1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2023 Richtek Technology Corp.
6 * ChiYuan Huang <cy_huang@richtek.com>
7 * Alice Chen <alice_chen@richtek.com>
10 #include <linux/bitfield.h>
11 #include <linux/bitops.h>
12 #include <linux/kernel.h>
13 #include <linux/leds.h>
14 #include <linux/led-class-multicolor.h>
15 #include <linux/linear_range.h>
16 #include <linux/mod_devicetable.h>
17 #include <linux/module.h>
18 #include <linux/mutex.h>
19 #include <linux/platform_device.h>
20 #include <linux/property.h>
21 #include <linux/regmap.h>
22 #include <linux/util_macros.h>
24 #include <asm/unaligned.h>
34 enum mt6370_led_mode {
35 MT6370_LED_PWM_MODE = 0,
36 MT6370_LED_BREATH_MODE,
41 enum mt6370_led_field {
63 enum mt6370_led_ranges {
81 #define MT6370_REG_DEV_INFO 0x100
82 #define MT6370_REG_RGB1_DIM 0x182
83 #define MT6370_REG_RGB2_DIM 0x183
84 #define MT6370_REG_RGB3_DIM 0x184
85 #define MT6370_REG_RGB_EN 0x185
86 #define MT6370_REG_RGB1_ISNK 0x186
87 #define MT6370_REG_RGB2_ISNK 0x187
88 #define MT6370_REG_RGB3_ISNK 0x188
89 #define MT6370_REG_RGB1_TR 0x189
90 #define MT6370_REG_RGB_CHRIND_DIM 0x192
91 #define MT6370_REG_RGB_CHRIND_CTRL 0x193
92 #define MT6370_REG_RGB_CHRIND_TR 0x194
94 #define MT6372_REG_RGB_EN 0x182
95 #define MT6372_REG_RGB1_ISNK 0x183
96 #define MT6372_REG_RGB2_ISNK 0x184
97 #define MT6372_REG_RGB3_ISNK 0x185
98 #define MT6372_REG_RGB4_ISNK 0x186
99 #define MT6372_REG_RGB1_DIM 0x187
100 #define MT6372_REG_RGB2_DIM 0x188
101 #define MT6372_REG_RGB3_DIM 0x189
102 #define MT6372_REG_RGB4_DIM 0x18A
103 #define MT6372_REG_RGB12_FREQ 0x18B
104 #define MT6372_REG_RGB34_FREQ 0x18C
105 #define MT6372_REG_RGB1_TR 0x18D
107 #define MT6370_VENDOR_ID_MASK GENMASK(7, 4)
108 #define MT6372_VENDOR_ID 0x9
109 #define MT6372C_VENDOR_ID 0xb
110 #define MT6370_CHEN_BIT(id) BIT(MT6370_LED_ISNK4 - id)
111 #define MT6370_VIRTUAL_MULTICOLOR 5
112 #define MC_CHANNEL_NUM 3
113 #define MT6370_PWM_DUTY (BIT(5) - 1)
114 #define MT6372_PWM_DUTY (BIT(8) - 1)
118 * If the color of the LED in DT is set to
119 * - 'LED_COLOR_ID_RGB'
120 * - 'LED_COLOR_ID_MULTI'
121 * The member 'index' of this struct will be set to
122 * 'MT6370_VIRTUAL_MULTICOLOR'.
123 * If so, this LED will choose 'struct led_classdev_mc mc' to use.
124 * Instead, if the member 'index' of this struct is set to
125 * 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
126 * 'struct led_classdev isink' to use.
