1 // SPDX-License-Identifier: GPL-2.0
23 #define AW200XX_DIM_MAX                  (BIT(6) - 1)
24 #define AW200XX_FADE_MAX                 (BIT(8) - 1)
41 	AW200XX_REG(AW200XX_NUM_PAGES - 1, AW200XX_PAGE_SIZE - 1)
75 #define AW200XX_LED2REG(x, columns) \  argument
76 	((x) + (((x) / (columns)) * (AW200XX_DSIZE_COLUMNS_MAX - (columns))))
79 #define AW200XX_REG_DIM_PAGE1(x, columns) \  argument
80 	AW200XX_REG(AW200XX_PAGE1, AW200XX_LED2REG(x, columns))
87 #define AW200XX_REG_DIM(x, columns) \  argument
88 	AW200XX_REG(AW200XX_PAGE4, AW200XX_LED2REG(x, columns) * 2)
112 	u32 num;  member
131 	int dim = led->dim;  in dim_show()
144 	struct aw200xx *chip = led->chip;  in dim_store()
145 	u32 columns = chip->cdef->display_size_columns;  in dim_store()  local
150 		dim = -1;  in dim_store()
157 			return -EINVAL;  in dim_store()
160 	mutex_lock(&chip->mutex);  in dim_store()
163 		ret = regmap_write(chip->regmap,  in dim_store()
164 				   AW200XX_REG_DIM_PAGE1(led->num, columns),  in dim_store()
170 	led->dim = dim;  in dim_store()
174 	mutex_unlock(&chip->mutex);  in dim_store()
189 	struct aw200xx *chip = led->chip;  in aw200xx_brightness_set()
194 	mutex_lock(&chip->mutex);  in aw200xx_brightness_set()
196 	reg = AW200XX_REG_DIM(led->num, chip->cdef->display_size_columns);  in aw200xx_brightness_set()
198 	dim = led->dim;  in aw200xx_brightness_set()
202 	ret = regmap_write(chip->regmap, reg, dim);  in aw200xx_brightness_set()
206 	ret = regmap_write(chip->regmap,  in aw200xx_brightness_set()
210 	mutex_unlock(&chip->mutex);  in aw200xx_brightness_set()
231 	led_imax_uA = global_imax_uA * AW200XX_DUTY_RATIO(chip->display_rows);  in aw200xx_imax_from_global()
240 	u32 duty = AW200XX_DUTY_RATIO(chip->display_rows);  in aw200xx_imax_to_global()
252  * The AW200XX has a 4-bit register (GCCR) to configure the global current,
256  * +-----------+-----------------+-----------+-----------------+
258  * +-----------+-----------------+-----------+-----------------+
267  * +-----------+-----------------+-----------+-----------------+
309 		return -EINVAL;  in aw200xx_set_imax()
311 	return regmap_update_bits(chip->regmap, AW200XX_REG_GCCR,  in aw200xx_set_imax()
320 	ret = regmap_write(chip->regmap, AW200XX_REG_RSTR, AW200XX_RSTR_RESET);  in aw200xx_chip_reset()
327 	regcache_mark_dirty(chip->regmap);  in aw200xx_chip_reset()
328 	return regmap_write(chip->regmap, AW200XX_REG_FCD, AW200XX_FCD_CLEAR);  in aw200xx_chip_reset()
335 	ret = regmap_write(chip->regmap, AW200XX_REG_DSIZE,  in aw200xx_chip_init()
336 			   chip->display_rows - 1);  in aw200xx_chip_init()
340 	ret = regmap_write(chip->regmap, AW200XX_REG_SLPCR,  in aw200xx_chip_init()
345 	return regmap_update_bits(chip->regmap, AW200XX_REG_GCCR,  in aw200xx_chip_init()
351 	struct device *dev = &chip->client->dev;  in aw200xx_chip_check()
355 	ret = regmap_read(chip->regmap, AW200XX_REG_IDR, &chipid);  in aw200xx_chip_check()
360 		return dev_err_probe(dev, -ENODEV,  in aw200xx_chip_check()
