1 // SPDX-License-Identifier: GPL-2.0-only
3  * TI LP8501 9 channel LED Driver
18 #include <linux/platform_data/leds-lp55xx.h>
21 #include "leds-lp55xx-common.h"
83 static void lp8501_set_led_current(struct lp55xx_led *led, u8 led_current)  in lp8501_set_led_current()  argument
85 	led->led_current = led_current;  in lp8501_set_led_current()
86 	lp55xx_write(led->chip, LP8501_REG_LED_CURRENT_BASE + led->chan_nr,  in lp8501_set_led_current()
99 	/* Chip startup time is 500 us, 1 - 2 ms gives some margin */  in lp8501_post_init_device()
102 	if (chip->pdata->clock_mode != LP55XX_CLOCK_EXT)  in lp8501_post_init_device()
105 	val |= (chip->pdata->charge_pump_mode << LP8501_CP_MODE_SHIFT) & LP8501_CP_MODE_MASK;  in lp8501_post_init_device()
113 				LP8501_PWR_CONFIG_M, chip->pdata->pwr_sel);  in lp8501_post_init_device()
118 	enum lp55xx_engine_index idx = chip->engine_idx;  in lp8501_load_engine()
209 	u8 pattern[LP8501_PROGRAM_LENGTH] = {0};  in lp8501_update_program_memory()  local
223 	while ((offset < size - 1) && (i < LP8501_PROGRAM_LENGTH)) {  in lp8501_update_program_memory()
233 		pattern[i] = (u8)cmd;  in lp8501_update_program_memory()
244 		lp55xx_write(chip, LP8501_REG_PROG_MEM + i, pattern[i]);  in lp8501_update_program_memory()
249 	dev_err(&chip->cl->dev, "wrong pattern format\n");  in lp8501_update_program_memory()
250 	return -EINVAL;  in lp8501_update_program_memory()
255 	const struct firmware *fw = chip->fw;  in lp8501_firmware_loaded()
257 	if (fw->size > LP8501_PROGRAM_LENGTH) {  in lp8501_firmware_loaded()
258 		dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",  in lp8501_firmware_loaded()
259 			fw->size);  in lp8501_firmware_loaded()
270 	lp8501_update_program_memory(chip, fw->data, fw->size);  in lp8501_firmware_loaded()
273 static int lp8501_led_brightness(struct lp55xx_led *led)  in lp8501_led_brightness()  argument
275 	struct lp55xx_chip *chip = led->chip;  in lp8501_led_brightness()
278 	mutex_lock(&chip->lock);  in lp8501_led_brightness()
279 	ret = lp55xx_write(chip, LP8501_REG_LED_PWM_BASE + led->chan_nr,  in lp8501_led_brightness()
280 		     led->brightness);  in lp8501_led_brightness()
281 	mutex_unlock(&chip->lock);  in lp8501_led_brightness()
309 	struct lp55xx_led *led;  in lp8501_probe()  local
310 	struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);  in lp8501_probe()
311 	struct device_node *np = dev_of_node(&client->dev);  in lp8501_probe()
313 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);  in lp8501_probe()
315 		return -ENOMEM;  in lp8501_probe()
317 	chip->cfg = &lp8501_cfg;  in lp8501_probe()
321 			pdata = lp55xx_of_populate_pdata(&client->dev, np,  in lp8501_probe()
326 			dev_err(&client->dev, "no platform data\n");  in lp8501_probe()
327 			return -EINVAL;  in lp8501_probe()
331 	led = devm_kcalloc(&client->dev,  in lp8501_probe()
332 			pdata->num_channels, sizeof(*led), GFP_KERNEL);  in lp8501_probe()
333 	if (!led)  in lp8501_probe()
334 		return -ENOMEM;  in lp8501_probe()
336 	chip->cl = client;  in lp8501_probe()
337 	chip->pdata = pdata;  in lp8501_probe()
339 	mutex_init(&chip->lock);  in lp8501_probe()
341 	i2c_set_clientdata(client, led);  in lp8501_probe()
347 	dev_info(&client->dev, "%s Programmable led chip found\n", id->name);  in lp8501_probe()
349 	ret = lp55xx_register_leds(led, chip);  in lp8501_probe()
355 		dev_err(&client->dev, "registering sysfs failed\n");  in lp8501_probe()
369 	struct lp55xx_led *led = i2c_get_clientdata(client);  in lp8501_remove()  local
370 	struct lp55xx_chip *chip = led->chip;  in lp8501_remove()
402 MODULE_DESCRIPTION("Texas Instruments LP8501 LED driver");