// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2023 Richtek Technology Corp.
*
* Authors:
* ChiYuan Huang <cy_huang@richtek.com>
* Alice Chen <alice_chen@richtek.com>
*/
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/led-class-multicolor.h>
#include <linux/linear_range.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#include <asm/unaligned.h>
enum {
MT6370_LED_ISNK1 = 0,
MT6370_LED_ISNK2,
MT6370_LED_ISNK3,
MT6370_LED_ISNK4,
MT6370_MAX_LEDS
};
enum mt6370_led_mode {
MT6370_LED_PWM_MODE = 0,
MT6370_LED_BREATH_MODE,
MT6370_LED_REG_MODE,
MT6370_LED_MAX_MODE
};
enum mt6370_led_field {
F_RGB_EN = 0,
F_CHGIND_EN,
F_LED1_CURR,
F_LED2_CURR,
F_LED3_CURR,
F_LED4_CURR,
F_LED1_MODE,
F_LED2_MODE,
F_LED3_MODE,
F_LED4_MODE,
F_LED1_DUTY,
F_LED2_DUTY,
F_LED3_DUTY,
F_LED4_DUTY,
F_LED1_FREQ,
F_LED2_FREQ,
F_LED3_FREQ,
F_LED4_FREQ,
F_MAX_FIELDS
};
enum mt6370_led_ranges {
R_LED123_CURR = 0,
R_LED4_CURR,
R_LED_TRFON,
R_LED_TOFF,
R_MAX_RANGES
};
enum mt6370_pattern {
P_LED_TR1 = 0,
P_LED_TR2,
P_LED_TF1,
P_LED_TF2,
P_LED_TON,
P_LED_TOFF,
P_MAX_PATTERNS
};
#define MT6370_REG_DEV_INFO 0x100
#define MT6370_REG_RGB1_DIM 0x182
#define MT6370_REG_RGB2_DIM 0x183
#define MT6370_REG_RGB3_DIM 0x184
#define MT6370_REG_RGB_EN 0x185
#define MT6370_REG_RGB1_ISNK 0x186
#define MT6370_REG_RGB2_ISNK 0x187
#define MT6370_REG_RGB3_ISNK 0x188
#define MT6370_REG_RGB1_TR 0x189
#define MT6370_REG_RGB_CHRIND_DIM 0x192
#define MT6370_REG_RGB_CHRIND_CTRL 0x193
#define MT6370_REG_RGB_CHRIND_TR 0x194
#define MT6372_REG_RGB_EN 0x182
#define MT6372_REG_RGB1_ISNK 0x183
#define MT6372_REG_RGB2_ISNK 0x184
#define MT6372_REG_RGB3_ISNK 0x185
#define MT6372_REG_RGB4_ISNK 0x186
#define MT6372_REG_RGB1_DIM 0x187
#define MT6372_REG_RGB2_DIM 0x188
#define MT6372_REG_RGB3_DIM 0x189
#define MT6372_REG_RGB4_DIM 0x18A
#define MT6372_REG_RGB12_FREQ 0x18B
#define MT6372_REG_RGB34_FREQ 0x18C
#define MT6372_REG_RGB1_TR 0x18D
#define MT6370_VENDOR_ID_MASK GENMASK(7, 4)
#define MT6372_VENDOR_ID 0x9
#define MT6372C_VENDOR_ID 0xb
#define MT6370_CHEN_BIT(id) BIT(MT6370_LED_ISNK4 - id)
#define MT6370_VIRTUAL_MULTICOLOR 5
#define MC_CHANNEL_NUM 3
#define MT6370_PWM_DUTY (BIT(5) - 1)
#define MT6372_PWM_DUTY (BIT(8) - 1)
struct mt6370_led {
/*
* If the color of the LED in DT is set to
* - 'LED_COLOR_ID_RGB'
* - 'LED_COLOR_ID_MULTI'
* The member 'index' of this struct will be set to
* 'MT6370_VIRTUAL_MULTICOLOR'.
* If so, this LED will choose 'struct led_classdev_mc mc' to use.
* Instead, if the member 'index' of this struct is set to
* 'MT6370_LED_ISNK1' ~ 'MT6370_LED_ISNK4', then this LED will choose
* 'struct led_classdev isink' to use.
