drivers/leds/leds-lp5523.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * lp5523.c - LP5523, LP55231 LED Driver
20 #include <linux/platform_data/leds-lp55xx.h>
23 #include "leds-lp55xx-common.h"
88 	/* Chip startup time is 500 us, 1 - 2 ms gives some margin */  in lp5523_post_init_device()
92 	val |= (chip->pdata->charge_pump_mode << LP5523_CP_MODE_SHIFT) & LP5523_CP_MODE_MASK;  in lp5523_post_init_device()
150 		chip->engine_idx = i;  in lp5523_init_program_engine()
155 					pattern[i - 1][j]);  in lp5523_init_program_engine()
163 	/* Let the programs run for couple of ms and check the engine status */  in lp5523_init_program_engine()
171 		dev_err(&chip->cl->dev,  in lp5523_init_program_engine()
174 		ret = -1;  in lp5523_init_program_engine()
187 	struct lp55xx_chip *chip = led->chip;  in lp5523_selftest()
188 	struct lp55xx_platform_data *pdata = chip->pdata;  in lp5523_selftest()
192 	guard(mutex)(&chip->lock);  in lp5523_selftest()
199 	if (pdata->clock_mode == LP55XX_CLOCK_EXT) {  in lp5523_selftest()
206 	usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */  in lp5523_selftest()
218 	vdd--;	/* There may be some fluctuation in measurement */  in lp5523_selftest()
220 	for (i = 0; i < pdata->num_channels; i++) {  in lp5523_selftest()
222 		if (pdata->led_config[i].led_current == 0)  in lp5523_selftest()
226 		lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,  in lp5523_selftest()
227 			pdata->led_config[i].led_current);  in lp5523_selftest()
229 		lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,  in lp5523_selftest()
231 		/* let current stabilize 2 - 4ms before measurements start */  in lp5523_selftest()
234 			     LP5523_EN_LEDTEST | led->chan_nr);  in lp5523_selftest()
235 		/* ADC conversion time is 2.7 ms typically */  in lp5523_selftest()
250 					     led->chan_nr);  in lp5523_selftest()
252 		lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,  in lp5523_selftest()
256 		lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,  in lp5523_selftest()
257 			     led->led_current);  in lp5523_selftest()