Jacek On 3/20/19 1:59 PM, Jacek Anaszewski wrote: > Hi Dan, > > I have one minor issue below. > > On 3/13/19 1:32 PM, Dan Murphy wrote: >> Introduce the Texas Instruments LM3532 White LED driver. >> The driver supports ALS configurability or manual brightness >> control. >> >> The driver also supports associating LED strings with specific >> control banks in a group or as individually controlled strings. >> >> Signed-off-by: Dan Murphy <dmurphy@xxxxxx> >> --- >> >> v4 - Updated code to DT doc changes appending "ti," to TI specific properties - >> https://lore.kernel.org/patchwork/patch/1050124/ >> >> v3 - Removed switch case for register setting in favor of an algorithim (v1 comment), >> https://lore.kernel.org/patchwork/patch/1049024/ >> v2 - Added look up tables for als_avg, als_imp and ramp times, fixed brightness >> control when ALS is in control, added property value checks to ensure the values >> are not out of bounds - https://lore.kernel.org/patchwork/patch/1048807/ >> >> drivers/leds/Kconfig | 10 + >> drivers/leds/Makefile | 1 + >> drivers/leds/leds-lm3532.c | 681 +++++++++++++++++++++++++++++++++++++ >> 3 files changed, 692 insertions(+) >> create mode 100644 drivers/leds/leds-lm3532.c >> >> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig >> index a72f97fca57b..da00b9ed5a5c 100644 >> --- a/drivers/leds/Kconfig >> +++ b/drivers/leds/Kconfig >> @@ -138,6 +138,16 @@ config LEDS_LM3530 >> controlled manually or using PWM input or using ambient >> light automatically. >> +config LEDS_LM3532 >> + tristate "LCD Backlight driver for LM3532" >> + depends on LEDS_CLASS >> + depends on I2C >> + help >> + This option enables support for the LCD backlight using >> + LM3532 ambient light sensor chip. This ALS chip can be >> + controlled manually or using PWM input or using ambient >> + light automatically. >> + >> config LEDS_LM3533 >> tristate "LED support for LM3533" >> depends on LEDS_CLASS >> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile >> index 4c1b0054f379..7a8b1f55d459 100644 >> --- a/drivers/leds/Makefile >> +++ b/drivers/leds/Makefile >> @@ -18,6 +18,7 @@ obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o >> obj-$(CONFIG_LEDS_CPCAP) += leds-cpcap.o >> obj-$(CONFIG_LEDS_LOCOMO) += leds-locomo.o >> obj-$(CONFIG_LEDS_LM3530) += leds-lm3530.o >> +obj-$(CONFIG_LEDS_LM3532) += leds-lm3532.o >> obj-$(CONFIG_LEDS_LM3533) += leds-lm3533.o >> obj-$(CONFIG_LEDS_LM3642) += leds-lm3642.o >> obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o >> diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c >> new file mode 100644 >> index 000000000000..e8a614d71469 >> --- /dev/null >> +++ b/drivers/leds/leds-lm3532.c >> @@ -0,0 +1,681 @@ >> +// SPDX-License-Identifier: GPL-2.0 >> +// TI LM3532 LED driver >> +// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ >> + >> +#include <linux/i2c.h> >> +#include <linux/leds.h> >> +#include <linux/slab.h> >> +#include <linux/regmap.h> >> +#include <linux/types.h> >> +#include <linux/regulator/consumer.h> >> +#include <linux/module.h> >> +#include <uapi/linux/uleds.h> >> +#include <linux/gpio/consumer.h> >> + >> +#define LM3532_NAME "lm3532-led" >> +#define LM3532_BL_MODE_MANUAL 