129 struct led_classdev isink;
130 struct led_classdev_mc mc;
132 struct mt6370_priv *priv;
133 enum led_default_state default_state;
137 struct mt6370_pdata {
138 const unsigned int *tfreq;
139 unsigned int tfreq_len;
141 s16 reg_rgb_chrind_tr;
146 /* Per LED access lock */
148 struct regmap *regmap;
149 struct regmap_field *fields[F_MAX_FIELDS];
150 const struct reg_field *reg_fields;
151 const struct linear_range *ranges;
152 struct reg_cfg *reg_cfgs;
153 const struct mt6370_pdata *pdata;
154 unsigned int leds_count;
155 unsigned int leds_active;
156 struct mt6370_led leds[] __counted_by(leds_count);
159 static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
160 [F_RGB_EN] = REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
161 [F_CHGIND_EN] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
162 [F_LED1_CURR] = REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
163 [F_LED2_CURR] = REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
164 [F_LED3_CURR] = REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
165 [F_LED4_CURR] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
166 [F_LED1_MODE] = REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
167 [F_LED2_MODE] = REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
168 [F_LED3_MODE] = REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
169 [F_LED4_MODE] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
170 [F_LED1_DUTY] = REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
171 [F_LED2_DUTY] = REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
172 [F_LED3_DUTY] = REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
173 [F_LED4_DUTY] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
174 [F_LED1_FREQ] = REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
175 [F_LED2_FREQ] = REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
176 [F_LED3_FREQ] = REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
177 [F_LED4_FREQ] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
180 static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
181 [F_RGB_EN] = REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
182 [F_CHGIND_EN] = REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
183 [F_LED1_CURR] = REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
184 [F_LED2_CURR] = REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
185 [F_LED3_CURR] = REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
186 [F_LED4_CURR] = REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
187 [F_LED1_MODE] = REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
188 [F_LED2_MODE] = REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
189 [F_LED3_MODE] = REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
190 [F_LED4_MODE] = REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
191 [F_LED1_DUTY] = REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
192 [F_LED2_DUTY] = REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
193 [F_LED3_DUTY] = REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
194 [F_LED4_DUTY] = REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
195 [F_LED1_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
196 [F_LED2_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
197 [F_LED3_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
198 [F_LED4_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
201 /* Current unit: microamp, time unit: millisecond */
202 static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
203 [R_LED123_CURR] = { 4000, 1, 6, 4000 },
204 [R_LED4_CURR] = { 2000, 1, 3, 2000 },
205 [R_LED_TRFON] = { 125, 0, 15, 200 },
206 [R_LED_TOFF] = { 250, 0, 15, 400 },
209 static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
210 [R_LED123_CURR] = { 2000, 1, 14, 2000 },
211 [R_LED4_CURR] = { 2000, 1, 14, 2000 },
212 [R_LED_TRFON] = { 125, 0, 15, 250 },
213 [R_LED_TOFF] = { 250, 0, 15, 500 },
216 static const unsigned int common_tfreqs[] = {
217 10000, 5000, 2000, 1000, 500, 200, 5, 1,
220 static const unsigned int mt6372_tfreqs[] = {
221 8000, 4000, 2000, 1000, 500, 250, 8, 4,
224 static const struct mt6370_pdata common_pdata = {
225 .tfreq = common_tfreqs,
226 .tfreq_len = ARRAY_SIZE(common_tfreqs),
227 .pwm_duty = MT6370_PWM_DUTY,
228 .reg_rgb1_tr = MT6370_REG_RGB1_TR,
229 .reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
232 static const struct mt6370_pdata mt6372_pdata = {
233 .tfreq = mt6372_tfreqs,
234 .tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
235 .pwm_duty = MT6372_PWM_DUTY,
236 .reg_rgb1_tr = MT6372_REG_RGB1_TR,
237 .reg_rgb_chrind_tr = -1,
240 static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
243 case MT6370_LED_ISNK1:
245 case MT6370_LED_ISNK2:
247 case MT6370_LED_ISNK3:
254 static int mt6370_set_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
257 enum mt6370_led_field sel_field;
259 sel_field = mt6370_get_led_current_field(led_no);
261 return regmap_field_write(priv->fields[sel_field], level);
264 static int mt6370_get_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