368 	gpiod_set_value_cansleep(chip->hwen, 1);  in aw200xx_enable()
382 	return gpiod_set_value_cansleep(chip->hwen, 0);  in aw200xx_disable()
396 		if (ret || source >= chip->cdef->channels)  in aw200xx_probe_get_display_rows()
403 		return -EINVAL;  in aw200xx_probe_get_display_rows()
405 	chip->display_rows = max_source / chip->cdef->display_size_columns + 1;  in aw200xx_probe_get_display_rows()
434 			chip->num_leds--;  in aw200xx_probe_fw()
438 		if (source >= chip->cdef->channels) {  in aw200xx_probe_fw()
440 				source, chip->cdef->channels);  in aw200xx_probe_fw()
441 			chip->num_leds--;  in aw200xx_probe_fw()
445 		ret = fwnode_property_read_u32(child, "led-max-microamp",  in aw200xx_probe_fw()
448 			dev_info(&chip->client->dev,  in aw200xx_probe_fw()
449 				 "DT property led-max-microamp is missing\n");  in aw200xx_probe_fw()
451 			dev_err(dev, "Invalid value %u for led-max-microamp\n",  in aw200xx_probe_fw()
453 			chip->num_leds--;  in aw200xx_probe_fw()
459 		led = &chip->leds[i];  in aw200xx_probe_fw()
460 		led->dim = -1;  in aw200xx_probe_fw()
461 		led->num = source;  in aw200xx_probe_fw()
462 		led->chip = chip;  in aw200xx_probe_fw()
463 		led->cdev.brightness_set_blocking = aw200xx_brightness_set;  in aw200xx_probe_fw()
464 		led->cdev.max_brightness = AW200XX_FADE_MAX;  in aw200xx_probe_fw()
465 		led->cdev.groups = dim_groups;  in aw200xx_probe_fw()
468 		ret = devm_led_classdev_register_ext(dev, &led->cdev,  in aw200xx_probe_fw()
476 	if (!chip->num_leds)  in aw200xx_probe_fw()
477 		return -EINVAL;  in aw200xx_probe_fw()
547 	cdef = device_get_match_data(&client->dev);  in aw200xx_probe()
549 		return -ENODEV;  in aw200xx_probe()
551 	count = device_get_child_node_count(&client->dev);  in aw200xx_probe()
552 	if (!count || count > cdef->channels)  in aw200xx_probe()
553 		return dev_err_probe(&client->dev, -EINVAL,  in aw200xx_probe()
556 	chip = devm_kzalloc(&client->dev, struct_size(chip, leds, count),  in aw200xx_probe()
559 		return -ENOMEM;  in aw200xx_probe()
561 	chip->cdef = cdef;  in aw200xx_probe()
562 	chip->num_leds = count;  in aw200xx_probe()
563 	chip->client = client;  in aw200xx_probe()
566 	chip->regmap = devm_regmap_init_i2c(client, &aw200xx_regmap_config);  in aw200xx_probe()
567 	if (IS_ERR(chip->regmap))  in aw200xx_probe()
568 		return PTR_ERR(chip->regmap);  in aw200xx_probe()
570 	chip->hwen = devm_gpiod_get_optional(&client->dev, "enable",  in aw200xx_probe()
572 	if (IS_ERR(chip->hwen))  in aw200xx_probe()
573 		return dev_err_probe(&client->dev, PTR_ERR(chip->hwen),  in aw200xx_probe()
578 	ret = devm_add_action(&client->dev, aw200xx_disable_action, chip);  in aw200xx_probe()
586 	ret = devm_mutex_init(&client->dev, &chip->mutex);  in aw200xx_probe()
591 	mutex_lock(&chip->mutex);  in aw200xx_probe()
597 	ret = devm_add_action(&client->dev, aw200xx_chip_reset_action, chip);  in aw200xx_probe()
601 	ret = aw200xx_probe_fw(&client->dev, chip);  in aw200xx_probe()
611 	mutex_unlock(&chip->mutex);  in aw200xx_probe()