0x00 >> +#define LM3532_BL_MODE_ALS 0x01 >> + >> +#define LM3532_REG_OUTPUT_CFG 0x10 >> +#define LM3532_REG_STARTSHUT_RAMP 0x11 >> +#define LM3532_REG_RT_RAMP 0x12 >> +#define LM3532_REG_PWM_A_CFG 0x13 >> +#define LM3532_REG_PWM_B_CFG 0x14 >> +#define LM3532_REG_PWM_C_CFG 0x15 >> +#define LM3532_REG_ZONE_CFG_A 0x16 >> +#define LM3532_REG_CTRL_A_BRT 0x17 >> +#define LM3532_REG_ZONE_CFG_B 0x18 >> +#define LM3532_REG_CTRL_B_BRT 0x19 >> +#define LM3532_REG_ZONE_CFG_C 0x1a >> +#define LM3532_REG_CTRL_C_BRT 0x1b >> +#define LM3532_REG_ENABLE 0x1d >> +#define LM3532_ALS_CONFIG 0x23 >> +#define LM3532_REG_ZN_0_HI 0x60 >> +#define LM3532_REG_ZN_0_LO 0x61 >> +#define LM3532_REG_ZN_1_HI 0x62 >> +#define LM3532_REG_ZN_1_LO 0x63 >> +#define LM3532_REG_ZN_2_HI 0x64 >> +#define LM3532_REG_ZN_2_LO 0x65 >> +#define LM3532_REG_ZN_3_HI 0x66 >> +#define LM3532_REG_ZN_3_LO 0x67 >> +#define LM3532_REG_MAX 0x7e >> + >> +/* Contorl Enable */ >> +#define LM3532_CTRL_A_ENABLE BIT(0) >> +#define LM3532_CTRL_B_ENABLE BIT(1) >> +#define LM3532_CTRL_C_ENABLE BIT(2) >> + >> +/* PWM Zone Control */ >> +#define LM3532_PWM_ZONE_MASK 0x7c >> +#define LM3532_PWM_ZONE_0_EN BIT(2) >> +#define LM3532_PWM_ZONE_1_EN BIT(3) >> +#define LM3532_PWM_ZONE_2_EN BIT(4) >> +#define LM3532_PWM_ZONE_3_EN BIT(5) >> +#define LM3532_PWM_ZONE_4_EN BIT(6) >> + >> +/* Brightness Configuration */ >> +#define LM3532_I2C_CTRL BIT(0) >> +#define LM3532_ALS_CTRL 0 >> +#define LM3532_LINEAR_MAP BIT(1) >> +#define LM3532_ZONE_MASK (BIT(2) | BIT(3) | BIT(4)) >> +#define LM3532_ZONE_0 0 >> +#define LM3532_ZONE_1 BIT(2) >> +#define LM3532_ZONE_2 BIT(3) >> +#define LM3532_ZONE_3 (BIT(2) | BIT(3)) >> +#define LM3532_ZONE_4 BIT(4) >> + >> +#define LM3532_ENABLE_ALS BIT(3) >> +#define LM3532_ALS_SEL_SHIFT 6 >> + >> +/* Zone Boundary Register */ >> +#define LM3532_ALS_WINDOW_mV 2000 >> +#define LM3532_ALS_ZB_MAX 4 >> +#define LM3532_ALS_OFFSET_mV 2 >> + >> +#define LM3532_CONTROL_A 0 >> +#define LM3532_CONTROL_B 1 >> +#define LM3532_CONTROL_C 2 >> +#define LM3532_MAX_CONTROL_BANKS 3 >> +#define LM3532_MAX_LED_STRINGS 3 >> + >> +#define LM3532_OUTPUT_CFG_MASK 0x3 >> +#define LM3532_BRT_VAL_ADJUST 8 >> +#define LM3532_RAMP_DOWN_SHIFT 3 >> + >> +#define LM3532_NUM_RAMP_VALS 8 >> +#define LM3532_NUM_AVG_VALS 8 >> +#define LM3532_NUM_IMP_VALS 32 >> + >> +/* >> + * struct lm3532_als_data >> + * @config - value of ALS configuration register >> + * @als1_imp_sel - value of ALS1 resistor select register >> + * @als2_imp_sel - value of ALS2 resistor select register >> + * @als_avrg_time - ALS averaging time >> + * @als_input_mode - ALS input mode for brightness control >> + * @als_vmin - Minimum ALS voltage >> + * @als_vmax - Maximum ALS voltage >> + * @zone_lo - values of ALS lo ZB(Zone Boundary) registers >> + * @zone_hi - values of ALS hi ZB(Zone Boundary) registers >> + */ >> +struct lm3532_als_data { >> + u8 config; >> + u8 als1_imp_sel; >> + u8 als2_imp_sel; >> + u8 als_avrg_time; >> + u8 als_input_mode; >> + u32 als_vmin; >> + u32 als_vmax; >> + u8 zones_lo[LM3532_ALS_ZB_MAX]; >> + u8 zones_hi[LM3532_ALS_ZB_MAX]; >> +}; >> + >> +/** >> + * struct lm3532_led >> + * @led_dev: led class device >> + * @priv - Pointer the device data structure >> + * @control_bank - Control bank the LED is associated to >> + * @mode - Mode of the LED string >> + * @num_leds - Number of LED strings are supported in this array >> + * @led_strings - The LED strings supported in this array >> + * @label - LED label >> + */ >> +struct lm3532_led { >> + struct led_classdev led_dev; >> + struct lm3532_data *priv; >> + >> + int control_bank; >> + int mode; >> + int num_leds; >> + u32 led_strings[LM3532_MAX_CONTROL_BANKS]; >> + char label[LED_MAX_NAME_SIZE]; >> +}; >> + >> +/** >> + * struct lm3532_data >> + * @enable_gpio - Hardware enable gpio >> + * @regulator: regulator >> + * @client: i2c client >> + * @regmap - Devices register map >> + * @dev - Pointer to the devices device struct >> + * @lock - Lock for reading/writing the device >> + * @als_data - Pointer to the als data struct >> + * @runtime_ramp_up - Runtime ramp up setting >> + * @runtime_ramp_down - Runtime ramp down setting >> + * @leds - Array of LED strings >> + */ >> +struct lm3532_data { >> + struct gpio_desc *enable_gpio; >> + struct regulator *regulator; >> + struct i2c_client *client; >> + struct regmap *regmap; >> + struct device *dev; >> + struct mutex lock; >> + >> + struct lm3532_als_data *als_data; >> + >> + u32 runtime_ramp_up; >> + u32 runtime_ramp_down; >> + >> + struct lm3532_led leds[]; >> +}; >> + >> +static const struct reg_default lm3532_reg_defs[] = { >> + {LM3532_REG_OUTPUT_CFG, 0xe4}, >> + {LM3532_REG_STARTSHUT_RAMP, 0xc0}, >> + {LM3532_REG_RT_RAMP, 0xc0}, >> + {LM3532_REG_PWM_A_CFG, 0x82}, >> + {LM3532_REG_PWM_B_CFG, 0x82}, >> + {LM3532_REG_PWM_C_CFG, 0x82}, >> + {LM3532_REG_ZONE_CFG_A, 0xf1}, >> + {LM3532_REG_CTRL_A_BRT, 0xf3}, >> + {LM3532_REG_ZONE_CFG_B, 0xf1}, >> + {LM3532_REG_CTRL_B_BRT, 0xf3}, >> + {LM3532_REG_ZONE_CFG_C, 0xf1}, >> + {LM3532_REG_CTRL_C_BRT, 0xf3}, >> + {LM3532_REG_ENABLE, 0xf8}, >> + {LM3532_ALS_CONFIG, 0x44}, >> + {LM3532_REG_ZN_0_HI, 0x35}, >> + {LM3532_REG_ZN_0_LO, 0x33}, >> + {LM3532_REG_ZN_1_HI, 0x6a}, >> + {LM3532_REG_ZN_1_LO, 0x66}, >> + {LM3532_REG_ZN_2_HI, 0xa1}, >> + {LM3532_REG_ZN_2_LO, 0x99}, >> + {LM3532_REG_ZN_3_HI, 0xdc}, >> + {LM3532_REG_ZN_3_LO, 0xcc}, >> +}; >> + >> +static const struct regmap_config lm3532_regmap_config = { >> + .reg_bits = 8, >> + .val_bits = 8, >> + >> + .max_register = LM3532_REG_MAX, >> + .reg_defaults = lm3532_reg_defs, >> + .num_reg_defaults = ARRAY_SIZE(lm3532_reg_defs), >> + .cache_type = REGCACHE_FLAT, >> +}; >> + >> +const static int als_imp_table[LM3532_NUM_IMP_VALS] = {37000, 18500, 12330, >> + 92500, 7400, 6170, 5290, >> + 4630, 4110, 3700, 3360, >> + 3080, 2850, 2640, 2440, >> + 2310, 2180, 2060, 1950, >> + 1850, 1760, 1680, 1610, >> + 1540, 1480, 1420, 1370, >> + 1320, 1280, 1230, 1190}; >> +static int lm3532_get_als_imp_index(int als_imped) >> +{ >> + int i; >> + >> + if (als_imped > als_imp_table[1]) >> + return 0; >> + >> + if (als_imped < als_imp_table[LM3532_NUM_IMP_VALS - 1]) >> + return LM3532_NUM_IMP_VALS - 1; >> + >> + for (i = 1; i < LM3532_NUM_IMP_VALS; i++) { >> + if (als_imped == als_imp_table[i]) >> + return i; >> + >> + /* Find an approximate index by looking up the