*/
union {
struct led_classdev isink;
struct led_classdev_mc mc;
};
struct mt6370_priv *priv;
enum led_default_state default_state;
u32 index;
};
struct mt6370_pdata {
const unsigned int *tfreq;
unsigned int tfreq_len;
u16 reg_rgb1_tr;
s16 reg_rgb_chrind_tr;
u8 pwm_duty;
};
struct mt6370_priv {
/* Per LED access lock */
struct mutex lock;
struct regmap *regmap;
struct regmap_field *fields[F_MAX_FIELDS];
const struct reg_field *reg_fields;
const struct linear_range *ranges;
struct reg_cfg *reg_cfgs;
const struct mt6370_pdata *pdata;
unsigned int leds_count;
unsigned int leds_active;
struct mt6370_led leds[] __counted_by(leds_count);
};
static const struct reg_field common_reg_fields[F_MAX_FIELDS] = {
[F_RGB_EN] = REG_FIELD(MT6370_REG_RGB_EN, 4, 7),
[F_CHGIND_EN] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 7, 7),
[F_LED1_CURR] = REG_FIELD(MT6370_REG_RGB1_ISNK, 0, 2),
[F_LED2_CURR] = REG_FIELD(MT6370_REG_RGB2_ISNK, 0, 2),
[F_LED3_CURR] = REG_FIELD(MT6370_REG_RGB3_ISNK, 0, 2),
[F_LED4_CURR] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 0, 1),
[F_LED1_MODE] = REG_FIELD(MT6370_REG_RGB1_DIM, 5, 6),
[F_LED2_MODE] = REG_FIELD(MT6370_REG_RGB2_DIM, 5, 6),
[F_LED3_MODE] = REG_FIELD(MT6370_REG_RGB3_DIM, 5, 6),
[F_LED4_MODE] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 5, 6),
[F_LED1_DUTY] = REG_FIELD(MT6370_REG_RGB1_DIM, 0, 4),
[F_LED2_DUTY] = REG_FIELD(MT6370_REG_RGB2_DIM, 0, 4),
[F_LED3_DUTY] = REG_FIELD(MT6370_REG_RGB3_DIM, 0, 4),
[F_LED4_DUTY] = REG_FIELD(MT6370_REG_RGB_CHRIND_DIM, 0, 4),
[F_LED1_FREQ] = REG_FIELD(MT6370_REG_RGB1_ISNK, 3, 5),
[F_LED2_FREQ] = REG_FIELD(MT6370_REG_RGB2_ISNK, 3, 5),
[F_LED3_FREQ] = REG_FIELD(MT6370_REG_RGB3_ISNK, 3, 5),
[F_LED4_FREQ] = REG_FIELD(MT6370_REG_RGB_CHRIND_CTRL, 2, 4),
};
static const struct reg_field mt6372_reg_fields[F_MAX_FIELDS] = {
[F_RGB_EN] = REG_FIELD(MT6372_REG_RGB_EN, 4, 7),
[F_CHGIND_EN] = REG_FIELD(MT6372_REG_RGB_EN, 3, 3),
[F_LED1_CURR] = REG_FIELD(MT6372_REG_RGB1_ISNK, 0, 3),
[F_LED2_CURR] = REG_FIELD(MT6372_REG_RGB2_ISNK, 0, 3),
[F_LED3_CURR] = REG_FIELD(MT6372_REG_RGB3_ISNK, 0, 3),
[F_LED4_CURR] = REG_FIELD(MT6372_REG_RGB4_ISNK, 0, 3),
[F_LED1_MODE] = REG_FIELD(MT6372_REG_RGB1_ISNK, 6, 7),
[F_LED2_MODE] = REG_FIELD(MT6372_REG_RGB2_ISNK, 6, 7),
[F_LED3_MODE] = REG_FIELD(MT6372_REG_RGB3_ISNK, 6, 7),
[F_LED4_MODE] = REG_FIELD(MT6372_REG_RGB4_ISNK, 6, 7),
[F_LED1_DUTY] = REG_FIELD(MT6372_REG_RGB1_DIM, 0, 7),
[F_LED2_DUTY] = REG_FIELD(MT6372_REG_RGB2_DIM, 0, 7),
[F_LED3_DUTY] = REG_FIELD(MT6372_REG_RGB3_DIM, 0, 7),
[F_LED4_DUTY] = REG_FIELD(MT6372_REG_RGB4_DIM, 0, 7),
[F_LED1_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 5, 7),
[F_LED2_FREQ] = REG_FIELD(MT6372_REG_RGB12_FREQ, 2, 4),
[F_LED3_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 5, 7),
[F_LED4_FREQ] = REG_FIELD(MT6372_REG_RGB34_FREQ, 2, 4),
};
/* Current unit: microamp, time unit: millisecond */
static const struct linear_range common_led_ranges[R_MAX_RANGES] = {
[R_LED123_CURR] = { 4000, 1, 6, 4000 },
[R_LED4_CURR] = { 2000, 1, 3, 2000 },
[R_LED_TRFON] = { 125, 0, 15, 200 },
[R_LED_TOFF] = { 250, 0, 15, 400 },
};
static const struct linear_range mt6372_led_ranges[R_MAX_RANGES] = {
[R_LED123_CURR] = { 2000, 1, 14, 2000 },
[R_LED4_CURR] = { 2000, 1, 14, 2000 },
[R_LED_TRFON] = { 125, 0, 15, 250 },
[R_LED_TOFF] = { 250, 0, 15, 500 },
};
static const unsigned int common_tfreqs[] = {
