 0x120, 0x126 },
648 .num_top_ckcon = 2,
649 .isink_con = (const u16[]){ 0x330, 0x332, 0x334 },
650 .num_isink_con = 3,
651 .isink_max_regs = 4, /* ISINK[0..3] */
652 .isink_en_ctrl = 0x356,
653 };
654
655 static const struct mt6323_regs mt6331_registers = {
656 .top_ckpdn = (const u16[]){ 0x138, 0x13e, 0x144 },
657 .num_top_ckpdn = 3,
658 .top_ckcon = (const u16[]){ 0x14c, 0x14a },
659 .num_top_ckcon = 2,
660 .isink_con = (const u16[]){ 0x40c, 0x40e, 0x410, 0x412, 0x414 },
661 .num_isink_con = 5,
662 .isink_max_regs = 4, /* ISINK[0..3] */
663 .isink_en_ctrl = 0x43a,
664 };
665
666 static const struct mt6323_regs mt6332_registers = {
667 .top_ckpdn = (const u16[]){ 0x8094, 0x809a, 0x80a0 },
668 .num_top_ckpdn = 3,
669 .top_ckcon = (const u16[]){ 0x80a6, 0x80ac },
670 .num_top_ckcon = 2,
671 .isink_con = (const u16[]){ 0x8cd4 },
672 .num_isink_con = 1,
673 .isink_max_regs = 12, /* IWLED[0..2, 3..9] */
674 .iwled_en_ctrl = 0x8cda,
675 };
676
677 static const struct mt6323_hwspec mt6323_spec = {
678 .max_period = 10000,
679 .max_leds = 4,
680 .max_brightness = 6,
681 .unit_duty = 3125,
682 };
683
684 static const struct mt6323_hwspec mt6332_spec = {
685 /* There are no LEDs in MT6332. Only WLEDs are present. */
686 .max_leds = 0,
687 .max_wleds = 1,
688 .max_brightness = 1024,
689 };
690
691 static const struct mt6323_data mt6323_pdata = {
692 .regs = &mt6323_registers,
693 .spec = &mt6323_spec,
694 };
695
696 static const struct mt6323_data mt6331_pdata = {
697 .regs = &mt6331_registers,
698 .spec = &mt6323_spec,
699 };
700
701 static const struct mt6323_data mt6332_pdata = {
702 .regs = &mt6332_registers,
703 .spec = &mt6332_spec,
704 };
705
706 static const struct of_device_id mt6323_led_dt_match[] = {
707 { .compatible = "mediatek,mt6323-led", .data = &mt6323_pdata},
708 { .compatible = "mediatek,mt6331-led", .data = &mt6331_pdata },
709 { .compatible = "mediatek,mt6332-led", .data = &mt6332_pdata },
710 {},
711 };
712 MODULE_DEVICE_TABLE(of, mt6323_led_dt_match);
713
714 static struct platform_driver mt6323_led_driver = {
715 .probe = mt6323_led_probe,
716 .remove = mt6323_led_remove,
717 .driver = {
718 .name = "mt6323-led",
719 .of_match_table = mt6323_led_dt_match,
720 },
721 };
722
723 module_platform_driver(mt6323_led_driver);
724
725 MODULE_DESCRIPTION("LED driver for Mediatek MT6323 PMIC");
726 MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
727 MODULE_LICENSE("GPL");
728