// SPDX-License-Identifier: GPL-2.0-or-later /* * leds-blinkm.c * (c) Jan-Simon Möller ([email protected]) */ #include <linux/module.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/sysfs.h> #include <linux/printk.h> #include <linux/pm_runtime.h> #include <linux/leds.h> #include <linux/delay.h> /* Addresses to scan - BlinkM is on 0x09 by default*/ static const unsigned short normal_i2c[] = …; static int blinkm_transfer_hw(struct i2c_client *client, int cmd); static int blinkm_test_run(struct i2c_client *client); struct blinkm_led { … }; #define cdev_to_blmled(c) … struct blinkm_data { … }; /* Colors */ #define RED … #define GREEN … #define BLUE … /* mapping command names to cmd chars - see datasheet */ #define BLM_GO_RGB … #define BLM_FADE_RGB … #define BLM_FADE_HSB … #define BLM_FADE_RAND_RGB … #define BLM_FADE_RAND_HSB … #define BLM_PLAY_SCRIPT … #define BLM_STOP_SCRIPT … #define BLM_SET_FADE_SPEED … #define BLM_SET_TIME_ADJ … #define BLM_GET_CUR_RGB … #define BLM_WRITE_SCRIPT_LINE … #define BLM_READ_SCRIPT_LINE … #define BLM_SET_SCRIPT_LR … #define BLM_SET_ADDR … #define BLM_GET_ADDR … #define BLM_GET_FW_VER … #define BLM_SET_STARTUP_PARAM … /* BlinkM Commands * as extracted out of the datasheet: * * cmdchar = command (ascii) * cmdbyte = command in hex * nr_args = number of arguments (to send) * nr_ret = number of return values (to read) * dir = direction (0 = read, 1 = write, 2 = both) * */ static const struct { … } blinkm_cmds[17] = …; static ssize_t show_color_common(struct device *dev, char *buf, int color) { … } static int store_color_common(struct device *dev, const char *buf, int color) { … } static ssize_t red_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t red_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(red); static ssize_t green_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t green_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(green); static ssize_t blue_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t blue_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(blue); static ssize_t test_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t test_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(test); /* TODO: HSB, fade, timeadj, script ... */ static struct attribute *blinkm_attrs[] = …; static const struct attribute_group blinkm_group = …; static int blinkm_write(struct i2c_client *client, int cmd, u8 *arg) { … } static int blinkm_read(struct i2c_client *client, int cmd, u8 *arg) { … } static int blinkm_transfer_hw(struct i2c_client *client, int cmd) { … } static int blinkm_led_common_set(struct led_classdev *led_cdev, enum led_brightness value, int color) { … } static int blinkm_led_red_set(struct led_classdev *led_cdev, enum led_brightness value) { … } static int blinkm_led_green_set(struct led_classdev *led_cdev, enum led_brightness value) { … } static int blinkm_led_blue_set(struct led_classdev *led_cdev, enum led_brightness value) { … } static void blinkm_init_hw(struct i2c_client *client) { … } static int blinkm_test_run(struct i2c_client *client) { … } /* Return 0 if detection is successful, -ENODEV otherwise */ static int blinkm_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static int blinkm_probe(struct i2c_client *client) { … } static void blinkm_remove(struct i2c_client *client) { … } static const struct i2c_device_id blinkm_id[] = …; MODULE_DEVICE_TABLE(i2c, blinkm_id); /* This is the driver that will be inserted */ static struct i2c_driver blinkm_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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