1 // SPDX-License-Identifier: GPL-2.0-only
3  * LP5562 LED driver
17 #include <linux/platform_data/leds-lp55xx.h>
20 #include "leds-lp55xx-common.h"
114 static void lp5562_set_led_current(struct lp55xx_led *led, u8 led_current)  in lp5562_set_led_current()  argument
123 	led->led_current = led_current;  in lp5562_set_led_current()
124 	lp55xx_write(led->chip, addr[led->chan_nr], led_current);  in lp5562_set_led_current()
129 	enum lp55xx_engine_index idx = chip->engine_idx;  in lp5562_load_engine()
209 	enum lp55xx_engine_index idx = chip->engine_idx;  in lp5562_update_firmware()
210 	u8 pattern[LP5562_PROGRAM_LENGTH] = {0};  in lp5562_update_firmware()  local
229 	while ((offset < size - 1) && (i < LP5562_PROGRAM_LENGTH)) {  in lp5562_update_firmware()
239 		pattern[i] = (u8)cmd;  in lp5562_update_firmware()
250 		lp55xx_write(chip, addr[idx] + i, pattern[i]);  in lp5562_update_firmware()
255 	dev_err(&chip->cl->dev, "wrong pattern format\n");  in lp5562_update_firmware()
256 	return -EINVAL;  in lp5562_update_firmware()
261 	const struct firmware *fw = chip->fw;  in lp5562_firmware_loaded()
267 	if (fw->size > (LP5562_PROGRAM_LENGTH * 2)) {  in lp5562_firmware_loaded()
268 		dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",  in lp5562_firmware_loaded()
269 			fw->size);  in lp5562_firmware_loaded()
280 	lp5562_update_firmware(chip, fw->data, fw->size);  in lp5562_firmware_loaded()
303 	/* Initialize all channels PWM to zero -> leds off */  in lp5562_post_init_device()
309 	/* Set LED map as register PWM by default */  in lp5562_post_init_device()
315 static int lp5562_led_brightness(struct lp55xx_led *led)  in lp5562_led_brightness()  argument
317 	struct lp55xx_chip *chip = led->chip;  in lp5562_led_brightness()
326 	mutex_lock(&chip->lock);  in lp5562_led_brightness()
327 	ret = lp55xx_write(chip, addr[led->chan_nr], led->brightness);  in lp5562_led_brightness()
328 	mutex_unlock(&chip->lock);  in lp5562_led_brightness()
351 	return ptn->size_r >= LP5562_PROGRAM_LENGTH ||  in _is_pc_overflow()
352 	       ptn->size_g >= LP5562_PROGRAM_LENGTH ||  in _is_pc_overflow()
353 	       ptn->size_b >= LP5562_PROGRAM_LENGTH;  in _is_pc_overflow()
366 	ptn = chip->pdata->patterns + (mode - 1);  in lp5562_run_predef_led_pattern()
368 		dev_err(&chip->cl->dev, "invalid pattern data\n");  in lp5562_run_predef_led_pattern()
369 		return -EINVAL;  in lp5562_run_predef_led_pattern()
374 	/* Set LED map as RGB */  in lp5562_run_predef_led_pattern()
379 		chip->engine_idx = i;  in lp5562_run_predef_led_pattern()
393 				ptn->r, ptn->size_r);  in lp5562_run_predef_led_pattern()
395 				ptn->g, ptn->size_g);  in lp5562_run_predef_led_pattern()
397 				ptn->b, ptn->size_b);  in lp5562_run_predef_led_pattern()
409 	struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));  in lp5562_store_pattern()  local
410 	struct lp55xx_chip *chip = led->chip;  in lp5562_store_pattern()
411 	struct lp55xx_predef_pattern *ptn = chip->pdata->patterns;  in lp5562_store_pattern()
412 	int num_patterns = chip->pdata->num_patterns;  in lp5562_store_pattern()
421 		return -EINVAL;  in lp5562_store_pattern()
423 	mutex_lock(&chip->lock);  in lp5562_store_pattern()
425 	mutex_unlock(&chip->lock);  in lp5562_store_pattern()
437 	struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));  in lp5562_store_engine_mux()  local
438 	struct lp55xx_chip *chip = led->chip;  in lp5562_store_engine_mux()
442 	/* LED map  in lp5562_store_engine_mux()
453 		enum lp55xx_engine_index idx = chip->engine_idx;  in lp5562_store_engine_mux()
467 			return -EINVAL;  in lp5562_store_engine_mux()
472 		return -EINVAL;  in lp5562_store_engine_mux()
475 	mutex_lock(&chip->lock);  in lp5562_store_engine_mux()
477 	mutex_unlock(&chip->lock);  in lp5562_store_engine_mux()
519 	struct lp55xx_led *led;  in lp5562_probe()  local
520 	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);  in lp5562_probe()
521 	struct device_node *np = dev_of_node(&client->dev);  in lp5562_probe()
523 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);  in lp5562_probe()
525 		return -ENOMEM;  in lp5562_probe()
527 	chip->cfg = &lp5562_cfg;  in lp5562_probe()
531 			pdata = lp55xx_of_populate_pdata(&client->dev, np,  in lp5562_probe()
536 			dev_err(&client->dev, "no platform data\n");  in lp5562_probe()
537 			return -EINVAL;  in lp5562_probe()
542 	led = devm_kcalloc(&client->dev,  in lp5562_probe()
543 			pdata->num_channels, sizeof(*led), GFP_KERNEL);  in lp5562_probe()
544 	if (!led)  in lp5562_probe()
545 		return -ENOMEM;  in lp5562_probe()
547 	chip->cl = client;  in lp5562_probe()
548 	chip->pdata = pdata;  in lp5562_probe()
550 	mutex_init(&chip->lock);  in lp5562_probe()
552 	i2c_set_clientdata(client, led);  in lp5562_probe()
558 	ret = lp55xx_register_leds(led, chip);  in lp5562_probe()
564 		dev_err(&client->dev, "registering sysfs failed\n");  in lp5562_probe()
578 	struct lp55xx_led *led = i2c_get_clientdata(client);  in lp5562_remove()  local
579 	struct lp55xx_chip *chip = led->chip;  in lp5562_remove()
614 MODULE_DESCRIPTION("Texas Instruments LP5562 LED Driver");