1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * IIO driver for Lite-On LTR390 ALS and UV sensor
4  * (7-bit I2C slave address 0x53)
12 …*   https://optoelectronics.liteon.com/upload/download/DS86-2015-0004/LTR-390UV_Final_%20DS_V1%201…
15  *   - Support for configurable gain and resolution
16  *   - Sensor suspend/resume support
17  *   - Add support for reading the ALS
18  *   - Interrupt support
65  * At 20-bit resolution (integration time: 400ms) and 18x gain, 2300 counts of
68  * For the default resolution of 18-bit (integration time: 100ms) and default
122 	struct device *dev = &data->client->dev;  in ltr390_register_read()
126 	ret = regmap_bulk_read(data->regmap, register_address, recieve_buffer,  in ltr390_register_read()
140 	if (data->mode == mode)  in ltr390_set_mode()
145 		ret = regmap_clear_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_UVS_MODE);  in ltr390_set_mode()
149 		ret = regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_UVS_MODE);  in ltr390_set_mode()
156 	data->mode = mode;  in ltr390_set_mode()
165 	return DIV_ROUND_CLOSEST(23 * data->gain * data->int_time_us, 10 * orig_gain * orig_int_time);  in ltr390_counts_per_uvi()
173 	ret = regmap_read(data->regmap, LTR390_ALS_UVS_MEAS_RATE, &value);  in ltr390_get_samp_freq_or_period()
188 	guard(mutex)(&data->lock);  in ltr390_read_raw()
191 		switch (chan->type) {  in ltr390_read_raw()
213 			return -EINVAL;  in ltr390_read_raw()
218 		switch (chan->type) {  in ltr390_read_raw()
226 			*val2 = data->gain * data->int_time_us;  in ltr390_read_raw()
230 			return -EINVAL;  in ltr390_read_raw()
234 		*val = data->int_time_us;  in ltr390_read_raw()
242 		return -EINVAL;  in ltr390_read_raw()
303 		guard(mutex)(&data->lock);  in ltr390_set_gain()
304 		ret = regmap_update_bits(data->regmap,  in ltr390_set_gain()
310 		data->gain = ltr390_gain_map[idx];  in ltr390_set_gain()
314 	return -EINVAL;  in ltr390_set_gain()
325 		guard(mutex)(&data->lock);  in ltr390_set_int_time()
326 		ret = regmap_update_bits(data->regmap,  in ltr390_set_int_time()
333 		data->int_time_us = ltr390_int_time_map_us[idx];  in ltr390_set_int_time()
337 	return -EINVAL;  in ltr390_set_int_time()
348 		guard(mutex)(&data->lock);  in ltr390_set_samp_freq()
349 		return regmap_update_bits(data->regmap,  in ltr390_set_samp_freq()
354 	return -EINVAL;  in ltr390_set_samp_freq()
377 		return -EINVAL;  in ltr390_read_avail()
389 			return -EINVAL;  in ltr390_write_raw()
395 			return -EINVAL;  in ltr390_write_raw()
401 			return -EINVAL;  in ltr390_write_raw()
406 		return -EINVAL;  in ltr390_write_raw()
415 	ret = regmap_read(data->regmap, LTR390_INT_PST, &prst);  in ltr390_read_intr_prst()
431 		return -EINVAL;  in ltr390_write_intr_prst()
435 		return -EINVAL;  in ltr390_write_intr_prst()
437 	guard(mutex)(&data->lock);  in ltr390_write_intr_prst()
438 	ret = regmap_update_bits(data->regmap,  in ltr390_write_intr_prst()
470 		return -EINVAL;  in ltr390_read_threshold()
480 	guard(mutex)(&data->lock);  in ltr390_write_threshold()
483 		return regmap_bulk_write(data->regmap, LTR390_THRESH_UP, &val, 3);  in ltr390_write_threshold()
486 		return regmap_bulk_write(data->regmap, LTR390_THRESH_LOW, &val, 3);  in ltr390_write_threshold()
489 		return -EINVAL;  in ltr390_write_threshold()
508 		return -EINVAL;  in ltr390_read_event_value()
522 			return -EINVAL;  in ltr390_write_event_value()
528 			return -EINVAL;  in ltr390_write_event_value()
533 		return -EINVAL;  in ltr390_write_event_value()
545 	ret = regmap_read(data->regmap, LTR390_INT_CFG, &status);  in ltr390_read_event_config()
562 		return regmap_clear_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_EN);  in ltr390_write_event_config()
564 	guard(mutex)(&data->lock);  in ltr390_write_event_config()
565 	ret = regmap_set_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_EN);  in ltr390_write_event_config()
569 	switch (chan->type) {  in ltr390_write_event_config()
575 		return regmap_clear_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_SEL_UVS);  in ltr390_write_event_config()
582 		return regmap_set_bits(data->regmap, LTR390_INT_CFG, LTR390_LS_INT_SEL_UVS);  in ltr390_write_event_config()
585 		return -EINVAL;  in ltr390_write_event_config()
606 	ret = regmap_read(data->regmap, LTR390_MAIN_STATUS, &status);  in ltr390_interrupt_handler()
610 	switch (data->mode) {  in ltr390_interrupt_handler()
638 	dev = &client->dev;  in ltr390_probe()
641 		return -ENOMEM;  in ltr390_probe()
645 	data->regmap = devm_regmap_init_i2c(client, &ltr390_regmap_config);  in ltr390_probe()
646 	if (IS_ERR(data->regmap))  in ltr390_probe()
647 		return dev_err_probe(dev, PTR_ERR(data->regmap),  in ltr390_probe()
650 	data->client = client;  in ltr390_probe()
652 	data->int_time_us = 100000;  in ltr390_probe()
654 	data->gain = 3;  in ltr390_probe()
656 	data->mode = LTR390_SET_ALS_MODE;  in ltr390_probe()
658 	mutex_init(&data->lock);  in ltr390_probe()
660 	indio_dev->info = &ltr390_info;  in ltr390_probe()
661 	indio_dev->channels = ltr390_channels;  in ltr390_probe()
662 	indio_dev->num_channels = ARRAY_SIZE(ltr390_channels);  in ltr390_probe()
663 	indio_dev->name = "ltr390";  in ltr390_probe()
665 	ret = regmap_read(data->regmap, LTR390_PART_ID, &part_number);  in ltr390_probe()
675 	regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SW_RESET);  in ltr390_probe()
680 	ret = regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SENSOR_ENABLE);  in ltr390_probe()
684 	if (client->irq) {  in ltr390_probe()
685 		ret = devm_request_threaded_irq(dev, client->irq,  in ltr390_probe()
692 					     "request irq (%d) failed\n", client->irq);  in ltr390_probe()
703 	return regmap_clear_bits(data->regmap, LTR390_MAIN_CTRL,  in ltr390_suspend()
712 	return regmap_set_bits(data->regmap, LTR390_MAIN_CTRL,  in ltr390_resume()
742 MODULE_DESCRIPTION("Lite-On LTR390 ALS and UV sensor Driver");