1 // SPDX-License-Identifier: GPL-2.0-only
3  * LP5521 LED chip driver.
18 #include <linux/platform_data/leds-lp55xx.h>
22 #include "leds-lp55xx-common.h"
44 /* Base register to set LED current */
61 #define LP5521_CP_MODE_OFF		0	/* Charge pump (CP) off */
114 static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current)  in lp5521_set_led_current()  argument
116 	led->led_current = led_current;  in lp5521_set_led_current()
117 	lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr,  in lp5521_set_led_current()
123 	enum lp55xx_engine_index idx = chip->engine_idx;  in lp5521_load_engine()
149 	enum lp55xx_engine_index idx = chip->engine_idx;  in lp5521_stop_engine()
214 	enum lp55xx_engine_index idx = chip->engine_idx;  in lp5521_update_program_memory()
228 	while ((offset < size - 1) && (i < LP5521_PROGRAM_LENGTH)) {  in lp5521_update_program_memory()
250 			return -EINVAL;  in lp5521_update_program_memory()
256 	dev_err(&chip->cl->dev, "wrong pattern format\n");  in lp5521_update_program_memory()
257 	return -EINVAL;  in lp5521_update_program_memory()
262 	const struct firmware *fw = chip->fw;  in lp5521_firmware_loaded()
264 	if (fw->size > LP5521_PROGRAM_LENGTH) {  in lp5521_firmware_loaded()
265 		dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",  in lp5521_firmware_loaded()
266 			fw->size);  in lp5521_firmware_loaded()
277 	lp5521_update_program_memory(chip, fw->data, fw->size);  in lp5521_firmware_loaded()
287 	 * current reg. This is dummy read is required on some platforms -  in lp5521_post_init_device()
289 	 * LP5521_REG_ENABLE register will not have any effect - strange!  in lp5521_post_init_device()
293 		dev_err(&chip->cl->dev, "error in resetting chip\n");  in lp5521_post_init_device()
297 		dev_err(&chip->cl->dev,  in lp5521_post_init_device()
300 		ret = -EINVAL;  in lp5521_post_init_device()
317 	/* Initialize all channels PWM to zero -> leds off */  in lp5521_post_init_device()
334 	struct lp55xx_platform_data *pdata = chip->pdata;  in lp5521_run_selftest()
342 	if (pdata->clock_mode != LP55XX_CLOCK_EXT)  in lp5521_run_selftest()
347 		return -EIO;  in lp5521_run_selftest()
352 static int lp5521_multicolor_brightness(struct lp55xx_led *led)  in lp5521_multicolor_brightness()  argument
354 	struct lp55xx_chip *chip = led->chip;  in lp5521_multicolor_brightness()
358 	mutex_lock(&chip->lock);  in lp5521_multicolor_brightness()
359 	for (i = 0; i < led->mc_cdev.num_colors; i++) {  in lp5521_multicolor_brightness()
362 				   led->mc_cdev.subled_info[i].channel,  in lp5521_multicolor_brightness()
363 				   led->mc_cdev.subled_info[i].brightness);  in lp5521_multicolor_brightness()
367 	mutex_unlock(&chip->lock);  in lp5521_multicolor_brightness()
371 static int lp5521_led_brightness(struct lp55xx_led *led)  in lp5521_led_brightness()  argument
373 	struct lp55xx_chip *chip = led->chip;  in lp5521_led_brightness()
376 	mutex_lock(&chip->lock);  in lp5521_led_brightness()
377 	ret = lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr,  in lp5521_led_brightness()
378 		led->brightness);  in lp5521_led_brightness()
379 	mutex_unlock(&chip->lock);  in lp5521_led_brightness()
388 	struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));  in show_engine_mode()  local
389 	struct lp55xx_chip *chip = led->chip;  in show_engine_mode()
390 	enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;  in show_engine_mode()
410 	struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));  in store_engine_mode()  local
411 	struct lp55xx_chip *chip = led->chip;  in store_engine_mode()
412 	struct lp55xx_engine *engine = &chip->engines[nr - 1];  in store_engine_mode()
414 	mutex_lock(&chip->lock);  in store_engine_mode()
416 	chip->engine_idx = nr;  in store_engine_mode()
420 		engine->mode = LP55XX_ENGINE_RUN;  in store_engine_mode()
424 		engine->mode = LP55XX_ENGINE_LOAD;  in store_engine_mode()
427 		engine->mode = LP55XX_ENGINE_DISABLED;  in store_engine_mode()
430 	mutex_unlock(&chip->lock);  in store_engine_mode()
442 	struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));  in store_engine_load()  local
443 	struct lp55xx_chip *chip = led->chip;  in store_engine_load()
446 	mutex_lock(&chip->lock);  in store_engine_load()
448 	chip->engine_idx = nr;  in store_engine_load()
452 	mutex_unlock(&chip->lock);  in store_engine_load()
464 	struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));  in lp5521_selftest()  local
465 	struct lp55xx_chip *chip = led->chip;  in lp5521_selftest()
468 	mutex_lock(&chip->lock);  in lp5521_selftest()
470 	mutex_unlock(&chip->lock);  in lp5521_selftest()
524 	struct lp55xx_led *led;  in lp5521_probe()  local
525 	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);  in lp5521_probe()
526 	struct device_node *np = dev_of_node(&client->dev);  in lp5521_probe()
528 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);  in lp5521_probe()
530 		return -ENOMEM;  in lp5521_probe()
532 	chip->cfg = &lp5521_cfg;  in lp5521_probe()
536 			pdata = lp55xx_of_populate_pdata(&client->dev, np,  in lp5521_probe()
541 			dev_err(&client->dev, "no platform data\n");  in lp5521_probe()
542 			return -EINVAL;  in lp5521_probe()
546 	led = devm_kcalloc(&client->dev,  in lp5521_probe()
547 			pdata->num_channels, sizeof(*led), GFP_KERNEL);  in lp5521_probe()
548 	if (!led)  in lp5521_probe()
549 		return -ENOMEM;  in lp5521_probe()
551 	chip->cl = client;  in lp5521_probe()
552 	chip->pdata = pdata;  in lp5521_probe()
554 	mutex_init(&chip->lock);  in lp5521_probe()
556 	i2c_set_clientdata(client, led);  in lp5521_probe()
562 	dev_info(&client->dev, "%s programmable led chip found\n", id->name);  in lp5521_probe()
564 	ret = lp55xx_register_leds(led, chip);  in lp5521_probe()
570 		dev_err(&client->dev, "registering sysfs failed\n");  in lp5521_probe()
584 	struct lp55xx_led *led = i2c_get_clientdata(client);  in lp5521_remove()  local
585 	struct lp55xx_chip *chip = led->chip;  in lp5521_remove()
622 MODULE_DESCRIPTION("LP5521 LED engine");