10000, 5000, 2000, 1000, 500, 200, 5, 1,
};
static const unsigned int mt6372_tfreqs[] = {
8000, 4000, 2000, 1000, 500, 250, 8, 4,
};
static const struct mt6370_pdata common_pdata = {
.tfreq = common_tfreqs,
.tfreq_len = ARRAY_SIZE(common_tfreqs),
.pwm_duty = MT6370_PWM_DUTY,
.reg_rgb1_tr = MT6370_REG_RGB1_TR,
.reg_rgb_chrind_tr = MT6370_REG_RGB_CHRIND_TR,
};
static const struct mt6370_pdata mt6372_pdata = {
.tfreq = mt6372_tfreqs,
.tfreq_len = ARRAY_SIZE(mt6372_tfreqs),
.pwm_duty = MT6372_PWM_DUTY,
.reg_rgb1_tr = MT6372_REG_RGB1_TR,
.reg_rgb_chrind_tr = -1,
};
static enum mt6370_led_field mt6370_get_led_current_field(unsigned int led_no)
{
switch (led_no) {
case MT6370_LED_ISNK1:
return F_LED1_CURR;
case MT6370_LED_ISNK2:
return F_LED2_CURR;
case MT6370_LED_ISNK3:
return F_LED3_CURR;
default:
return F_LED4_CURR;
}
}
static int mt6370_set_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
unsigned int level)
{
enum mt6370_led_field sel_field;
sel_field = mt6370_get_led_current_field(led_no);
return regmap_field_write(priv->fields[sel_field], level);
}
static int mt6370_get_led_brightness(struct mt6370_priv *priv, unsigned int led_no,
unsigned int *level)
{
enum mt6370_led_field sel_field;
sel_field = mt6370_get_led_current_field(led_no);
return regmap_field_read(priv->fields[sel_field], level);
}
static int mt6370_set_led_duty(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
unsigned int toff)
{
const struct mt6370_pdata *pdata = priv->pdata;
enum mt6370_led_field sel_field;
unsigned int divisor, ratio;
divisor = pdata->pwm_duty;
ratio = ton * divisor / (ton + toff);
switch (led_no) {
case MT6370_LED_ISNK1:
sel_field = F_LED1_DUTY;
break;
case MT6370_LED_ISNK2:
sel_field = F_LED2_DUTY;
break;
case MT6370_LED_ISNK3:
sel_field = F_LED3_DUTY;
break;
default:
sel_field = F_LED4_DUTY;
break;
}
return regmap_field_write(priv->fields[sel_field], ratio);
}
static int mt6370_set_led_freq(struct mt6370_priv *priv, unsigned int led_no, unsigned int ton,
unsigned int toff)
{
const struct mt6370_pdata *pdata = priv->pdata;
enum mt6370_led_field sel_field;
unsigned int tfreq_len = pdata->tfreq_len;
unsigned int tsum, sel;
tsum = ton + toff;
if (tsum > pdata->tfreq[0] || tsum < pdata->tfreq[tfreq_len - 1])
return -EOPNOTSUPP;
sel = find_closest_descending(tsum, pdata->tfreq, tfreq_len);
switch (led_no) {
case MT6370_LED_ISNK1:
sel_field = F_LED1_FREQ;
break;
case MT6370_LED_ISNK2:
sel_field = F_LED2_FREQ;
break;
case MT6370_LED_ISNK3:
sel_field = F_LED3_FREQ;
break;
default:
sel_field = F_LED4_FREQ;
break;
}
return regmap_field_write(priv->fields[sel_field], sel);
}
static void mt6370_get_breath_reg_base(struct mt6370_priv *priv, unsigned int led_no,
unsigned int *base)
{
const struct mt6370_pdata *pdata = priv->pdata;
if (pdata->reg_rgb_chrind_tr < 0) {
*base = pdata->reg_rgb1_tr + led_no * 3;
return;
}
switch (led_no) {
case MT6370_LED_ISNK1:
case MT6370_LED_ISNK2:
case MT6370_LED_ISNK3:
*base = pdata->reg_rgb1_tr + led_no * 3;
break;
default:
*base = pdata->reg_rgb_chrind_tr;
break;
}
}
static int mt6370_gen_breath_pattern(struct mt6370_priv *priv, struct led_pattern *pattern, u32 len,
u8 *pattern_val, u32 val_len)
{
enum mt6370_led_ranges sel_range;
struct led_pattern *curr;
unsigned int sel;
u32 val = 0;
int i;
if (len < P_MAX_PATTERNS && val_len < P_MAX_PATTERNS / 2)
return -EINVAL;
/*
* Pattern list
* tr1: byte 0, b'[7:4]
