// SPDX-License-Identifier: GPL-2.0-only /* * sky81452-backlight.c SKY81452 backlight driver * * Copyright 2014 Skyworks Solutions Inc. * Author : Gyungoh Yoo <[email protected]> */ #include <linux/backlight.h> #include <linux/err.h> #include <linux/gpio/consumer.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/slab.h> /* registers */ #define SKY81452_REG0 … #define SKY81452_REG1 … #define SKY81452_REG2 … #define SKY81452_REG4 … #define SKY81452_REG5 … /* bit mask */ #define SKY81452_CS … #define SKY81452_EN … #define SKY81452_IGPW … #define SKY81452_PWMMD … #define SKY81452_PHASE … #define SKY81452_ILIM … #define SKY81452_VSHRT … #define SKY81452_OCP … #define SKY81452_OTMP … #define SKY81452_SHRT … #define SKY81452_OPN … #define SKY81452_DEFAULT_NAME … #define SKY81452_MAX_BRIGHTNESS … /** * struct sky81452_bl_platform_data - backlight platform data * @name: backlight driver name. * If it is not defined, default name is lcd-backlight. * @gpiod_enable:GPIO descriptor which control EN pin * @enable: Enable mask for current sink channel 1, 2, 3, 4, 5 and 6. * @ignore_pwm: true if DPWMI should be ignored. * @dpwm_mode: true is DPWM dimming mode, otherwise Analog dimming mode. * @phase_shift:true is phase shift mode. * @short_detection_threshold: It should be one of 4, 5, 6 and 7V. * @boost_current_limit: It should be one of 2300, 2750mA. */ struct sky81452_bl_platform_data { … }; #define CTZ(b) … static int sky81452_bl_update_status(struct backlight_device *bd) { … } static const struct backlight_ops sky81452_bl_ops = …; static ssize_t sky81452_bl_store_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t sky81452_bl_show_open_short(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t sky81452_bl_show_fault(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR(enable, S_IWGRP | S_IWUSR, NULL, sky81452_bl_store_enable); static DEVICE_ATTR(open, S_IRUGO, sky81452_bl_show_open_short, NULL); static DEVICE_ATTR(short, S_IRUGO, sky81452_bl_show_open_short, NULL); static DEVICE_ATTR(fault, S_IRUGO, sky81452_bl_show_fault, NULL); static struct attribute *sky81452_bl_attribute[] = …; static const struct attribute_group sky81452_bl_attr_group = …; #ifdef CONFIG_OF static struct sky81452_bl_platform_data *sky81452_bl_parse_dt( struct device *dev) { … } #else static struct sky81452_bl_platform_data *sky81452_bl_parse_dt( struct device *dev) { return ERR_PTR(-EINVAL); } #endif static int sky81452_bl_init_device(struct regmap *regmap, struct sky81452_bl_platform_data *pdata) { … } static int sky81452_bl_probe(struct platform_device *pdev) { … } static void sky81452_bl_remove(struct platform_device *pdev) { … } #ifdef CONFIG_OF static const struct of_device_id sky81452_bl_of_match[] = …; MODULE_DEVICE_TABLE(of, sky81452_bl_of_match); #endif static struct platform_driver sky81452_bl_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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