267 enum mt6370_led_field sel_field;
269 sel_field = mt6370_get_led_current_field(led_no);
271 return regmap_field_read(priv->fields[sel_field], level);
274 static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
277 const struct mt6370_pdata *pdata = priv->pdata;
278 enum mt6370_led_field sel_field;
279 unsigned int divisor, ratio;
281 divisor = pdata->pwm_duty;
282 ratio = ton * divisor / (ton + toff);
285 case MT6370_LED_ISNK1:
286 sel_field = F_LED1_DUTY;
288 case MT6370_LED_ISNK2:
289 sel_field = F_LED2_DUTY;
291 case MT6370_LED_ISNK3:
292 sel_field = F_LED3_DUTY;
295 sel_field = F_LED4_DUTY;
299 return regmap_field_write(priv->fields[sel_field], ratio);
302 static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
305 const struct mt6370_pdata *pdata = priv->pdata;
306 enum mt6370_led_field sel_field;
307 unsigned int tfreq_len = pdata->tfreq_len;
308 unsigned int tsum, sel;
312 if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
315 sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
318 case MT6370_LED_ISNK1:
319 sel_field = F_LED1_FREQ;
321 case MT6370_LED_ISNK2:
322 sel_field = F_LED2_FREQ;
324 case MT6370_LED_ISNK3:
325 sel_field = F_LED3_FREQ;
328 sel_field = F_LED4_FREQ;
332 return regmap_field_write(priv->fields[sel_field], sel);
335 static void mt6370_get_breath_reg_base(struct mt6370_priv *priv, unsigned int led_no,
338 const struct mt6370_pdata *pdata = priv->pdata;
340 if (pdata->reg_rgb_chrind_tr < 0) {
341 *base = pdata->reg_rgb1_tr + led_no * 3;
346 case MT6370_LED_ISNK1:
347 case MT6370_LED_ISNK2:
348 case MT6370_LED_ISNK3:
349 *base = pdata->reg_rgb1_tr + led_no * 3;
352 *base = pdata->reg_rgb_chrind_tr;
357 static int mt6370_gen_breath_pattern(struct mt6370_priv *priv, struct led_pattern *pattern, u32 len,
358 u8 *pattern_val, u32 val_len)
360 enum mt6370_led_ranges sel_range;
361 struct led_pattern *curr;
366 if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
371 * tr1: byte 0, b'[7:4]
372 * tr2: byte 0, b'[3:0]
373 * tf1: byte 1, b'[7:4]
374 * tf2: byte 1, b'[3:0]
375 * ton: byte 2, b'[7:4]
376 * toff: byte 2, b'[3:0]
378 for (i = 0; i < P_MAX_PATTERNS; i++) {
381 sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
383 linear_range_get_selector_within(priv->ranges + sel_range, curr->delta_t, &sel);
393 put_unaligned_be24(val, pattern_val);
398 static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
399 enum mt6370_led_mode mode)
401 enum mt6370_led_field sel_field;
404 case MT6370_LED_ISNK1:
405 sel_field = F_LED1_MODE;
407 case MT6370_LED_ISNK2:
408 sel_field = F_LED2_MODE;
410 case MT6370_LED_ISNK3:
411 sel_field = F_LED3_MODE;
414 sel_field = F_LED4_MODE;
418 return regmap_field_write(priv->fields[sel_field], mode);
421 static int mt6370_mc_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
423 struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
424 struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
425 struct mt6370_priv *priv = led->priv;
426 struct mc_subled *subled;
427 unsigned int enable, disable;
430 mutex_lock(&priv->lock);
432 led_mc_calc_color_components(mccdev, level);
434 ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
440 for (i = 0; i < mccdev->num_colors; i++) {
443 subled = mccdev->subled_info + i;
444 brightness = min(subled->brightness, lcdev->max_brightness);
445 disable &= ~MT6370_CHEN_BIT(subled->channel);
448 enable &= ~MT6370_CHEN_BIT(subled->channel);
450 ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
457 if (brightness == 0) {
458 enable &= ~MT6370_CHEN_BIT(subled->channel);
462 enable |= MT6370_CHEN_BIT(subled->channel);
464 ret = mt6370_set_led_brightness(priv, subled->channel, brightness);
469 ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
473 ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
476 mutex_unlock(&priv->lock);
481 static int mt6370_mc_blink_set(struct led_classdev *lcdev,
482 unsigned long *delay_on,
483 unsigned long *delay_off)
485 struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
486 struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
487 struct mt6370_priv *priv = led->priv;
488 struct mc_subled *subled;
489 unsigned int enable, disable;
492 mutex_lock(&priv->lock);
494 if (!*delay_on && !*delay_off)
495 *delay_on = *delay_off = 500;
497 ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
503 for (i = 0; i < mccdev->num_colors; i++) {
504 subled = mccdev->subled_info + i;
506 disable &= ~MT6370_CHEN_BIT(subled->channel);
508 ret = mt6370_set_led_duty(priv, subled->channel, *delay_on, *delay_off);
512 ret = mt6370_set_led_freq(priv, subled->channel, *delay_on, *delay_off);
516 ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_PWM_MODE);
521 /* Toggle to make pattern timing the same */
522 ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
526 ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
529 mutex_unlock(&priv->lock);
534 static int mt6370_mc_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
537 struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
538 struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