* tr2: byte 0, b'[3:0]
* tf1: byte 1, b'[7:4]
* tf2: byte 1, b'[3:0]
* ton: byte 2, b'[7:4]
* toff: byte 2, b'[3:0]
*/
for (i = 0; i < P_MAX_PATTERNS; i++) {
curr = pattern + i;
sel_range = i == P_LED_TOFF ? R_LED_TOFF : R_LED_TRFON;
linear_range_get_selector_within(priv->ranges + sel_range, curr->delta_t, &sel);
if (i % 2) {
val |= sel;
} else {
val <<= 8;
val |= sel << 4;
}
}
put_unaligned_be24(val, pattern_val);
return 0;
}
static int mt6370_set_led_mode(struct mt6370_priv *priv, unsigned int led_no,
enum mt6370_led_mode mode)
{
enum mt6370_led_field sel_field;
switch (led_no) {
case MT6370_LED_ISNK1:
sel_field = F_LED1_MODE;
break;
case MT6370_LED_ISNK2:
sel_field = F_LED2_MODE;
break;
case MT6370_LED_ISNK3:
sel_field = F_LED3_MODE;
break;
default:
sel_field = F_LED4_MODE;
break;
}
return regmap_field_write(priv->fields[sel_field], mode);
}
static int mt6370_mc_brightness_set(struct led_classdev *lcdev, enum led_brightness level)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
unsigned int enable, disable;
int i, ret;
mutex_lock(&priv->lock);
led_mc_calc_color_components(mccdev, level);
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
disable = enable;
for (i = 0; i < mccdev->num_colors; i++) {
u32 brightness;
subled = mccdev->subled_info + i;
brightness = min(subled->brightness, lcdev->max_brightness);
disable &= ~MT6370_CHEN_BIT(subled->channel);
if (level == 0) {
enable &= ~MT6370_CHEN_BIT(subled->channel);
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
if (ret)
goto out_unlock;
continue;
}
if (brightness == 0) {
enable &= ~MT6370_CHEN_BIT(subled->channel);
continue;
}
enable |= MT6370_CHEN_BIT(subled->channel);
ret = mt6370_set_led_brightness(priv, subled->channel, brightness);
if (ret)
goto out_unlock;
}
ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
if (ret)
goto out_unlock;
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_mc_blink_set(struct led_classdev *lcdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
unsigned int enable, disable;
int i, ret;
mutex_lock(&priv->lock);
if (!*delay_on && !*delay_off)
*delay_on = *delay_off = 500;
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
disable = enable;
for (i = 0; i < mccdev->num_colors; i++) {
subled = mccdev->subled_info + i;
disable &= ~MT6370_CHEN_BIT(subled->channel);
ret = mt6370_set_led_duty(priv, subled->channel, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_freq(priv, subled->channel, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_PWM_MODE);
if (ret)
goto out_unlock;
}
/* Toggle to make pattern timing the same */
ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
if (ret)
goto out_unlock;
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_mc_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
int repeat)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
unsigned int reg_base, enable, disable;
u8 params[P_MAX_PATTERNS / 2];
int i, ret;
mutex_lock(&priv->lock);
ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
if (ret)
goto out_unlock;
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
disable = enable;
for (i = 0; i < mccdev->num_colors; i++) {
subled = mccdev->subled_info + i;
mt6370_get_breath_reg_base(priv, subled->channel, ®_base);
disable &= ~MT6370_CHEN_BIT(subled->channel);
ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_BREATH_MODE);
if (ret)
goto out_unlock;
}
