| Message ID | 20190307220947.20057-4-dmurphy@ti.com |
|---|---|
| State | Changes Requested, archived |
| Headers | show |
| Series | [1/4] dt: lm3532: Add lm3532 dt doc and update ti_lmu doc | expand |
| Context | Check | Description |
|---|---|---|
| robh/checkpatch | warning | "total: 0 errors, 1 warnings, 690 lines checked" |
Hello On 3/7/19 4:09 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@ti.com> > --- > drivers/leds/Kconfig | 10 + > drivers/leds/Makefile | 1 + > drivers/leds/leds-lm3532.c | 595 +++++++++++++++++++++++++ > include/dt-bindings/leds/leds-lm3532.h | 72 +++ > 4 files changed, 678 insertions(+) > create mode 100644 drivers/leds/leds-lm3532.c > create mode 100644 include/dt-bindings/leds/leds-lm3532.h > After thinking about this dt header I am not happy about having it. I am thinking of removing this file completely and doing some calculations in the driver file for the impedance, averaging time and ramp times. I would still like to get comments on the rest of the code but in v2 the dt bindings header will go away. Dan <snip>
Hi Dan, Thank your for the patch. I have some comments below, please take a look. On 3/7/19 11:09 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@ti.com> > --- > drivers/leds/Kconfig | 10 + > drivers/leds/Makefile | 1 + > drivers/leds/leds-lm3532.c | 595 +++++++++++++++++++++++++ > include/dt-bindings/leds/leds-lm3532.h | 72 +++ > 4 files changed, 678 insertions(+) > create mode 100644 drivers/leds/leds-lm3532.c > create mode 100644 include/dt-bindings/leds/leds-lm3532.h > > 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..005478359d06 > --- /dev/null > +++ b/drivers/leds/leds-lm3532.c > @@ -0,0 +1,595 @@ > +// 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/input.h> > +#include <linux/types.h> > +#include <linux/regulator/consumer.h> > +#include <linux/module.h> > +#include <uapi/linux/uleds.h> > +#include <linux/gpio/consumer.h> > + > +#include <dt-bindings/leds/leds-lm3532.h> > + > +#define LM3532_NAME "lm3532-led" > + > +#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_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 > + > +/* > + * 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, > +}; > + > +static int lm3532_led_enable(struct lm3532_led *led_data) > +{ > + int ctrl_en_val; > + int ret; > + > + switch (led_data->control_bank) { > + case LM3532_CONTROL_A: > + ctrl_en_val = LM3532_CTRL_A_ENABLE; > + break; > + case LM3532_CONTROL_B: > + ctrl_en_val = LM3532_CTRL_B_ENABLE; > + break; > + case LM3532_CONTROL_C: > + ctrl_en_val = LM3532_CTRL_C_ENABLE; > + break; > + default: > + dev_err(led_data->priv->dev, "Invalid control bank\n"); If control_bank was validated in lm3532_parse_node(), then you wouldn't have to take into account this option here. Besides, you don't need this switch statement, but can easily calculate ctrl_en_val: #define LM3532_GET_CTRL_BANK_EN_VAL(bank_id) BIT(bank_id) > + return -EINVAL; > + }; > + > + 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; > + int ret; > + > + switch (led_data->control_bank) { > + case LM3532_CONTROL_A: > + ctrl_en_val = LM3532_CTRL_A_ENABLE; > + break; > + case LM3532_CONTROL_B: > + ctrl_en_val = LM3532_CTRL_B_ENABLE; > + break; > + case LM3532_CONTROL_C: > + ctrl_en_val = LM3532_CTRL_C_ENABLE; > + break; > + default: > + dev_err(led_data->priv->dev, "Invalid control bank\n"); > + return -EINVAL; > + }; Ditto. > + > + 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 brightnes_reg; > + int ret; > + > + mutex_lock(&led->priv->lock); > + > + if (led->mode == LM3532_BL_MODE_ALS) { > + ret = 0; > + goto unlock; > + } > + > + switch (led->control_bank) { > + case LM3532_CONTROL_A: > + brightnes_reg = LM3532_REG_CTRL_A_BRT; > + break; > + case LM3532_CONTROL_B: > + brightnes_reg = LM3532_REG_CTRL_B_BRT; > + break; > + case LM3532_CONTROL_C: > + brightnes_reg = LM3532_REG_CTRL_C_BRT; > + break; > + default: > + dev_err(led->priv->dev, "Invalid control bank\n"); > + ret = -EINVAL; > + goto unlock; > + }; Similarly here. use following macro: #define LM3532_GET_CTRL_BANK_BRT_REG (bank_id) BIT((LM3532_REG_CTRL_A_BRT + bank_id*2)) > + if (brt_val == LED_OFF) { > + ret = lm3532_led_disable(led); > + goto unlock; > + } > + > + lm3532_led_enable(led); > + brt_val = brt_val / LM3532_BRT_VAL_ADJUST; > + > + ret = regmap_write(led->priv->regmap, brightnes_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); > + > + 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_als_data *als = priv->als_data; > + u32 als_vmin, als_vmax, als_vstep; > + int zone_reg = LM3532_REG_ZN_0_HI; > + 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)); > + > + return regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config); > +} > + > +static int lm3532_parse_als(struct lm3532_data *priv) > +{ > + struct lm3532_als_data *als; > + int ret; > + > + als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL); > + if (als == NULL) > + return -ENOMEM; > + > + ret = device_property_read_u32(&priv->client->dev, "als-vmin", > + &als->als_vmin); > + if (ret) > + als->als_vmin = 0; > + > + ret = device_property_read_u32(&priv->client->dev, "als-vmax", > + &als->als_vmax); > + if (ret) > + als->als_vmax = LM3532_ALS_WINDOW_mV; > + > + ret = device_property_read_u8(&priv->client->dev, "als1-imp-sel", > + &als->als1_imp_sel); > + if (ret) > + als->als1_imp_sel = 0; > + > + ret = device_property_read_u8(&priv->client->dev, "als2-imp-sel", > + &als->als2_imp_sel); > + if (ret) > + als->als2_imp_sel = 0; > + > + ret = device_property_read_u8(&priv->client->dev, "als-avrg-time", > + &als->als_avrg_time); > + if (ret) > + als->als_avrg_time = 0; > + > + ret = device_property_read_u8(&priv->client->dev, "als-input-mode", > + &als->als_input_mode); > + if (ret) > + als->als_input_mode = 0; > + > + 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; > + 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-down-ms", > + &priv->runtime_ramp_up); > + if (ret) > + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); > + > + ret = device_property_read_u32(&priv->client->dev, "ramp-down-ms", > + &priv->runtime_ramp_down); > + if (ret) > + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); > + > + 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->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() is missing here. > + 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@ti.com>"); > diff --git a/include/dt-bindings/leds/leds-lm3532.h b/include/dt-bindings/leds/leds-lm3532.h > new file mode 100644 > index 000000000000..724dbc0cb395 > --- /dev/null > +++ b/include/dt-bindings/leds/leds-lm3532.h This should go in a separate patch, with DT bindings - see checkpatch.pl complaint. > @@ -0,0 +1,72 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* TI LM3532 LED driver > + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ > + */ > + > +#ifndef __DT_BINDINGS_LEDS_LM3532_H > +#define __DT_BINDINGS_LEDS_LM3532_H > + > +#define LM3532_BL_MODE_MANUAL 0x00 /* "man" */ > +#define LM3532_BL_MODE_ALS 0x01 /* "als" */ > + > +/* ALS Resistor Select */ > +#define LM3532_IMP_HIGH 0x00 > +#define LM3532_IMP_37K 0x01 > +#define LM3532_IMP_18_5K 0x02 > +#define LM3532_IMP_12_33K 0x03 > +#define LM3532_IMP_9_25K 0x04 > +#define LM3532_IMP_7_4K 0x05 > +#define LM3532_IMP_6_17K 0x06 > +#define LM3532_IMP_5_29K 0x07 > +#define LM3532_IMP_4_63K 0x08 > +#define LM3532_IMP_4_11K 0x09 > +#define LM3532_IMP_3_7K 0x0a > +#define LM3532_IMP_3_36K 0x0b > +#define LM3532_IMP_3_08K 0x0c > +#define LM3532_IMP_2_85K 0x0d > +#define LM3532_IMP_2_64K 0x0e > +#define LM3532_IMP_2_44K 0x0f > +#define LM3532_IMP_2_31K 0x10 > +#define LM3532_IMP_2_18K 0x11 > +#define LM3532_IMP_2_06K 0x12 > +#define LM3532_IMP_1_95K 0x13 > +#define LM3532_IMP_1_85K 0x14 > +#define LM3532_IMP_1_76K 0x15 > +#define LM3532_IMP_1_68K 0x16 > +#define LM3532_IMP_1_61K 0x17 > +#define LM3532_IMP_1_54K 0x18 > +#define LM3532_IMP_1_48K 0x19 > +#define LM3532_IMP_1_42K 0x1a > +#define LM3532_IMP_1_37K 0x1b > +#define LM3532_IMP_1_32K 0x1c > +#define LM3532_IMP_1_28K 0x1d > +#define LM3532_IMP_1_23K 0x1e > +#define LM3532_IMP_1_19K 0x1f > + > +/* ALS Averaging Time */ > +#define LM3532_ALS_AVRG_TIME_17_92ms 0x00 > +#define LM3532_ALS_AVRG_TIME_35_84ms 0x01 > +#define LM3532_ALS_AVRG_TIME_71_68ms 0x02 > +#define LM3532_ALS_AVRG_TIME_143_36ms 0x03 > +#define LM3532_ALS_AVRG_TIME_286_72ms 0x04 > +#define LM3532_ALS_AVRG_TIME_573_44ms 0x05 > +#define LM3532_ALS_AVRG_TIME_1146_88ms 0x06 > +#define LM3532_ALS_AVRG_TIME_2293_76ms 0x07 > + > +/* ALS input select */ > +#define LM3532_ALS_INPUT_AVRG 0x00 /* ALS1 and ALS2 input average */ > +#define LM3532_ALS_INPUT_ALS1 0x01 /* ALS1 Input */ > +#define LM3532_ALS_INPUT_ALS2 0x02 /* ALS2 Input */ > +#define LM3532_ALS_INPUT_CEIL 0x03 /* Max of ALS1 and ALS2 */ > + > +/* Ramp Times */ > +#define LM3532_RAMP_8us 0x00 > +#define LM3532_RAMP_1024us 0x01 > +#define LM3532_RAMP_2048us 0x02 > +#define LM3532_RAMP_4096us 0x03 > +#define LM3532_RAMP_8192us 0x04 > +#define LM3532_RAMP_16384us 0x05 > +#define LM3532_RAMP_32768us 0x06 > +#define LM3532_RAMP_65536us 0x07 > + > +#endif /* __DT_BINDINGS_LEDS_LM3532_H */ >
Jacek On 3/10/19 2:49 PM, Jacek Anaszewski wrote: > Hi Dan, > > Thank your for the patch. > > I have some comments below, please take a look. > Thanks for the review. I have pushed v2 with some code changes but those changes that were made seem to be outside your comments. So I will implemnt these comments in v3. > On 3/7/19 11:09 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@ti.com> >> --- >> drivers/leds/Kconfig | 10 + >> drivers/leds/Makefile | 1 + >> drivers/leds/leds-lm3532.c | 595 +++++++++++++++++++++++++ >> include/dt-bindings/leds/leds-lm3532.h | 72 +++ >> 4 files changed, 678 insertions(+) >> create mode 100644 drivers/leds/leds-lm3532.c >> create mode 100644 include/dt-bindings/leds/leds-lm3532.h >> >> 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..005478359d06 >> --- /dev/null >> +++ b/drivers/leds/leds-lm3532.c >> @@ -0,0 +1,595 @@ >> +// 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/input.h> >> +#include <linux/types.h> >> +#include <linux/regulator/consumer.h> >> +#include <linux/module.h> >> +#include <uapi/linux/uleds.h> >> +#include <linux/gpio/consumer.h> >> + >> +#include <dt-bindings/leds/leds-lm3532.h> >> + >> +#define LM3532_NAME "lm3532-led" >> + >> +#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_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 >> + >> +/* >> + * 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, >> +}; >> + >> +static int lm3532_led_enable(struct lm3532_led *led_data) >> +{ >> + int ctrl_en_val; >> + int ret; >> + >> + switch (led_data->control_bank) { >> + case LM3532_CONTROL_A: >> + ctrl_en_val = LM3532_CTRL_A_ENABLE; >> + break; >> + case LM3532_CONTROL_B: >> + ctrl_en_val = LM3532_CTRL_B_ENABLE; >> + break; >> + case LM3532_CONTROL_C: >> + ctrl_en_val = LM3532_CTRL_C_ENABLE; >> + break; >> + default: >> + dev_err(led_data->priv->dev, "Invalid control bank\n"); > > If control_bank was validated in lm3532_parse_node(), then you wouldn't > have to take into account this option here. > > Besides, you don't need this switch statement, but can easily calculate > ctrl_en_val: > > #define LM3532_GET_CTRL_BANK_EN_VAL(bank_id) BIT(bank_id) > Ack. Probably don't even need the macro for this. ctrl_en_val = BIT(led_data->control_bank); >> + return -EINVAL; >> + }; >> + >> + 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; >> + int ret; >> + >> + switch (led_data->control_bank) { >> + case LM3532_CONTROL_A: >> + ctrl_en_val = LM3532_CTRL_A_ENABLE; >> + break; >> + case LM3532_CONTROL_B: >> + ctrl_en_val = LM3532_CTRL_B_ENABLE; >> + break; >> + case LM3532_CONTROL_C: >> + ctrl_en_val = LM3532_CTRL_C_ENABLE; >> + break; >> + default: >> + dev_err(led_data->priv->dev, "Invalid control bank\n"); >> + return -EINVAL; >> + }; > > Ditto. > Ack Same as above >> + >> + 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 brightnes_reg; >> + int ret; >> + >> + mutex_lock(&led->priv->lock); >> + >> + if (led->mode == LM3532_BL_MODE_ALS) { >> + ret = 0; >> + goto unlock; >> + } >> + >> + switch (led->control_bank) { >> + case LM3532_CONTROL_A: >> + brightnes_reg = LM3532_REG_CTRL_A_BRT; >> + break; >> + case LM3532_CONTROL_B: >> + brightnes_reg = LM3532_REG_CTRL_B_BRT; >> + break; >> + case LM3532_CONTROL_C: >> + brightnes_reg = LM3532_REG_CTRL_C_BRT; >> + break; >> + default: >> + dev_err(led->priv->dev, "Invalid control bank\n"); >> + ret = -EINVAL; >> + goto unlock; >> + }; > > Similarly here. use following macro: > > #define LM3532_GET_CTRL_BANK_BRT_REG (bank_id) BIT((LM3532_REG_CTRL_A_BRT + bank_id*2)) > Ack. Probably don't need a macro since it is only used once. brightness_reg = LM3532_REG_CTRL_A_BRT + led->control_bank * 2 >> + if (brt_val == LED_OFF) { >> + ret = lm3532_led_disable(led); >> + goto unlock; >> + } >> + >> + lm3532_led_enable(led); >> + brt_val = brt_val / LM3532_BRT_VAL_ADJUST; >> + >> + ret = regmap_write(led->priv->regmap, brightnes_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); >> + >> + 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_als_data *als = priv->als_data; >> + u32 als_vmin, als_vmax, als_vstep; >> + int zone_reg = LM3532_REG_ZN_0_HI; >> + 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)); >> + >> + return regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config); >> +} >> + >> +static int lm3532_parse_als(struct lm3532_data *priv) >> +{ >> + struct lm3532_als_data *als; >> + int ret; >> + >> + als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL); >> + if (als == NULL) >> + return -ENOMEM; >> + >> + ret = device_property_read_u32(&priv->client->dev, "als-vmin", >> + &als->als_vmin); >> + if (ret) >> + als->als_vmin = 0; >> + >> + ret = device_property_read_u32(&priv->client->dev, "als-vmax", >> + &als->als_vmax); >> + if (ret) >> + als->als_vmax = LM3532_ALS_WINDOW_mV; >> + >> + ret = device_property_read_u8(&priv->client->dev, "als1-imp-sel", >> + &als->als1_imp_sel); >> + if (ret) >> + als->als1_imp_sel = 0; >> + >> + ret = device_property_read_u8(&priv->client->dev, "als2-imp-sel", >> + &als->als2_imp_sel); >> + if (ret) >> + als->als2_imp_sel = 0; >> + >> + ret = device_property_read_u8(&priv->client->dev, "als-avrg-time", >> + &als->als_avrg_time); >> + if (ret) >> + als->als_avrg_time = 0; >> + >> + ret = device_property_read_u8(&priv->client->dev, "als-input-mode", >> + &als->als_input_mode); >> + if (ret) >> + als->als_input_mode = 0; >> + >> + 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; >> + 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-down-ms", >> + &priv->runtime_ramp_up); >> + if (ret) >> + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); >> + >> + ret = device_property_read_u32(&priv->client->dev, "ramp-down-ms", >> + &priv->runtime_ramp_down); >> + if (ret) >> + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); >> + >> + 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->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() is missing here. Ack > >> + 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@ti.com>"); >> diff --git a/include/dt-bindings/leds/leds-lm3532.h b/include/dt-bindings/leds/leds-lm3532.h >> new file mode 100644 >> index 000000000000..724dbc0cb395 >> --- /dev/null >> +++ b/include/dt-bindings/leds/leds-lm3532.h > > This should go in a separate patch, with DT bindings - see checkpatch.pl > complaint. > I have removed this in v2 of the next patchset. Dan >> @@ -0,0 +1,72 @@ >> +/* SPDX-License-Identifier: GPL-2.0 */ >> +/* TI LM3532 LED driver >> + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ >> + */ >> + >> +#ifndef __DT_BINDINGS_LEDS_LM3532_H >> +#define __DT_BINDINGS_LEDS_LM3532_H >> + >> +#define LM3532_BL_MODE_MANUAL 0x00 /* "man" */ >> +#define LM3532_BL_MODE_ALS 0x01 /* "als" */ >> + >> +/* ALS Resistor Select */ >> +#define LM3532_IMP_HIGH 0x00 >> +#define LM3532_IMP_37K 0x01 >> +#define LM3532_IMP_18_5K 0x02 >> +#define LM3532_IMP_12_33K 0x03 >> +#define LM3532_IMP_9_25K 0x04 >> +#define LM3532_IMP_7_4K 0x05 >> +#define LM3532_IMP_6_17K 0x06 >> +#define LM3532_IMP_5_29K 0x07 >> +#define LM3532_IMP_4_63K 0x08 >> +#define LM3532_IMP_4_11K 0x09 >> +#define LM3532_IMP_3_7K 0x0a >> +#define LM3532_IMP_3_36K 0x0b >> +#define LM3532_IMP_3_08K 0x0c >> +#define LM3532_IMP_2_85K 0x0d >> +#define LM3532_IMP_2_64K 0x0e >> +#define LM3532_IMP_2_44K 0x0f >> +#define LM3532_IMP_2_31K 0x10 >> +#define LM3532_IMP_2_18K 0x11 >> +#define LM3532_IMP_2_06K 0x12 >> +#define LM3532_IMP_1_95K 0x13 >> +#define LM3532_IMP_1_85K 0x14 >> +#define LM3532_IMP_1_76K 0x15 >> +#define LM3532_IMP_1_68K 0x16 >> +#define LM3532_IMP_1_61K 0x17 >> +#define LM3532_IMP_1_54K 0x18 >> +#define LM3532_IMP_1_48K 0x19 >> +#define LM3532_IMP_1_42K 0x1a >> +#define LM3532_IMP_1_37K 0x1b >> +#define LM3532_IMP_1_32K 0x1c >> +#define LM3532_IMP_1_28K 0x1d >> +#define LM3532_IMP_1_23K 0x1e >> +#define LM3532_IMP_1_19K 0x1f >> + >> +/* ALS Averaging Time */ >> +#define LM3532_ALS_AVRG_TIME_17_92ms 0x00 >> +#define LM3532_ALS_AVRG_TIME_35_84ms 0x01 >> +#define LM3532_ALS_AVRG_TIME_71_68ms 0x02 >> +#define LM3532_ALS_AVRG_TIME_143_36ms 0x03 >> +#define LM3532_ALS_AVRG_TIME_286_72ms 0x04 >> +#define LM3532_ALS_AVRG_TIME_573_44ms 0x05 >> +#define LM3532_ALS_AVRG_TIME_1146_88ms 0x06 >> +#define LM3532_ALS_AVRG_TIME_2293_76ms 0x07 >> + >> +/* ALS input select */ >> +#define LM3532_ALS_INPUT_AVRG 0x00 /* ALS1 and ALS2 input average */ >> +#define LM3532_ALS_INPUT_ALS1 0x01 /* ALS1 Input */ >> +#define LM3532_ALS_INPUT_ALS2 0x02 /* ALS2 Input */ >> +#define LM3532_ALS_INPUT_CEIL 0x03 /* Max of ALS1 and ALS2 */ >> + >> +/* Ramp Times */ >> +#define LM3532_RAMP_8us 0x00 >> +#define LM3532_RAMP_1024us 0x01 >> +#define LM3532_RAMP_2048us 0x02 >> +#define LM3532_RAMP_4096us 0x03 >> +#define LM3532_RAMP_8192us 0x04 >> +#define LM3532_RAMP_16384us 0x05 >> +#define LM3532_RAMP_32768us 0x06 >> +#define LM3532_RAMP_65536us 0x07 >> + >> +#endif /* __DT_BINDINGS_LEDS_LM3532_H */ >> >
Dan, One more thing I forgot to mention before. On 3/11/19 12:36 PM, Dan Murphy wrote: > Jacek [...] > >>> @@ -0,0 +1,72 @@ >>> +/* SPDX-License-Identifier: GPL-2.0 */ >>> +/* TI LM3532 LED driver >>> + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ >>> + */ Let's have "//" comments here. >>> +#ifndef __DT_BINDINGS_LEDS_LM3532_H >>> +#define __DT_BINDINGS_LEDS_LM3532_H >>> + >>> +#define LM3532_BL_MODE_MANUAL 0x00 /* "man" */ >>> +#define LM3532_BL_MODE_ALS 0x01 /* "als" */ >>> + >>> +/* ALS Resistor Select */ >>> +#define LM3532_IMP_HIGH 0x00 >>> +#define LM3532_IMP_37K 0x01 >>> +#define LM3532_IMP_18_5K 0x02 >>> +#define LM3532_IMP_12_33K 0x03 >>> +#define LM3532_IMP_9_25K 0x04 >>> +#define LM3532_IMP_7_4K 0x05 >>> +#define LM3532_IMP_6_17K 0x06 >>> +#define LM3532_IMP_5_29K 0x07 >>> +#define LM3532_IMP_4_63K 0x08 >>> +#define LM3532_IMP_4_11K 0x09 >>> +#define LM3532_IMP_3_7K 0x0a >>> +#define LM3532_IMP_3_36K 0x0b >>> +#define LM3532_IMP_3_08K 0x0c >>> +#define LM3532_IMP_2_85K 0x0d >>> +#define LM3532_IMP_2_64K 0x0e >>> +#define LM3532_IMP_2_44K 0x0f >>> +#define LM3532_IMP_2_31K 0x10 >>> +#define LM3532_IMP_2_18K 0x11 >>> +#define LM3532_IMP_2_06K 0x12 >>> +#define LM3532_IMP_1_95K 0x13 >>> +#define LM3532_IMP_1_85K 0x14 >>> +#define LM3532_IMP_1_76K 0x15 >>> +#define LM3532_IMP_1_68K 0x16 >>> +#define LM3532_IMP_1_61K 0x17 >>> +#define LM3532_IMP_1_54K 0x18 >>> +#define LM3532_IMP_1_48K 0x19 >>> +#define LM3532_IMP_1_42K 0x1a >>> +#define LM3532_IMP_1_37K 0x1b >>> +#define LM3532_IMP_1_32K 0x1c >>> +#define LM3532_IMP_1_28K 0x1d >>> +#define LM3532_IMP_1_23K 0x1e >>> +#define LM3532_IMP_1_19K 0x1f >>> + >>> +/* ALS Averaging Time */ >>> +#define LM3532_ALS_AVRG_TIME_17_92ms 0x00 >>> +#define LM3532_ALS_AVRG_TIME_35_84ms 0x01 >>> +#define LM3532_ALS_AVRG_TIME_71_68ms 0x02 >>> +#define LM3532_ALS_AVRG_TIME_143_36ms 0x03 >>> +#define LM3532_ALS_AVRG_TIME_286_72ms 0x04 >>> +#define LM3532_ALS_AVRG_TIME_573_44ms 0x05 >>> +#define LM3532_ALS_AVRG_TIME_1146_88ms 0x06 >>> +#define LM3532_ALS_AVRG_TIME_2293_76ms 0x07 >>> + >>> +/* ALS input select */ >>> +#define LM3532_ALS_INPUT_AVRG 0x00 /* ALS1 and ALS2 input average */ >>> +#define LM3532_ALS_INPUT_ALS1 0x01 /* ALS1 Input */ >>> +#define LM3532_ALS_INPUT_ALS2 0x02 /* ALS2 Input */ >>> +#define LM3532_ALS_INPUT_CEIL 0x03 /* Max of ALS1 and ALS2 */ >>> + >>> +/* Ramp Times */ >>> +#define LM3532_RAMP_8us 0x00 >>> +#define LM3532_RAMP_1024us 0x01 >>> +#define LM3532_RAMP_2048us 0x02 >>> +#define LM3532_RAMP_4096us 0x03 >>> +#define LM3532_RAMP_8192us 0x04 >>> +#define LM3532_RAMP_16384us 0x05 >>> +#define LM3532_RAMP_32768us 0x06 >>> +#define LM3532_RAMP_65536us 0x07 >>> + >>> +#endif /* __DT_BINDINGS_LEDS_LM3532_H */ >>> >> > >