539 struct mt6370_priv *priv = led->priv;
540 struct mc_subled *subled;
541 unsigned int reg_base, enable, disable;
542 u8 params[P_MAX_PATTERNS / 2];
545 mutex_lock(&priv->lock);
547 ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
551 ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
557 for (i = 0; i < mccdev->num_colors; i++) {
558 subled = mccdev->subled_info + i;
560 mt6370_get_breath_reg_base(priv, subled->channel, ®_base);
561 disable &= ~MT6370_CHEN_BIT(subled->channel);
563 ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
567 ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_BREATH_MODE);
572 /* Toggle to make pattern timing be the same */
573 ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
577 ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
580 mutex_unlock(&priv->lock);
585 static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
587 struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
588 struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
589 struct mt6370_priv *priv = led->priv;
590 struct mc_subled *subled;
593 mutex_lock(&led->priv->lock);
595 for (i = 0; i < mccdev->num_colors; i++) {
596 subled = mccdev->subled_info + i;
598 ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
603 mutex_unlock(&led->priv->lock);
608 static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
609 enum led_brightness level)
611 struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
612 struct mt6370_priv *priv = led->priv;
616 mutex_lock(&priv->lock);
618 ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
623 enable &= ~MT6370_CHEN_BIT(led->index);
625 ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
629 enable |= MT6370_CHEN_BIT(led->index);
631 ret = mt6370_set_led_brightness(priv, led->index, level);
636 ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
639 mutex_unlock(&priv->lock);
644 static int mt6370_isnk_blink_set(struct led_classdev *lcdev, unsigned long *delay_on,
645 unsigned long *delay_off)
647 struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
648 struct mt6370_priv *priv = led->priv;
651 mutex_lock(&priv->lock);
653 if (!*delay_on && !*delay_off)
654 *delay_on = *delay_off = 500;
656 ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
660 ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
664 ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
667 mutex_unlock(&priv->lock);
672 static int mt6370_isnk_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
675 struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
676 struct mt6370_priv *priv = led->priv;
677 unsigned int reg_base;
678 u8 params[P_MAX_PATTERNS / 2];
681 mutex_lock(&priv->lock);
683 ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
687 mt6370_get_breath_reg_base(priv, led->index, ®_base);
689 ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
693 ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
696 mutex_unlock(&priv->lock);
701 static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
703 struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
704 struct mt6370_priv *priv = led->priv;
707 mutex_lock(&led->priv->lock);
708 ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
709 mutex_unlock(&led->priv->lock);
714 static int mt6370_assign_multicolor_info(struct device *dev, struct mt6370_led *led,
715 struct fwnode_handle *fwnode)
717 struct mt6370_priv *priv = led->priv;
718 struct fwnode_handle *child;
719 struct mc_subled *sub_led;
723 sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led), GFP_KERNEL);
727 fwnode_for_each_child_node(fwnode, child) {
730 ret = fwnode_property_read_u32(child, "reg", ®);
731 if (ret || reg > MT6370_LED_ISNK3 || priv->leds_active & BIT(reg)) {
732 fwnode_handle_put(child);
736 ret = fwnode_property_read_u32(child, "color", &color);
738 fwnode_handle_put(child);
739 return dev_err_probe(dev, ret, "LED %d, no color specified\n", led->index);
742 priv->leds_active |= BIT(reg);
743 sub_led[num_color].color_index = color;
744 sub_led[num_color].channel = reg;
745 sub_led[num_color].intensity = 0;
750 return dev_err_probe(dev, -EINVAL,
751 "Multicolor must include 2 or more LED channels\n");
753 led->mc.num_colors = num_color;
754 led->mc.subled_info = sub_led;
759 static int mt6370_init_led_properties(struct device *dev, struct mt6370_led *led,
760 struct led_init_data *init_data)
762 struct mt6370_priv *priv = led->priv;
763 struct led_classdev *lcdev;
764 enum mt6370_led_ranges sel_range;
765 u32 max_uA, max_level;
768 if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
769 ret = mt6370_assign_multicolor_info(dev, led, init_data->fwnode);
773 lcdev = &led->mc.led_cdev;
774 lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
775 lcdev->blink_set = mt6370_mc_blink_set;
776 lcdev->pattern_set = mt6370_mc_pattern_set;
777 lcdev->pattern_clear = mt6370_mc_pattern_clear;
780 lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
781 lcdev->blink_set = mt6370_isnk_blink_set;
782 lcdev->pattern_set = mt6370_isnk_pattern_set;
783 lcdev->pattern_clear = mt6370_isnk_pattern_clear;
