[PATCH v16 1/2] leds: rgb: mt6370: Add MediaTek MT6370 current sink type LED Indicator support

ChiaEn Wu
2023-01-17T09:34:59Z

From: ChiYuan Huang <cy_huang@richtek.com>

The MediaTek MT6370 is a highly-integrated smart power management IC,
which includes a single cell Li-Ion/Li-Polymer switching battery
charger, a USB Type-C & Power Delivery (PD) controller, dual
Flash LED current sources, a RGB LED driver, a backlight WLED driver,
a display bias driver and a general LDO for portable devices.

Add support for the MediaTek MT6370 Current Sink Type LED Indicator
driver. It can control four channels current-sink RGB LEDs with 3 modes:
constant current, PWM, and breath mode.

Co-developed-by: Alice Chen <alice_chen@richtek.com>
Signed-off-by: Alice Chen <alice_chen@richtek.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
---

v16
- Remove blank line in the head text.
- Move 'pwm_duty' to descrease the size of struct mt6370_pdata.
- Move the field 'F_RGB_EN' write out from if/else in
'mt6370_isnk_brightness_set'.
- Remove 'dev' in struct mt6370_priv.
- Remove the proprety reading for 'linux,default-trigger', led core
already did it.
- Change the module license from 'GPL v2' to 'GPL'
In the head text, already deslcred SPDX license as 'GPL-2.0-only'.
---
drivers/leds/rgb/Kconfig | 13 +
drivers/leds/rgb/Makefile | 1 +
drivers/leds/rgb/leds-mt6370-rgb.c | 1009 ++++++++++++++++++++++++++++++++++++
3 files changed, 1023 insertions(+)
create mode 100644 drivers/leds/rgb/leds-mt6370-rgb.c

diff --git a/drivers/leds/rgb/Kconfig b/drivers/leds/rgb/Kconfig
index 204cf47..7d86bb2 100644
--- a/drivers/leds/rgb/Kconfig
+++ b/drivers/leds/rgb/Kconfig
@@ -26,4 +26,17 @@ config LEDS_QCOM_LPG

If compiled as a module, the module will be named leds-qcom-lpg.

+config LEDS_MT6370_RGB
+ tristate "LED Support for MediaTek MT6370 PMIC"
+ depends on MFD_MT6370
+ select LINEAR_RANGE
+ help
+ Say Y here to enable support for MT6370_RGB LED device.
+ In MT6370, there are four channel current-sink LED drivers that
+ support hardware pattern for constant current, PWM, and breath mode.
+ Isink4 channel can also be used as a CHG_VIN power good indicator.
+
+ This driver can also be built as a module. If so, the module
+ will be called "leds-mt6370-rgb".
+
endif # LEDS_CLASS_MULTICOLOR
diff --git a/drivers/leds/rgb/Makefile b/drivers/leds/rgb/Makefile
index 0675bc0..8c01daf 100644
--- a/drivers/leds/rgb/Makefile
+++ b/drivers/leds/rgb/Makefile
@@ -2,3 +2,4 @@

obj-$(CONFIG_LEDS_PWM_MULTICOLOR) += leds-pwm-multicolor.o
obj-$(CONFIG_LEDS_QCOM_LPG) += leds-qcom-lpg.o
+obj-$(CONFIG_LEDS_MT6370_RGB) += leds-mt6370-rgb.o
diff --git a/drivers/leds/rgb/leds-mt6370-rgb.c b/drivers/leds/rgb/leds-mt6370-rgb.c
new file mode 100644
index 00000000..2a5d582
--- /dev/null
+++ b/drivers/leds/rgb/leds-mt6370-rgb.c
@@ -0,0 +1,1009 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Authors:
+ * ChiYuan Huang <cy_huang@richtek.com>
+ * Alice Chen <alice_chen@richtek.com>
+ */
+
+#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_VENID_MASK GENMASK(7, 4)
+#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[];
+};
+
+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, &reg_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, &reg_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_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;
+ struct fwnode_handle *child;
+ enum mt6370_led_ranges sel_range;
+ u32 max_uA, max_level;
+ int ret;
+
+ if (led->index == MT6370_VIRTUAL_MULTICOLOR) {
+ struct mc_subled *sub_led;
+ u32 num_color = 0;
+
+ sub_led = devm_kcalloc(dev, MC_CHANNEL_NUM, sizeof(*sub_led),
+ GFP_KERNEL);
+ if (!sub_led)
+ return -ENOMEM;
+
+ fwnode_for_each_child_node(init_data->fwnode, child) {
+ u32 reg, color;
+
+ ret = fwnode_property_read_u32(child, "reg", &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;
+
+ 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_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) {
+ 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");
+ } else {
+ 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_VENID_MASK, devinfo);
+ if (vid == 0x9 || vid == 0xb) {
+ 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", &reg);
+ if (ret) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, ret, "Failed to parse reg property\n");
+ }
+
+ if (reg >= MT6370_MAX_LEDS) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, -EINVAL, "Error reg property number\n");
+ }
+
+ ret = fwnode_property_read_u32(child, "color", &color);
+ if (ret) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, ret, "Failed to parse color property\n");
+ }
+
+ if (color == LED_COLOR_ID_RGB || color == LED_COLOR_ID_MULTI)
+ reg = MT6370_VIRTUAL_MULTICOLOR;
+
+ if (priv->leds_active & BIT(reg)) {
+ fwnode_handle_put(child);
+ return dev_err_probe(dev, -EINVAL, "Duplicate reg property\n");
+ }
+
+ priv->leds_active |= BIT(reg);
+
+ led->index = reg;
+ led->priv = priv;
+
+ ret = mt6370_init_led_properties(dev, led, &init_data);
+ if (ret) {
+ fwnode_handle_put(child);
+ return ret;
+ }
+
+ ret = mt6370_led_register(dev, led, &init_data);
+ if (ret) {
+ fwnode_handle_put(child);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+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");
--
2.7.4