/* Toggle to make pattern timing be the same */
ret = regmap_field_write(priv->fields[F_RGB_EN], disable);
if (ret)
goto out_unlock;
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static inline int mt6370_mc_pattern_clear(struct led_classdev *lcdev)
{
struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
struct mt6370_led *led = container_of(mccdev, struct mt6370_led, mc);
struct mt6370_priv *priv = led->priv;
struct mc_subled *subled;
int i, ret;
mutex_lock(&led->priv->lock);
for (i = 0; i < mccdev->num_colors; i++) {
subled = mccdev->subled_info + i;
ret = mt6370_set_led_mode(priv, subled->channel, MT6370_LED_REG_MODE);
if (ret)
break;
}
mutex_unlock(&led->priv->lock);
return ret;
}
static int mt6370_isnk_brightness_set(struct led_classdev *lcdev,
enum led_brightness level)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
unsigned int enable;
int ret;
mutex_lock(&priv->lock);
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
goto out_unlock;
if (level == 0) {
enable &= ~MT6370_CHEN_BIT(led->index);
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
if (ret)
goto out_unlock;
} else {
enable |= MT6370_CHEN_BIT(led->index);
ret = mt6370_set_led_brightness(priv, led->index, level);
if (ret)
goto out_unlock;
}
ret = regmap_field_write(priv->fields[F_RGB_EN], enable);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_isnk_blink_set(struct led_classdev *lcdev, unsigned long *delay_on,
unsigned long *delay_off)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
int ret;
mutex_lock(&priv->lock);
if (!*delay_on && !*delay_off)
*delay_on = *delay_off = 500;
ret = mt6370_set_led_duty(priv, led->index, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_freq(priv, led->index, *delay_on, *delay_off);
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_PWM_MODE);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static int mt6370_isnk_pattern_set(struct led_classdev *lcdev, struct led_pattern *pattern, u32 len,
int repeat)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
unsigned int reg_base;
u8 params[P_MAX_PATTERNS / 2];
int ret;
mutex_lock(&priv->lock);
ret = mt6370_gen_breath_pattern(priv, pattern, len, params, sizeof(params));
if (ret)
goto out_unlock;
mt6370_get_breath_reg_base(priv, led->index, ®_base);
ret = regmap_raw_write(priv->regmap, reg_base, params, sizeof(params));
if (ret)
goto out_unlock;
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_BREATH_MODE);
out_unlock:
mutex_unlock(&priv->lock);
return ret;
}
static inline int mt6370_isnk_pattern_clear(struct led_classdev *lcdev)
{
struct mt6370_led *led = container_of(lcdev, struct mt6370_led, isink);
struct mt6370_priv *priv = led->priv;
int ret;
mutex_lock(&led->priv->lock);
ret = mt6370_set_led_mode(priv, led->index, MT6370_LED_REG_MODE);
mutex_unlock(&led->priv->lock);
return ret;
}
static int mt6370_assign_multicolor_info(struct device *dev, struct mt6370_led *led,
struct fwnode_handle *fwnode)
{
struct mt6370_priv *priv = led->priv;
struct fwnode_handle *child;
struct mc_subled *sub_led;
u32 num_color = 0;
int ret;
sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led), GFP_KERNEL);
if (!sub_led)
return -ENOMEM;
fwnode_for_each_child_node(fwnode, child) {
u32 reg, color;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret || reg > MT6370_LED_ISNK3 || priv->leds_active & BIT(reg)) {
fwnode_handle_put(child);
return -EINVAL;
}
