// SPDX-License-Identifier: GPL-2.0-or-later /* * leds-lm3533.c -- LM3533 LED driver * * Copyright (C) 2011-2012 Texas Instruments * * Author: Johan Hovold <[email protected]> */ #include <linux/module.h> #include <linux/leds.h> #include <linux/mfd/core.h> #include <linux/mutex.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/mfd/lm3533.h> #define LM3533_LVCTRLBANK_MIN … #define LM3533_LVCTRLBANK_MAX … #define LM3533_LVCTRLBANK_COUNT … #define LM3533_RISEFALLTIME_MAX … #define LM3533_ALS_CHANNEL_LV_MIN … #define LM3533_ALS_CHANNEL_LV_MAX … #define LM3533_REG_CTRLBANK_BCONF_BASE … #define LM3533_REG_PATTERN_ENABLE … #define LM3533_REG_PATTERN_LOW_TIME_BASE … #define LM3533_REG_PATTERN_HIGH_TIME_BASE … #define LM3533_REG_PATTERN_RISETIME_BASE … #define LM3533_REG_PATTERN_FALLTIME_BASE … #define LM3533_REG_PATTERN_STEP … #define LM3533_REG_CTRLBANK_BCONF_MAPPING_MASK … #define LM3533_REG_CTRLBANK_BCONF_ALS_EN_MASK … #define LM3533_REG_CTRLBANK_BCONF_ALS_CHANNEL_MASK … #define LM3533_LED_FLAG_PATTERN_ENABLE … struct lm3533_led { … }; static inline struct lm3533_led *to_lm3533_led(struct led_classdev *cdev) { … } static inline int lm3533_led_get_ctrlbank_id(struct lm3533_led *led) { … } static inline u8 lm3533_led_get_lv_reg(struct lm3533_led *led, u8 base) { … } static inline u8 lm3533_led_get_pattern(struct lm3533_led *led) { … } static inline u8 lm3533_led_get_pattern_reg(struct lm3533_led *led, u8 base) { … } static int lm3533_led_pattern_enable(struct lm3533_led *led, int enable) { … } static int lm3533_led_set(struct led_classdev *cdev, enum led_brightness value) { … } static enum led_brightness lm3533_led_get(struct led_classdev *cdev) { … } /* Pattern generator defines (delays in us). */ #define LM3533_LED_DELAY1_VMIN … #define LM3533_LED_DELAY2_VMIN … #define LM3533_LED_DELAY3_VMIN … #define LM3533_LED_DELAY1_VMAX … #define LM3533_LED_DELAY2_VMAX … #define LM3533_LED_DELAY3_VMAX … #define LM3533_LED_DELAY1_TMIN … #define LM3533_LED_DELAY2_TMIN … #define LM3533_LED_DELAY3_TMIN … #define LM3533_LED_DELAY1_TMAX … #define LM3533_LED_DELAY2_TMAX … #define LM3533_LED_DELAY3_TMAX … /* t_step = (t_max - t_min) / (v_max - v_min) */ #define LM3533_LED_DELAY1_TSTEP … #define LM3533_LED_DELAY2_TSTEP … #define LM3533_LED_DELAY3_TSTEP … /* Delay limits for hardware accelerated blinking (in ms). */ #define LM3533_LED_DELAY_ON_MAX … #define LM3533_LED_DELAY_OFF_MAX … /* * Returns linear map of *t from [t_min,t_max] to [v_min,v_max] with a step * size of t_step, where * * t_step = (t_max - t_min) / (v_max - v_min) * * and updates *t to reflect the mapped value. */ static u8 time_to_val(unsigned *t, unsigned t_min, unsigned t_step, u8 v_min, u8 v_max) { … } /* * Returns time code corresponding to *delay (in ms) and updates *delay to * reflect actual hardware delay. * * Hardware supports 256 discrete delay times, divided into three groups with * the following ranges and step-sizes: * * [ 16, 999] [0x00, 0x3e] step 16 ms * [ 1130, 9781] [0x3d, 0x7f] step 131 ms * [10306, 76890] [0x80, 0xff] step 524 ms * * Note that delay group 3 is only available for delay_off. */ static u8 lm3533_led_get_hw_delay(unsigned *delay) { … } /* * Set delay register base to *delay (in ms) and update *delay to reflect * actual hardware delay used. */ static u8 lm3533_led_delay_set(struct lm3533_led *led, u8 base, unsigned long *delay) { … } static int lm3533_led_delay_on_set(struct lm3533_led *led, unsigned long *t) { … } static int lm3533_led_delay_off_set(struct lm3533_led *led, unsigned long *t) { … } static int lm3533_led_blink_set(struct led_classdev *cdev, unsigned long *delay_on, unsigned long *delay_off) { … } static ssize_t show_id(struct device *dev, struct device_attribute *attr, char *buf) { … } /* * Pattern generator rise/fall times: * * 0 - 2048 us (default) * 1 - 262 ms * 2 - 524 ms * 3 - 1.049 s * 4 - 2.097 s * 5 - 4.194 s * 6 - 8.389 s * 7 - 16.78 s */ static ssize_t show_risefalltime(struct device *dev, struct device_attribute *attr, char *buf, u8 base) { … } static ssize_t show_risetime(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t show_falltime(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_risefalltime(struct device *dev, struct device_attribute *attr, const char *buf, size_t len, u8 base) { … } static ssize_t store_risetime(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t store_falltime(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t show_als_channel(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_als_channel(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t show_als_en(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_als_en(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t show_linear(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_linear(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static LM3533_ATTR_RW(als_channel); static LM3533_ATTR_RW(als_en); static LM3533_ATTR_RW(falltime); static LM3533_ATTR_RO(id); static LM3533_ATTR_RW(linear); static LM3533_ATTR_RW(pwm); static LM3533_ATTR_RW(risetime); static struct attribute *lm3533_led_attributes[] = …; static umode_t lm3533_led_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { struct device *dev = kobj_to_dev(kobj); struct led_classdev *led_cdev = dev_get_drvdata(dev); struct lm3533_led *led = to_lm3533_led(led_cdev); umode_t mode = attr->mode; if (attr == &dev_attr_als_channel.attr || attr == &dev_attr_als_en.attr) { if (!led->lm3533->have_als) mode = 0; } return mode; }; static const struct attribute_group lm3533_led_attribute_group = …; static const struct attribute_group *lm3533_led_attribute_groups[] = …; static int lm3533_led_setup(struct lm3533_led *led, struct lm3533_led_platform_data *pdata) { … } static int lm3533_led_probe(struct platform_device *pdev) { … } static void lm3533_led_remove(struct platform_device *pdev) { … } static void lm3533_led_shutdown(struct platform_device *pdev) { … } static struct platform_driver lm3533_led_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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