Jacek On 3/11/19 12:22 PM, Jacek Anaszewski wrote: > Dan, > > One more thing I forgot to mention before. > > On 3/11/19 12:36 PM, Dan Murphy wrote: >> Jacek > [...] >> >>>> @@ -0,0 +1,72 @@ >>>> +/* SPDX-License-Identifier: GPL-2.0 */ >>>> +/* TI LM3532 LED driver >>>> + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ >>>> + */ > > Let's have "//" comments here. > Like I said earlier in v2 this header went away. And checkpatch takes issue with // in headers. Unless they have removed that requirement. Dan >>>> +#ifndef __DT_BINDINGS_LEDS_LM3532_H >>>> +#define __DT_BINDINGS_LEDS_LM3532_H >>>> + >>>> +#define LM3532_BL_MODE_MANUAL 0x00 /* "man" */ >>>> +#define LM3532_BL_MODE_ALS 0x01 /* "als" */ >>>> + >>>> +/* ALS Resistor Select */ >>>> +#define LM3532_IMP_HIGH 0x00 >>>> +#define LM3532_IMP_37K 0x01 >>>> +#define LM3532_IMP_18_5K 0x02 >>>> +#define LM3532_IMP_12_33K 0x03 >>>> +#define LM3532_IMP_9_25K 0x04 >>>> +#define LM3532_IMP_7_4K 0x05 >>>> +#define LM3532_IMP_6_17K 0x06 >>>> +#define LM3532_IMP_5_29K 0x07 >>>> +#define LM3532_IMP_4_63K 0x08 >>>> +#define LM3532_IMP_4_11K 0x09 >>>> +#define LM3532_IMP_3_7K 0x0a >>>> +#define LM3532_IMP_3_36K 0x0b >>>> +#define LM3532_IMP_3_08K 0x0c >>>> +#define LM3532_IMP_2_85K 0x0d >>>> +#define LM3532_IMP_2_64K 0x0e >>>> +#define LM3532_IMP_2_44K 0x0f >>>> +#define LM3532_IMP_2_31K 0x10 >>>> +#define LM3532_IMP_2_18K 0x11 >>>> +#define LM3532_IMP_2_06K 0x12 >>>> +#define LM3532_IMP_1_95K 0x13 >>>> +#define LM3532_IMP_1_85K 0x14 >>>> +#define LM3532_IMP_1_76K 0x15 >>>> +#define LM3532_IMP_1_68K 0x16 >>>> +#define LM3532_IMP_1_61K 0x17 >>>> +#define LM3532_IMP_1_54K 0x18 >>>> +#define LM3532_IMP_1_48K 0x19 >>>> +#define LM3532_IMP_1_42K 0x1a >>>> +#define LM3532_IMP_1_37K 0x1b >>>> +#define LM3532_IMP_1_32K 0x1c >>>> +#define LM3532_IMP_1_28K 0x1d >>>> +#define LM3532_IMP_1_23K 0x1e >>>> +#define LM3532_IMP_1_19K 0x1f >>>> + >>>> +/* ALS Averaging Time */ >>>> +#define LM3532_ALS_AVRG_TIME_17_92ms 0x00 >>>> +#define LM3532_ALS_AVRG_TIME_35_84ms 0x01 >>>> +#define LM3532_ALS_AVRG_TIME_71_68ms 0x02 >>>> +#define LM3532_ALS_AVRG_TIME_143_36ms 0x03 >>>> +#define LM3532_ALS_AVRG_TIME_286_72ms 0x04 >>>> +#define LM3532_ALS_AVRG_TIME_573_44ms 0x05 >>>> +#define LM3532_ALS_AVRG_TIME_1146_88ms 0x06 >>>> +#define LM3532_ALS_AVRG_TIME_2293_76ms 0x07 >>>> + >>>> +/* ALS input select */ >>>> +#define LM3532_ALS_INPUT_AVRG 0x00 /* ALS1 and ALS2 input average */ >>>> +#define LM3532_ALS_INPUT_ALS1 0x01 /* ALS1 Input */ >>>> +#define LM3532_ALS_INPUT_ALS2 0x02 /* ALS2 Input */ >>>> +#define LM3532_ALS_INPUT_CEIL 0x03 /* Max of ALS1 and ALS2 */ >>>> + >>>> +/* Ramp Times */ >>>> +#define LM3532_RAMP_8us 0x00 >>>> +#define LM3532_RAMP_1024us 0x01 >>>> +#define LM3532_RAMP_2048us 0x02 >>>> +#define LM3532_RAMP_4096us 0x03 >>>> +#define LM3532_RAMP_8192us 0x04 >>>> +#define LM3532_RAMP_16384us 0x05 >>>> +#define LM3532_RAMP_32768us 0x06 >>>> +#define LM3532_RAMP_65536us 0x07 >>>> + >>>> +#endif /* __DT_BINDINGS_LEDS_LM3532_H */ >>>> >>> >> >> >
On Mon, 2019-03-11 at 12:24 -0500, Dan Murphy wrote: > checkpatch takes issue with // in headers. > Unless they have removed that requirement. Awhile ago... commit dadf680de3c2eb4cba9840619991eda0cfe98778 Author: Joe Perches <joe@perches.com> Date: Tue Aug 2 14:04:33 2016 -0700 checkpatch: allow c99 style // comments Sanitise the lines that contain c99 comments so that the error doesn't get emitted. Link: http://lkml.kernel.org/r/d4d22c34ad7bcc1bceb52f0742f76b7a6d585235.1468368420.git.joe@perches.com Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Thanks Joe On 3/11/19 12:30 PM, Joe Perches wrote: > On Mon, 2019-03-11 at 12:24 -0500, Dan Murphy wrote: >> checkpatch takes issue with // in headers. >> Unless they have removed that requirement. > > Awhile ago... > I guess I was referring to this SPDX warning WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 #1: FILE: drivers/net/can/m_can/m_can.h:1: +//SPDX-License-Identifier: GPL-2.0 > commit dadf680de3c2eb4cba9840619991eda0cfe98778 > Author: Joe Perches <joe@perches.com> > Date: Tue Aug 2 14:04:33 2016 -0700 > > checkpatch: allow c99 style // comments > > Sanitise the lines that contain c99 comments so that the error doesn't > get emitted. > > Link: http://lkml.kernel.org/r/d4d22c34ad7bcc1bceb52f0742f76b7a6d585235.1468368420.git.joe@perches.com > Signed-off-by: Joe Perches <joe@perches.com> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> >