786 ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &max_uA);
788 dev_warn(dev, "Not specified led-max-microamp, config to the minimum\n");
792 if (led->index == MT6370_LED_ISNK4)
793 sel_range = R_LED4_CURR;
795 sel_range = R_LED123_CURR;
797 linear_range_get_selector_within(priv->ranges + sel_range, max_uA, &max_level);
799 lcdev->max_brightness = max_level;
801 led->default_state = led_init_default_state_get(init_data->fwnode);
806 static int mt6370_isnk_init_default_state(struct mt6370_led *led)
808 struct mt6370_priv *priv = led->priv;
809 unsigned int enable, level;
812 ret = mt6370_get_led_brightness(priv, led->index, &level);
816 ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
820 if (!(enable & MT6370_CHEN_BIT(led->index)))
823 switch (led->default_state) {
824 case LEDS_DEFSTATE_ON:
825 led->isink.brightness = led->isink.max_brightness;
827 case LEDS_DEFSTATE_KEEP:
828 led->isink.brightness = min(level, led->isink.max_brightness);
831 led->isink.brightness = 0;
835 return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
838 static int mt6370_multicolor_led_register(struct device *dev, struct mt6370_led *led,
839 struct led_init_data *init_data)
843 ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
845 return dev_err_probe(dev, ret, "Couldn't set multicolor brightness\n");
847 ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc, init_data);
849 return dev_err_probe(dev, ret, "Couldn't register multicolor\n");
854 static int mt6370_led_register(struct device *dev, struct mt6370_led *led,
855 struct led_init_data *init_data)
857 struct mt6370_priv *priv = led->priv;
860 if (led->index == MT6370_VIRTUAL_MULTICOLOR)
861 return mt6370_multicolor_led_register(dev, led, init_data);
863 /* If ISNK4 is declared, change its mode from HW auto to SW control */
864 if (led->index == MT6370_LED_ISNK4) {
865 ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
867 return dev_err_probe(dev, ret, "Failed to set CHRIND to SW\n");
870 ret = mt6370_isnk_init_default_state(led);
872 return dev_err_probe(dev, ret, "Failed to init %d isnk state\n", led->index);
874 ret = devm_led_classdev_register_ext(dev, &led->isink, init_data);
876 return dev_err_probe(dev, ret, "Couldn't register isink %d\n", led->index);
881 static int mt6370_check_vendor_info(struct mt6370_priv *priv)
883 unsigned int devinfo, vid;
886 ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
890 vid = FIELD_GET(MT6370_VENDOR_ID_MASK, devinfo);
891 if (vid == MT6372_VENDOR_ID || vid == MT6372C_VENDOR_ID) {
892 priv->reg_fields = mt6372_reg_fields;
893 priv->ranges = mt6372_led_ranges;
894 priv->pdata = &mt6372_pdata;
896 /* Common for MT6370/71 */
897 priv->reg_fields = common_reg_fields;
898 priv->ranges = common_led_ranges;
899 priv->pdata = &common_pdata;
905 static int mt6370_leds_probe(struct platform_device *pdev)
907 struct device *dev = &pdev->dev;
908 struct mt6370_priv *priv;
909 struct fwnode_handle *child;
914 count = device_get_child_node_count(dev);
915 if (!count || count > MT6370_MAX_LEDS)
916 return dev_err_probe(dev, -EINVAL,
917 "No child node or node count over max LED number %zu\n",
920 priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
924 priv->leds_count = count;
925 mutex_init(&priv->lock);
927 priv->regmap = dev_get_regmap(dev->parent, NULL);
929 return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
931 ret = mt6370_check_vendor_info(priv);
933 return dev_err_probe(dev, ret, "Failed to check vendor info\n");
935 ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields, priv->reg_fields,
938 return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
940 device_for_each_child_node(dev, child) {
941 struct mt6370_led *led = priv->leds + i++;
942 struct led_init_data init_data = { .fwnode = child };
945 ret = fwnode_property_read_u32(child, "reg", ®);
947 dev_err(dev, "Failed to parse reg property\n");
951 if (reg >= MT6370_MAX_LEDS) {
953 dev_err(dev, "Error reg property number\n");
957 ret = fwnode_property_read_u32(child, "color", &color);
959 dev_err(dev, "Failed to parse color property\n");
963 if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
964 reg = MT6370_VIRTUAL_MULTICOLOR;
966 if (priv->leds_active & BIT(reg)) {
968 dev_err(dev, "Duplicate reg property\n");
972 priv->leds_active |= BIT(reg);
977 ret = mt6370_init_led_properties(dev, led, &init_data);
981 ret = mt6370_led_register(dev, led, &init_data);
989 fwnode_handle_put(child);
993 static const struct of_device_id mt6370_rgbled_device_table[] = {
994 { .compatible = "mediatek,mt6370-indicator" },
997 MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
999 static struct platform_driver mt6370_rgbled_driver = {
1001 .name = "mt6370-indicator",
1002 .of_match_table = mt6370_rgbled_device_table,
1004 .probe = mt6370_leds_probe,
1006 module_platform_driver(mt6370_rgbled_driver);
1008 MODULE_AUTHOR("Alice Chen <alice_chen@richtek.com>");
1009 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
1010 MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
1011 MODULE_LICENSE("GPL");