ret = fwnode_property_read_u32(child, "color", &color);
if (ret) {
fwnode_handle_put(child);
return dev_err_probe(dev, ret, "LED %d, no color specified\n", led->index);
}
priv->leds_active |= BIT(reg);
sub_led[num_color].color_index = color;
sub_led[num_color].channel = reg;
sub_led[num_color].intensity = 0;
num_color++;
}
if (num_color < 2)
return dev_err_probe(dev, -EINVAL,
"Multicolor must include 2 or more LED channels\n");
led->mc.num_colors = num_color;
led->mc.subled_info = sub_led;
return 0;
}
static int mt6370_init_led_properties(struct device *dev, struct mt6370_led *led,
struct led_init_data *init_data)
{
struct mt6370_priv *priv = led->priv;
struct led_classdev *lcdev;
enum mt6370_led_ranges sel_range;
u32 max_uA, max_level;
int ret;
if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
ret = mt6370_assign_multicolor_info(dev, led, init_data->fwnode);
if (ret)
return ret;
lcdev = &led->mc.led_cdev;
lcdev->brightness_set_blocking = mt6370_mc_brightness_set;
lcdev->blink_set = mt6370_mc_blink_set;
lcdev->pattern_set = mt6370_mc_pattern_set;
lcdev->pattern_clear = mt6370_mc_pattern_clear;
} else {
lcdev = &led->isink;
lcdev->brightness_set_blocking = mt6370_isnk_brightness_set;
lcdev->blink_set = mt6370_isnk_blink_set;
lcdev->pattern_set = mt6370_isnk_pattern_set;
lcdev->pattern_clear = mt6370_isnk_pattern_clear;
}
ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &max_uA);
if (ret) {
dev_warn(dev, "Not specified led-max-microamp, config to the minimum\n");
max_uA = 0;
}
if (led->index == MT6370_LED_ISNK4)
sel_range = R_LED4_CURR;
else
sel_range = R_LED123_CURR;
linear_range_get_selector_within(priv->ranges + sel_range, max_uA, &max_level);
lcdev->max_brightness = max_level;
led->default_state = led_init_default_state_get(init_data->fwnode);
return 0;
}
static int mt6370_isnk_init_default_state(struct mt6370_led *led)
{
struct mt6370_priv *priv = led->priv;
unsigned int enable, level;
int ret;
ret = mt6370_get_led_brightness(priv, led->index, &level);
if (ret)
return ret;
ret = regmap_field_read(priv->fields[F_RGB_EN], &enable);
if (ret)
return ret;
if (!(enable & MT6370_CHEN_BIT(led->index)))
level = 0;
switch (led->default_state) {
case LEDS_DEFSTATE_ON:
led->isink.brightness = led->isink.max_brightness;
break;
case LEDS_DEFSTATE_KEEP:
led->isink.brightness = min(level, led->isink.max_brightness);
break;
default:
led->isink.brightness = 0;
break;
}
return mt6370_isnk_brightness_set(&led->isink, led->isink.brightness);
}
static int mt6370_multicolor_led_register(struct device *dev, struct mt6370_led *led,
struct led_init_data *init_data)
{
int ret;
ret = mt6370_mc_brightness_set(&led->mc.led_cdev, 0);
if (ret)
return dev_err_probe(dev, ret, "Couldn't set multicolor brightness\n");
ret = devm_led_classdev_multicolor_register_ext(dev, &led->mc, init_data);
if (ret)
return dev_err_probe(dev, ret, "Couldn't register multicolor\n");
return 0;
}
static int mt6370_led_register(struct device *dev, struct mt6370_led *led,
struct led_init_data *init_data)
{
struct mt6370_priv *priv = led->priv;
int ret;
if (led->index == MT6370_VIRTUAL_MULTICOLOR)
return mt6370_multicolor_led_register(dev, led, init_data);
/* If ISNK4 is declared, change its mode from HW auto to SW control */
if (led->index == MT6370_LED_ISNK4) {
ret = regmap_field_write(priv->fields[F_CHGIND_EN], 1);
if (ret)
return dev_err_probe(dev, ret, "Failed to set CHRIND to SW\n");
