// SPDX-License-Identifier: GPL-2.0 // TI LM3532 LED driver // Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com/ // https://www.ti.com/lit/ds/symlink/lm3532.pdf #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 … #define LM3532_BL_MODE_MANUAL … #define LM3532_BL_MODE_ALS … #define LM3532_REG_OUTPUT_CFG … #define LM3532_REG_STARTSHUT_RAMP … #define LM3532_REG_RT_RAMP … #define LM3532_REG_PWM_A_CFG … #define LM3532_REG_PWM_B_CFG … #define LM3532_REG_PWM_C_CFG … #define LM3532_REG_ZONE_CFG_A … #define LM3532_REG_CTRL_A_FS_CURR … #define LM3532_REG_ZONE_CFG_B … #define LM3532_REG_CTRL_B_FS_CURR … #define LM3532_REG_ZONE_CFG_C … #define LM3532_REG_CTRL_C_FS_CURR … #define LM3532_REG_ENABLE … #define LM3532_ALS_CONFIG … #define LM3532_REG_ZN_0_HI … #define LM3532_REG_ZN_0_LO … #define LM3532_REG_ZN_1_HI … #define LM3532_REG_ZN_1_LO … #define LM3532_REG_ZN_2_HI … #define LM3532_REG_ZN_2_LO … #define LM3532_REG_ZN_3_HI … #define LM3532_REG_ZN_3_LO … #define LM3532_REG_ZONE_TRGT_A … #define LM3532_REG_ZONE_TRGT_B … #define LM3532_REG_ZONE_TRGT_C … #define LM3532_REG_MAX … /* Control Enable */ #define LM3532_CTRL_A_ENABLE … #define LM3532_CTRL_B_ENABLE … #define LM3532_CTRL_C_ENABLE … /* PWM Zone Control */ #define LM3532_PWM_ZONE_MASK … #define LM3532_PWM_ZONE_0_EN … #define LM3532_PWM_ZONE_1_EN … #define LM3532_PWM_ZONE_2_EN … #define LM3532_PWM_ZONE_3_EN … #define LM3532_PWM_ZONE_4_EN … /* Brightness Configuration */ #define LM3532_I2C_CTRL … #define LM3532_ALS_CTRL … #define LM3532_LINEAR_MAP … #define LM3532_ZONE_MASK … #define LM3532_ZONE_0 … #define LM3532_ZONE_1 … #define LM3532_ZONE_2 … #define LM3532_ZONE_3 … #define LM3532_ZONE_4 … #define LM3532_ENABLE_ALS … #define LM3532_ALS_SEL_SHIFT … /* Zone Boundary Register */ #define LM3532_ALS_WINDOW_mV … #define LM3532_ALS_ZB_MAX … #define LM3532_ALS_OFFSET_mV … #define LM3532_CONTROL_A … #define LM3532_CONTROL_B … #define LM3532_CONTROL_C … #define LM3532_MAX_CONTROL_BANKS … #define LM3532_MAX_LED_STRINGS … #define LM3532_OUTPUT_CFG_MASK … #define LM3532_BRT_VAL_ADJUST … #define LM3532_RAMP_DOWN_SHIFT … #define LM3532_NUM_RAMP_VALS … #define LM3532_NUM_AVG_VALS … #define LM3532_NUM_IMP_VALS … #define LM3532_FS_CURR_MIN … #define LM3532_FS_CURR_MAX … #define LM3532_FS_CURR_STEP … /* * 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 { … }; /** * 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 * @ctrl_brt_pointer: Zone target register that controls the sink * @num_leds: Number of LED strings are supported in this array * @full_scale_current: The full-scale current setting for the current sink. * @led_strings: The LED strings supported in this array * @enabled: Enabled status */ struct lm3532_led { … }; /** * 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 { … }; static const struct reg_default lm3532_reg_defs[] = …; static const struct regmap_config lm3532_regmap_config = …; static const int als_imp_table[LM3532_NUM_IMP_VALS] = …; static int lm3532_get_als_imp_index(int als_imped) { … } static int lm3532_get_index(const int table[], int size, int value) { … } static const int als_avrg_table[LM3532_NUM_AVG_VALS] = …; static int lm3532_get_als_avg_index(int avg_time) { … } static const int ramp_table[LM3532_NUM_RAMP_VALS] = …; static int lm3532_get_ramp_index(int ramp_time) { … } /* Caller must take care of locking */ static int lm3532_led_enable(struct lm3532_led *led_data) { … } /* Caller must take care of locking */ static int lm3532_led_disable(struct lm3532_led *led_data) { … } static int lm3532_brightness_set(struct led_classdev *led_cdev, enum led_brightness brt_val) { … } static int lm3532_init_registers(struct lm3532_led *led) { … } static int lm3532_als_configure(struct lm3532_data *priv, struct lm3532_led *led) { … } static int lm3532_parse_als(struct lm3532_data *priv) { … } static void gpio_set_low_action(void *data) { … } static int lm3532_parse_node(struct lm3532_data *priv) { … } static int lm3532_probe(struct i2c_client *client) { … } static const struct of_device_id of_lm3532_leds_match[] = …; MODULE_DEVICE_TABLE(of, of_lm3532_leds_match); static const struct i2c_device_id lm3532_id[] = …; MODULE_DEVICE_TABLE(i2c, lm3532_id); static struct i2c_driver lm3532_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …;
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