On Mon, 2019-03-11 at 12:47 -0500, Dan Murphy wrote: > On 3/11/19 12:30 PM, Joe Perches wrote: > > On Mon, 2019-03-11 at 12:24 -0500, Dan Murphy wrote: > > > checkpatch takes issue with // in headers. > > > Unless they have removed that requirement. [] > I guess I was referring to this SPDX warning > > WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 > #1: FILE: drivers/net/can/m_can/m_can.h:1: > +//SPDX-License-Identifier: GPL-2.0 The general form uses a space after the // And much more recently: commit fdf13693d370653013eec3bc7f80a3f535001bf0 Author: Joe Perches <joe@perches.com> Date: Thu Mar 7 16:28:32 2019 -0800 checkpatch: verify SPDX comment style Using SPDX commenting style // or /* is specified for various file types in Documentation/process/license-rules.rst so add an appropriate test for .[chsS] files because many proposed file additions and patches do not use the correct style.
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..005478359d06 --- /dev/null +++ b/drivers/leds/leds-lm3532.c @@ -0,0 +1,595 @@ +// 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/input.h> +#include <linux/types.h> +#include <linux/regulator/consumer.h> +#include <linux/module.h> +#include <uapi/linux/uleds.h> +#include <linux/gpio/consumer.h> + +#include <dt-bindings/leds/leds-lm3532.h> + +#define LM3532_NAME "lm3532-led" + +#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_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 + +/* + * 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, +}; + +static int lm3532_led_enable(struct lm3532_led *led_data) +{ + int ctrl_en_val; + int ret; + + switch (led_data->control_bank) { + case LM3532_CONTROL_A: + ctrl_en_val = LM3532_CTRL_A_ENABLE; + break; + case LM3532_CONTROL_B: + ctrl_en_val = LM3532_CTRL_B_ENABLE; + break; + case LM3532_CONTROL_C: + ctrl_en_val = LM3532_CTRL_C_ENABLE; + break; + default: + dev_err(led_data->priv->dev, "Invalid control bank\n"); + return -EINVAL; + }; + + 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; + int ret; + + switch (led_data->control_bank) { + case LM3532_CONTROL_A: + ctrl_en_val = LM3532_CTRL_A_ENABLE; + break; + case LM3532_CONTROL_B: + ctrl_en_val = LM3532_CTRL_B_ENABLE; + break; + case LM3532_CONTROL_C: + ctrl_en_val = LM3532_CTRL_C_ENABLE; + break; + default: + dev_err(led_data->priv->dev, "Invalid control bank\n"); + return -EINVAL; + }; + + 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 brightnes_reg; + int ret; + + mutex_lock(&led->priv->lock); + + if (led->mode == LM3532_BL_MODE_ALS) { + ret = 0; + goto unlock; + } + + switch (led->control_bank) { + case LM3532_CONTROL_A: + brightnes_reg = LM3532_REG_CTRL_A_BRT; + break; + case LM3532_CONTROL_B: + brightnes_reg = LM3532_REG_CTRL_B_BRT; + break; + case LM3532_CONTROL_C: + brightnes_reg = LM3532_REG_CTRL_C_BRT; + break; + default: + dev_err(led->priv->dev, "Invalid control bank\n"); + ret = -EINVAL; + goto unlock; + }; + + if (brt_val == LED_OFF) { + ret = lm3532_led_disable(led); + goto unlock; + } + + lm3532_led_enable(led); + brt_val = brt_val / LM3532_BRT_VAL_ADJUST; + + ret = regmap_write(led->priv->regmap, brightnes_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); + + 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_als_data *als = priv->als_data; + u32 als_vmin, als_vmax, als_vstep; + int zone_reg = LM3532_REG_ZN_0_HI; + 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)); + + return regmap_write(priv->regmap, LM3532_ALS_CONFIG, als->config); +} + +static int lm3532_parse_als(struct lm3532_data *priv) +{ + struct lm3532_als_data *als; + int ret; + + als = devm_kzalloc(priv->dev, sizeof(*als), GFP_KERNEL); + if (als == NULL) + return -ENOMEM; + + ret = device_property_read_u32(&priv->client->dev, "als-vmin", + &als->als_vmin); + if (ret) + als->als_vmin = 0; + + ret = device_property_read_u32(&priv->client->dev, "als-vmax", + &als->als_vmax); + if (ret) + als->als_vmax = LM3532_ALS_WINDOW_mV; + + ret = device_property_read_u8(&priv->client->dev, "als1-imp-sel", + &als->als1_imp_sel); + if (ret) + als->als1_imp_sel = 0; + + ret = device_property_read_u8(&priv->client->dev, "als2-imp-sel", + &als->als2_imp_sel); + if (ret) + als->als2_imp_sel = 0; + + ret = device_property_read_u8(&priv->client->dev, "als-avrg-time", + &als->als_avrg_time); + if (ret) + als->als_avrg_time = 0; + + ret = device_property_read_u8(&priv->client->dev, "als-input-mode", + &als->als_input_mode); + if (ret) + als->als_input_mode = 0; + + 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; + 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-down-ms", + &priv->runtime_ramp_up); + if (ret) + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); + + ret = device_property_read_u32(&priv->client->dev, "ramp-down-ms", + &priv->runtime_ramp_down); + if (ret) + dev_info(&priv->client->dev, "ramp-down-ms property missing\n"); + + 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->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); + + 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@ti.com>"); diff --git a/include/dt-bindings/leds/leds-lm3532.h b/include/dt-bindings/leds/leds-lm3532.h new file mode 100644 index 000000000000..724dbc0cb395 --- /dev/null +++ b/include/dt-bindings/leds/leds-lm3532.h @@ -0,0 +1,72 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* TI LM3532 LED driver + * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/ + */ + +#ifndef __DT_BINDINGS_LEDS_LM3532_H +#define __DT_BINDINGS_LEDS_LM3532_H + +#define LM3532_BL_MODE_MANUAL 0x00 /* "man" */ +#define LM3532_BL_MODE_ALS 0x01 /* "als" */ + +/* ALS Resistor Select */ +#define LM3532_IMP_HIGH 0x00 +#define LM3532_IMP_37K 0x01 +#define LM3532_IMP_18_5K 0x02 +#define LM3532_IMP_12_33K 0x03 +#define LM3532_IMP_9_25K 0x04 +#define LM3532_IMP_7_4K 0x05 +#define LM3532_IMP_6_17K 0x06 +#define LM3532_IMP_5_29K 0x07 +#define LM3532_IMP_4_63K 0x08 +#define LM3532_IMP_4_11K 0x09 +#define LM3532_IMP_3_7K 0x0a +#define LM3532_IMP_3_36K 0x0b +#define LM3532_IMP_3_08K 0x0c +#define LM3532_IMP_2_85K 0x0d +#define LM3532_IMP_2_64K 0x0e +#define LM3532_IMP_2_44K 0x0f +#define LM3532_IMP_2_31K 0x10 +#define LM3532_IMP_2_18K 0x11 +#define LM3532_IMP_2_06K 0x12 +#define LM3532_IMP_1_95K 0x13 +#define LM3532_IMP_1_85K 0x14 +#define LM3532_IMP_1_76K 0x15 +#define LM3532_IMP_1_68K 0x16 +#define LM3532_IMP_1_61K 0x17 +#define LM3532_IMP_1_54K 0x18 +#define LM3532_IMP_1_48K 0x19 +#define LM3532_IMP_1_42K 0x1a +#define LM3532_IMP_1_37K 0x1b +#define LM3532_IMP_1_32K 0x1c +#define LM3532_IMP_1_28K 0x1d +#define LM3532_IMP_1_23K 0x1e +#define LM3532_IMP_1_19K 0x1f + +/* ALS Averaging Time */ +#define LM3532_ALS_AVRG_TIME_17_92ms 0x00 +#define LM3532_ALS_AVRG_TIME_35_84ms 0x01 +#define LM3532_ALS_AVRG_TIME_71_68ms 0x02 +#define LM3532_ALS_AVRG_TIME_143_36ms 0x03 +#define LM3532_ALS_AVRG_TIME_286_72ms 0x04 +#define LM3532_ALS_AVRG_TIME_573_44ms 0x05 +#define LM3532_ALS_AVRG_TIME_1146_88ms 0x06 +#define LM3532_ALS_AVRG_TIME_2293_76ms 0x07 + +/* ALS input select */ +#define LM3532_ALS_INPUT_AVRG 0x00 /* ALS1 and ALS2 input average */ +#define LM3532_ALS_INPUT_ALS1 0x01 /* ALS1 Input */ +#define LM3532_ALS_INPUT_ALS2 0x02 /* ALS2 Input */ +#define LM3532_ALS_INPUT_CEIL 0x03 /* Max of ALS1 and ALS2 */ + +/* Ramp Times */ +#define LM3532_RAMP_8us 0x00 +#define LM3532_RAMP_1024us 0x01 +#define LM3532_RAMP_2048us 0x02 +#define LM3532_RAMP_4096us 0x03 +#define LM3532_RAMP_8192us 0x04 +#define LM3532_RAMP_16384us 0x05 +#define LM3532_RAMP_32768us 0x06 +#define LM3532_RAMP_65536us 0x07 + +#endif /* __DT_BINDINGS_LEDS_LM3532_H */
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@ti.com> --- drivers/leds/Kconfig | 10 + drivers/leds/Makefile | 1 + drivers/leds/leds-lm3532.c | 595 +++++++++++++++++++++++++ include/dt-bindings/leds/leds-lm3532.h | 72 +++ 4 files changed, 678 insertions(+) create mode 100644 drivers/leds/leds-lm3532.c create mode 100644 include/dt-bindings/leds/leds-lm3532.h