// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2011 ST-Ericsson SA. * Copyright (C) 2009 Motorola, Inc. * * Simple driver for National Semiconductor LM3530 Backlight driver chip * * Author: Shreshtha Kumar SAHU <[email protected]> * based on leds-lm3530.c by Dan Murphy <[email protected]> */ #include <linux/i2c.h> #include <linux/leds.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/input.h> #include <linux/led-lm3530.h> #include <linux/types.h> #include <linux/regulator/consumer.h> #include <linux/module.h> #define LM3530_LED_DEV … #define LM3530_NAME … #define LM3530_GEN_CONFIG … #define LM3530_ALS_CONFIG … #define LM3530_BRT_RAMP_RATE … #define LM3530_ALS_IMP_SELECT … #define LM3530_BRT_CTRL_REG … #define LM3530_ALS_ZB0_REG … #define LM3530_ALS_ZB1_REG … #define LM3530_ALS_ZB2_REG … #define LM3530_ALS_ZB3_REG … #define LM3530_ALS_Z0T_REG … #define LM3530_ALS_Z1T_REG … #define LM3530_ALS_Z2T_REG … #define LM3530_ALS_Z3T_REG … #define LM3530_ALS_Z4T_REG … #define LM3530_REG_MAX … /* General Control Register */ #define LM3530_EN_I2C_SHIFT … #define LM3530_RAMP_LAW_SHIFT … #define LM3530_MAX_CURR_SHIFT … #define LM3530_EN_PWM_SHIFT … #define LM3530_PWM_POL_SHIFT … #define LM3530_EN_PWM_SIMPLE_SHIFT … #define LM3530_ENABLE_I2C … #define LM3530_ENABLE_PWM … #define LM3530_POL_LOW … #define LM3530_ENABLE_PWM_SIMPLE … /* ALS Config Register Options */ #define LM3530_ALS_AVG_TIME_SHIFT … #define LM3530_EN_ALS_SHIFT … #define LM3530_ALS_SEL_SHIFT … #define LM3530_ENABLE_ALS … /* Brightness Ramp Rate Register */ #define LM3530_BRT_RAMP_FALL_SHIFT … #define LM3530_BRT_RAMP_RISE_SHIFT … /* ALS Resistor Select */ #define LM3530_ALS1_IMP_SHIFT … #define LM3530_ALS2_IMP_SHIFT … /* Zone Boundary Register defaults */ #define LM3530_ALS_ZB_MAX … #define LM3530_ALS_WINDOW_mV … #define LM3530_ALS_OFFSET_mV … /* Zone Target Register defaults */ #define LM3530_DEF_ZT_0 … #define LM3530_DEF_ZT_1 … #define LM3530_DEF_ZT_2 … #define LM3530_DEF_ZT_3 … #define LM3530_DEF_ZT_4 … /* 7 bits are used for the brightness : LM3530_BRT_CTRL_REG */ #define MAX_BRIGHTNESS … struct lm3530_mode_map { … }; static struct lm3530_mode_map mode_map[] = …; /** * struct lm3530_data * @led_dev: led class device * @client: i2c client * @pdata: LM3530 platform data * @mode: mode of operation - manual, ALS, PWM * @regulator: regulator * @brightness: previous brightness value * @enable: regulator is enabled */ struct lm3530_data { … }; /* * struct lm3530_als_data * @config : value of ALS configuration register * @imp_sel : value of ALS resistor select register * @zone : values of ALS ZB(Zone Boundary) registers */ struct lm3530_als_data { … }; static const u8 lm3530_reg[LM3530_REG_MAX] = …; static int lm3530_get_mode_from_str(const char *str) { … } static void lm3530_als_configure(struct lm3530_platform_data *pdata, struct lm3530_als_data *als) { … } static int lm3530_led_enable(struct lm3530_data *drvdata) { … } static void lm3530_led_disable(struct lm3530_data *drvdata) { … } static int lm3530_init_registers(struct lm3530_data *drvdata) { … } static void lm3530_brightness_set(struct led_classdev *led_cdev, enum led_brightness brt_val) { … } static ssize_t mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { … } static DEVICE_ATTR_RW(mode); static struct attribute *lm3530_attrs[] = …; ATTRIBUTE_GROUPS(…); static int lm3530_probe(struct i2c_client *client) { … } static void lm3530_remove(struct i2c_client *client) { … } static const struct i2c_device_id lm3530_id[] = …; MODULE_DEVICE_TABLE(i2c, lm3530_id); static struct i2c_driver lm3530_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …;
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