1 // SPDX-License-Identifier: GPL-2.0-only
3  * leds-max8997.c - LED class driver for MAX8997 LEDs.
14 #include <linux/mfd/max8997-private.h>
47 static void max8997_led_set_mode(struct max8997_led *led,  in max8997_led_set_mode()  argument
51 	struct i2c_client *client = led->iodev->i2c;  in max8997_led_set_mode()
57 		val = led->id ?  in max8997_led_set_mode()
59 		led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS;  in max8997_led_set_mode()
63 		val = led->id ?  in max8997_led_set_mode()
65 		led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS;  in max8997_led_set_mode()
70 		val = led->id ?  in max8997_led_set_mode()
72 		led->cdev.max_brightness = MAX8997_LED_FLASH_MAX_BRIGHTNESS;  in max8997_led_set_mode()
77 		val = led->id ?  in max8997_led_set_mode()
79 		led->cdev.max_brightness = MAX8997_LED_MOVIE_MAX_BRIGHTNESS;  in max8997_led_set_mode()
82 		led->cdev.max_brightness = MAX8997_LED_NONE_MAX_BRIGHTNESS;  in max8997_led_set_mode()
90 			dev_err(led->iodev->dev,  in max8997_led_set_mode()
94 	led->led_mode = mode;  in max8997_led_set_mode()
97 static void max8997_led_enable(struct max8997_led *led, bool enable)  in max8997_led_enable()  argument
100 	struct i2c_client *client = led->iodev->i2c;  in max8997_led_enable()
103 	if (led->enabled == enable)  in max8997_led_enable()
110 		dev_err(led->iodev->dev,  in max8997_led_enable()
113 	led->enabled = enable;  in max8997_led_enable()
116 static void max8997_led_set_current(struct max8997_led *led,  in max8997_led_set_current()  argument
120 	struct i2c_client *client = led->iodev->i2c;  in max8997_led_set_current()
123 	switch (led->led_mode) {  in max8997_led_set_current()
128 		reg = led->id ? MAX8997_REG_FLASH2_CUR : MAX8997_REG_FLASH1_CUR;  in max8997_led_set_current()
143 			dev_err(led->iodev->dev,  in max8997_led_set_current()
151 	struct max8997_led *led =  in max8997_led_brightness_set()  local
155 		max8997_led_set_current(led, value);  in max8997_led_brightness_set()
156 		max8997_led_enable(led, true);  in max8997_led_brightness_set()
158 		max8997_led_set_current(led, value);  in max8997_led_brightness_set()
159 		max8997_led_enable(led, false);  in max8997_led_brightness_set()
167 	struct max8997_led *led =  in mode_show()  local
171 	mutex_lock(&led->mutex);  in mode_show()
173 	switch (led->led_mode) {  in mode_show()
191 	mutex_unlock(&led->mutex);  in mode_show()
201 	struct max8997_led *led =  in mode_store()  local
205 	mutex_lock(&led->mutex);  in mode_store()
218 	max8997_led_set_mode(led, mode);  in mode_store()
220 	mutex_unlock(&led->mutex);  in mode_store()
235 	struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);  in max8997_led_probe()
236 	struct max8997_platform_data *pdata = dev_get_platdata(iodev->dev);  in max8997_led_probe()
237 	struct max8997_led *led;  in max8997_led_probe()  local
241 	led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL);  in max8997_led_probe()
242 	if (led == NULL)  in max8997_led_probe()
243 		return -ENOMEM;  in max8997_led_probe()
245 	led->id = pdev->id;  in max8997_led_probe()
246 	snprintf(name, sizeof(name), "max8997-led%d", pdev->id);  in max8997_led_probe()
248 	led->cdev.name = name;  in max8997_led_probe()
249 	led->cdev.brightness_set = max8997_led_brightness_set;  in max8997_led_probe()
250 	led->cdev.flags |= LED_CORE_SUSPENDRESUME;  in max8997_led_probe()
251 	led->cdev.brightness = 0;  in max8997_led_probe()
252 	led->cdev.groups = max8997_groups;  in max8997_led_probe()
253 	led->iodev = iodev;  in max8997_led_probe()
256 	if (pdata && pdata->led_pdata) {  in max8997_led_probe()
259 		mode = pdata->led_pdata->mode[led->id];  in max8997_led_probe()
260 		brightness = pdata->led_pdata->brightness[led->id];  in max8997_led_probe()
262 		max8997_led_set_mode(led, mode);  in max8997_led_probe()
264 		if (brightness > led->cdev.max_brightness)  in max8997_led_probe()
265 			brightness = led->cdev.max_brightness;  in max8997_led_probe()
266 		max8997_led_set_current(led, brightness);  in max8997_led_probe()
267 		led->cdev.brightness = brightness;  in max8997_led_probe()
269 		max8997_led_set_mode(led, MAX8997_NONE);  in max8997_led_probe()
270 		max8997_led_set_current(led, 0);  in max8997_led_probe()
273 	mutex_init(&led->mutex);  in max8997_led_probe()
275 	ret = devm_led_classdev_register(&pdev->dev, &led->cdev);  in max8997_led_probe()
284 		.name  = "max8997-led",
292 MODULE_DESCRIPTION("MAX8997 LED driver");
294 MODULE_ALIAS("platform:max8997-led");