}
ret = mt6370_isnk_init_default_state(led);
if (ret)
return dev_err_probe(dev, ret, "Failed to init %d isnk state\n", led->index);
ret = devm_led_classdev_register_ext(dev, &led->isink, init_data);
if (ret)
return dev_err_probe(dev, ret, "Couldn't register isink %d\n", led->index);
return 0;
}
static int mt6370_check_vendor_info(struct mt6370_priv *priv)
{
unsigned int devinfo, vid;
int ret;
ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &devinfo);
if (ret)
return ret;
vid = FIELD_GET(MT6370_VENDOR_ID_MASK, devinfo);
if (vid == MT6372_VENDOR_ID || vid == MT6372C_VENDOR_ID) {
priv->reg_fields = mt6372_reg_fields;
priv->ranges = mt6372_led_ranges;
priv->pdata = &mt6372_pdata;
} else {
/* Common for MT6370/71 */
priv->reg_fields = common_reg_fields;
priv->ranges = common_led_ranges;
priv->pdata = &common_pdata;
}
return 0;
}
static int mt6370_leds_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mt6370_priv *priv;
struct fwnode_handle *child;
size_t count;
unsigned int i = 0;
int ret;
count = device_get_child_node_count(dev);
if (!count || count > MT6370_MAX_LEDS)
return dev_err_probe(dev, -EINVAL,
"No child node or node count over max LED number %zu\n",
count);
priv = devm_kzalloc(dev, struct_size(priv, leds, count), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->leds_count = count;
mutex_init(&priv->lock);
priv->regmap = dev_get_regmap(dev->parent, NULL);
if (!priv->regmap)
return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
ret = mt6370_check_vendor_info(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to check vendor info\n");
ret = devm_regmap_field_bulk_alloc(dev, priv->regmap, priv->fields, priv->reg_fields,
F_MAX_FIELDS);
if (ret)
return dev_err_probe(dev, ret, "Failed to allocate regmap field\n");
device_for_each_child_node(dev, child) {
struct mt6370_led *led = priv->leds + i++;
struct led_init_data init_data = { .fwnode = child };
u32 reg, color;
ret = fwnode_property_read_u32(child, "reg", ®);
if (ret) {
dev_err(dev, "Failed to parse reg property\n");
goto fwnode_release;
}
if (reg >= MT6370_MAX_LEDS) {
ret = -EINVAL;
dev_err(dev, "Error reg property number\n");
goto fwnode_release;
}
ret = fwnode_property_read_u32(child, "color", &color);
if (ret) {
dev_err(dev, "Failed to parse color property\n");
goto fwnode_release;
}
if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
reg = MT6370_VIRTUAL_MULTICOLOR;
if (priv->leds_active & BIT(reg)) {
ret = -EINVAL;
dev_err(dev, "Duplicate reg property\n");
goto fwnode_release;
}
priv->leds_active |= BIT(reg);
led->index = reg;
led->priv = priv;
ret = mt6370_init_led_properties(dev, led, &init_data);
if (ret)
goto fwnode_release;
ret = mt6370_led_register(dev, led, &init_data);
if (ret)
goto fwnode_release;
}
return 0;
fwnode_release:
fwnode_handle_put(child);
return ret;
}
static const struct of_device_id mt6370_rgbled_device_table[] = {
{ .compatible = "mediatek,mt6370-indicator" },
{}
};
MODULE_DEVICE_TABLE(of, mt6370_rgbled_device_table);
static struct platform_driver mt6370_rgbled_driver = {
.driver = {
.name = "mt6370-indicator",
.of_match_table = mt6370_rgbled_device_table,
},
.probe = mt6370_leds_probe,
};
module_platform_driver(mt6370_rgbled_driver);
MODULE_AUTHOR("Alice Chen <alice_chen@richtek.com>");
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_DESCRIPTION("MediaTek MT6370 RGB LED Driver");
MODULE_LICENSE("GPL");