table */ >> + if (als_imped < als_imp_table[i - 1] && >> + als_imped > als_imp_table[i]) { >> + if (als_imped - als_imp_table[i - 1] < >> + als_imp_table[i] - als_imped) >> + return i + 1; >> + else >> + return i; >> + } >> + } >> + >> + return -EINVAL; >> +} >> + >> +static int lm3532_get_index(const int table[], int size, int value) >> +{ >> + int i; >> + >> + for (i = 1; i < size; i++) { >> + if (value == table[i]) >> + return i; >> + >> + /* Find an approximate index by looking up the table */ >> + if (value > table[i - 1] && >> + value < table[i]) { >> + if (value - table[i - 1] < table[i] - value) >> + return i - 1; >> + else >> + return i; >> + } >> + } >> + >> + return -EINVAL; >> +} >> + >> +const static int als_avrg_table[LM3532_NUM_AVG_VALS] = {17920, 35840, 71680, >> + 1433360, 286720, 573440, >> + 1146880, 2293760}; >> +static int lm3532_get_als_avg_index(int avg_time) >> +{ >> + if (avg_time <= als_avrg_table[0]) >> + return 0; >> + >> + if (avg_time > als_avrg_table[LM3532_NUM_AVG_VALS - 1]) >> + return LM3532_NUM_AVG_VALS - 1; >> + >> + return lm3532_get_index(&als_avrg_table[0], LM3532_NUM_AVG_VALS, >> + avg_time); >> +} >> + >> +const static int ramp_table[LM3532_NUM_RAMP_VALS] = { 8, 1024, 2048, 4096, 8192, >> + 16384, 32768, 65536}; >> +static int lm3532_get_ramp_index(int ramp_time) >> +{ >> + if (ramp_time <= ramp_table[0]) >> + return 0; >> + >> + if (ramp_time > ramp_table[LM3532_NUM_RAMP_VALS - 1]) >> + return LM3532_NUM_RAMP_VALS - 1; >> + >> + return lm3532_get_index(&ramp_table[0], LM3532_NUM_RAMP_VALS, >> + ramp_time); >> +} >> + >> +static int lm3532_led_enable(struct lm3532_led *led_data) >> +{ >> + int ctrl_en_val = BIT(led_data->control_bank); >> + int ret; >> + >> + ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE, >> + ctrl_en_val, ctrl_en_val); >> + if (ret) { >> + dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret); >> + return ret; >> + } >> + >> + return regulator_enable(led_data->priv->regulator); >> +} >> + >> +static int lm3532_led_disable(struct lm3532_led *led_data) >> +{ >> + int ctrl_en_val = BIT(led_data->control_bank); >> + int ret; >> + >> + ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE, >> + ctrl_en_val, ~ctrl_en_val); >> + if (ret) { >> + dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret); >> + return ret; >> + } >> + >> + return regulator_disable(led_data->priv->regulator); >> +} >> + >> +static int lm3532_brightness_set(struct led_classdev *led_cdev, >> + enum led_brightness brt_val) >> +{ >> + struct lm3532_led *led = >> + container_of(led_cdev, struct lm3532_led, led_dev); >> + u8 brightness_reg; >> + int ret; >> + >> + mutex_lock(&led->priv->lock); >> + >> + if (led->mode == LM3532_BL_MODE_ALS) { >> + if (brt_val > LED_OFF) >> + ret = lm3532_led_enable(led); >> + else >> + ret = lm3532_led_disable(led); >> + >> + goto unlock; >> + } >> + >> + if (brt_val == LED_OFF) { >> + ret = lm3532_led_disable(led); >> + goto unlock; >> + } >> + >> + ret = lm3532_led_enable(led); >> + if (ret) >> + goto unlock; >> + >> + brightness_reg = LM3532_REG_CTRL_A_BRT + led->control_bank * 2; >> + brt_val = brt_val / LM3532_BRT_VAL_ADJUST; >> + >> + ret = regmap_write(led->priv->regmap, brightness_reg, brt_val); >> + >> +unlock: >> + mutex_unlock(&led->priv->lock); >> + return ret; >> +} >> + >> +static int lm3532_init_registers(struct lm3532_led *led) >> +{ >> + struct lm3532_data *drvdata = led->priv; >> + unsigned int runtime_ramp_val; >> + unsigned int output_cfg_val = 0; >> + unsigned int output_cfg_shift = 0; >> + unsigned int output_cfg_mask = 0; >> + int ret, i; >> + >> + for (i = 0; i < led->num_leds; i++) { >> + output_cfg_shift = led->led_strings[i] * 2; >> + output_cfg_val |= (led->control_bank << output_cfg_shift); >> + output_cfg_mask |= LM3532_OUTPUT_CFG_MASK << output_cfg_shift; >> + } >> + >> + ret = regmap_update_bits(drvdata->regmap, LM3532_REG_OUTPUT_CFG, >> + output_cfg_mask, output_cfg_val); >> + if (ret) >> + return ret; >> + >> + runtime_ramp_val = drvdata->runtime_ramp_up | >> + (drvdata->runtime_ramp_down << LM3532_RAMP_DOWN_SHIFT); >> + >> + return regmap_write(drvdata->regmap, LM3532_REG_RT_RAMP, >> + runtime_ramp_val); >> +} >> + >> +static int lm3532_als_configure(struct lm3532_data *priv, >> + struct lm3532_led *led) >> +{ >> + struct lm3532_als_data *als = priv->als_data; >> + u32 als_vmin, als_vmax, als_vstep; >> + int zone_reg = LM3532_REG_ZN_0_HI; >> + int brightnes_config_reg; >> + int ret; >> + int i; >> + >> + als_vmin = als->als_vmin; >> + als_vmax = als->als_vmax; >> + >> + als_vstep = (als_vmax - als_vmin) / ((LM3532_ALS_ZB_MAX + 1) * 2); >> + >> + for (i = 0; i < LM3532_ALS_ZB_MAX; i++) { >> + als->zones_lo[i] = ((als_vmin + als_vstep + (i * als_vstep)) * >> + LED_FULL) / 1000; >> + als->zones_hi[i] = ((als_vmin + LM3532_ALS_OFFSET_mV + >> + als_vstep + (i * als_vstep)) * LED_FULL) / 1000; >> + >> + zone_reg = LM3532_REG_ZN_0_HI + i * 2; >> + ret = regmap_write(priv->regmap, zone_reg, als->zones_lo[i]); >> + if (ret) >> + return ret; >> + >> + zone_reg += 1; >> + ret = regmap_write(priv->regmap, zone_reg, als->zones_hi[i]); >> + if (ret) >> + return ret; >> + } >> + >> + als->config = (als->als_avrg_time | (LM3532_ENABLE_ALS) | >> + (als->als_input_mode << LM3532_ALS_SEL_SHIFT)); >> + >> + ret = regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config); >> + if (ret) >> + return ret; >> + >> + brightnes_config_reg = LM3532_REG_ZONE_CFG_A + led->control_bank * 2; >> + >> + return regmap_update_bits(priv->regmap, brightnes_config_reg, >> + LM3532_I2C_CTRL, LM3532_ALS_CTRL); >> +} >> + >> +static int lm3532_parse_als(struct lm3532_data *priv) >> +{ >> + struct lm3532_als_data *als; >> + int als_avg_time; >> + int als_impedance; >> + int ret; >> + >> + als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL); >> + if (als == NULL) >> + return -ENOMEM; >> + >> + ret = device_property_read_u32(&priv->client->dev, "ti,als-vmin", >> + &als->als_vmin); >> + if (ret) >> + als->als_vmin = 0; >> + >> + ret = device_property_read_u32(&priv->client->dev, "ti,als-vmax", >> + &als->als_vmax); >> + if (ret) >> + als->als_vmax = LM3532_ALS_WINDOW_mV; >> + >> + if (als->als_vmax > LM3532_ALS_WINDOW_mV) { >> + ret = -EINVAL; >> + return ret; >> + } >> + >> + ret = device_property_read_u32(&priv->client->dev, "ti,als1-imp-sel", >> + &als_impedance); >> + if (ret) >> + als->als1_imp_sel = 0; >> + else >> + als->als1_imp_sel = lm3532_get_als_imp_index(als_impedance); >> + >> + ret = device_property_read_u32(&priv->client->dev, "ti,als2-imp-sel", >> + &als_impedance); >> + if (ret) >> + als->als2_imp_sel = 0; >> + else >> + als->als2_imp_sel = lm3532_get_als_imp_index(als_impedance); >> + >> + ret = device_property_read_u32(&priv->client->dev, "ti,als-avrg-time-us", >> + &als_avg_time); >> + if (ret) >> + als->als_avrg_time = 0; >> + else >> + als->als_avrg_time = lm3532_get_als_avg_index(als_avg_time); >> + >> + ret = device_property_read_u8(&priv->client->dev, "ti,als-input-mode", >> + &als->als_input_mode); >> + if (ret) >> + als->als_input_mode = 0; >> + >> + if (als->als_input_mode > LM3532_BL_MODE_ALS) { >> + ret = -EINVAL; >> + return ret; >> + } >> + >> + priv->als_data = als; >> + >> + return ret; >> +} >> + >> +static int lm3532_parse_node(struct lm3532_data *priv) >> +{ >> + struct fwnode_handle *child = NULL; >> + struct lm3532_led *led; >> + const char *name; >> + int control_bank; >> + u32 ramp_time; >> + size_t i = 0; >> + int ret; >> + >> + priv->enable_gpio = devm_gpiod_get_optional(&priv->client->dev, >> + "enable", GPIOD_OUT_LOW); >> + if (IS_ERR(priv->enable_gpio)) >> + priv->enable_gpio = NULL; >> + >> + priv->regulator = devm_regulator_get(&priv->client->dev, "vin"); >> + if (IS_ERR(priv->regulator)) >> + priv->regulator = NULL; >> + >> + ret = device_property_read_u32(&priv->client->dev, "ramp-up-us", >> + &ramp_time); >> + if (ret) >> + dev_info(&priv->client->dev, "ramp-up-ms property missing\n"); >> + else >> + priv->runtime_ramp_up = lm3532_get_ramp_index(ramp_time); >> + >> + ret = device_property_read_u32(&priv->client->dev, "ramp-down-us", >> + &ramp_time); >> + if (ret) >> + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); >> + else >> + priv->runtime_ramp_down = lm3532_get_ramp_index(ramp_time); >> + >> + device_for_each_child_node(priv->dev, child) { >> + led = &priv->leds[i]; >> + >> + ret = fwnode_property_read_u32(child, "reg", &control_bank); >> + if (ret) { >> + dev_err(&priv->client->dev, "reg property missing\n"); >> + fwnode_handle_put(child); >> + goto child_out; >> + } >> + >> + if (control_bank > LM3532_CONTROL_C) { >> + dev_err(&priv->client->dev, "Control bank invalid\n"); >> + continue; >> + } >> + >> + led->control_bank = control_bank; >> + >> + ret = fwnode_property_read_u32(child, "ti,led-mode", >> + &led->mode); >> + if (ret) { >> + dev_err(&priv->client->dev, "ti,led-mode property missing\n"); >> + fwnode_handle_put(child); >> + goto child_out; >> + } >> + >> + if (led->mode == LM3532_BL_MODE_ALS) { >> + ret = lm3532_parse_als(priv); >> + if (ret) >> + dev_err(&priv->client->dev, "Failed to parse als\n"); >> + else >> + lm3532_als_configure(priv, led); >> + } >> + >> + led->num_leds = fwnode_property_read_u32_array(child, >> + "led-sources", >> + NULL, 0); >> + >> + if (led->num_leds > LM3532_MAX_LED_STRINGS) { >> + dev_err(&priv->client->dev, "To many LED string defined\n"); >> + continue; >> + } >> + >> + ret = fwnode_property_read_u32_array(child, "led-sources", >> + led->led_strings, >> + led->num_leds); >> + if (ret) { >> + dev_err(&priv->client->dev, "led-sources property missing\n"); >> + fwnode_handle_put(child); >> + goto child_out; >> + } >> + >> + fwnode_property_read_string(child, "linux,default-trigger", >> + &led->led_dev.default_trigger); >> + >> + ret = fwnode_property_read_string(child, "label", &name); >> + if (ret) >> + snprintf(led->label, sizeof(led->label), >> + "%s::", priv->client->name); >> + else >> + snprintf(led->label, sizeof(led->label), >> + "%s:%s", priv->client->name, name); >> + >> + led->priv = priv; >> + led->led_dev.name = led->label; >> + led->led_dev.brightness_set_blocking = lm3532_brightness_set; >> + >> + ret = devm_led_classdev_register(priv->dev, &led->led_dev); >> + if (ret) { >> + dev_err(&priv->client->dev, "led register err: %d\n", >> + ret); >> + fwnode_handle_put(child); >> + goto child_out; >> + } >> + >> + lm3532_init_registers(led); >> + >> + i++; >> + } >> + >> +child_out: >> + return ret; >> +} >> + >> +static int lm3532_probe(struct i2c_client *client, >> + const struct i2c_device_id *id) >> +{ >> + struct lm3532_data *drvdata; >> + int ret = 0; >> + int count; >> + >> + count = device_get_child_node_count(&client->dev); >> + if (!count) { >> + dev_err(&client->dev, "LEDs are not defined in device tree!"); >> + return -ENODEV; >> + } >> + >> + drvdata = devm_kzalloc(&client->dev, struct_size(drvdata, leds, count), >> + GFP_KERNEL); >> + if (drvdata == NULL) >> + return -ENOMEM; >> + >> + drvdata->client = client; >> + drvdata->dev = &client->dev; >> + >> + drvdata->regmap = devm_regmap_init_i2c(client, &lm3532_regmap_config); >> + if (IS_ERR(drvdata->regmap)) { >> + ret = PTR_ERR(drvdata->regmap); >> + dev_err(&client->dev, "Failed to allocate register map: %d\n", >> + ret); >> + return ret; >> + } >> + >> + mutex_init(&drvdata->lock); >> + i2c_set_clientdata(client, drvdata); >> + >> + ret = lm3532_parse_node(drvdata); >> + if (ret) { >> + dev_err(&client->dev, "Failed to parse node\n"); >> + return ret; >> + } >> + >> + if (drvdata->enable_gpio) >> + gpiod_direction_output(drvdata->enable_gpio, 1); >> + >> + return ret; >> +} >> + >> +static int lm3532_remove(struct i2c_client *client) >> +{ >> + struct lm3532_data *drvdata = i2c_get_clientdata(client); > mutex_destroy(&drvdata->lock); > Ack. I give post v5 tomorrow. Dan >> + if (drvdata->enable_gpio) >> + gpiod_direction_output(drvdata->enable_gpio, 0); >> + >> + return 0; >> +} >> + >> +static const struct of_device_id of_lm3532_leds_match[] = { >> + { .compatible = "ti,lm3532", }, >> + {}, >> +}; >> +MODULE_DEVICE_TABLE(of, of_lm3532_leds_match); >> + >> +static const struct i2c_device_id lm3532_id[] = { >> + {LM3532_NAME, 0}, >> + {} >> +}; >> +MODULE_DEVICE_TABLE(i2c, lm3532_id); >> + >> +static struct i2c_driver lm3532_i2c_driver = { >> + .probe = lm3532_probe, >> + .remove = lm3532_remove, >> + .id_table = lm3532_id, >> + .driver = { >> + .name = LM3532_NAME, >> + .of_match_table = of_lm3532_leds_match, >> + }, >> +}; >> +module_i2c_driver(lm3532_i2c_driver); >> + >> +MODULE_DESCRIPTION("Back Light driver for LM3532"); >> +MODULE_LICENSE("GPL v2"); >> +MODULE_AUTHOR("Dan Murphy <dmurphy@xxxxxx>"); >> > -- ------------------ Dan Murphy
