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
52  * At 20-bit resolution (integration time: 400ms) and 18x gain, 2300 counts of
55  * For the default resolution of 18-bit (integration time: 100ms) and default
92 	struct device *dev = &data->client->dev;  in ltr390_register_read()
96 	ret = regmap_bulk_read(data->regmap, register_address, recieve_buffer,  in ltr390_register_read()
110 	if (data->mode == mode)  in ltr390_set_mode()
115 		ret = regmap_clear_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_UVS_MODE);  in ltr390_set_mode()
119 		ret = regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_UVS_MODE);  in ltr390_set_mode()
126 	data->mode = mode;  in ltr390_set_mode()
135 	return DIV_ROUND_CLOSEST(23 * data->gain * data->int_time_us, 10 * orig_gain * orig_int_time);  in ltr390_counts_per_uvi()
145 	guard(mutex)(&data->lock);  in ltr390_read_raw()
148 		switch (chan->type) {  in ltr390_read_raw()
170 			return -EINVAL;  in ltr390_read_raw()
175 		switch (chan->type) {  in ltr390_read_raw()
183 			*val2 = data->gain * data->int_time_us;  in ltr390_read_raw()
187 			return -EINVAL;  in ltr390_read_raw()
191 		*val = data->int_time_us;  in ltr390_read_raw()
195 		return -EINVAL;  in ltr390_read_raw()
230 		guard(mutex)(&data->lock);  in ltr390_set_gain()
231 		ret = regmap_update_bits(data->regmap,  in ltr390_set_gain()
237 		data->gain = ltr390_gain_map[idx];  in ltr390_set_gain()
241 	return -EINVAL;  in ltr390_set_gain()
252 		guard(mutex)(&data->lock);  in ltr390_set_int_time()
253 		ret = regmap_update_bits(data->regmap,  in ltr390_set_int_time()
260 		data->int_time_us = ltr390_int_time_map_us[idx];  in ltr390_set_int_time()
264 	return -EINVAL;  in ltr390_set_int_time()
282 		return -EINVAL;  in ltr390_read_avail()
294 			return -EINVAL;  in ltr390_write_raw()
300 			return -EINVAL;  in ltr390_write_raw()
305 		return -EINVAL;  in ltr390_write_raw()
322 	dev = &client->dev;  in ltr390_probe()
325 		return -ENOMEM;  in ltr390_probe()
329 	data->regmap = devm_regmap_init_i2c(client, &ltr390_regmap_config);  in ltr390_probe()
330 	if (IS_ERR(data->regmap))  in ltr390_probe()
331 		return dev_err_probe(dev, PTR_ERR(data->regmap),  in ltr390_probe()
334 	data->client = client;  in ltr390_probe()
336 	data->int_time_us = 100000;  in ltr390_probe()
338 	data->gain = 3;  in ltr390_probe()
340 	data->mode = LTR390_SET_ALS_MODE;  in ltr390_probe()
342 	mutex_init(&data->lock);  in ltr390_probe()
344 	indio_dev->info = &ltr390_info;  in ltr390_probe()
345 	indio_dev->channels = ltr390_channels;  in ltr390_probe()
346 	indio_dev->num_channels = ARRAY_SIZE(ltr390_channels);  in ltr390_probe()
347 	indio_dev->name = "ltr390";  in ltr390_probe()
349 	ret = regmap_read(data->regmap, LTR390_PART_ID, &part_number);  in ltr390_probe()
359 	regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SW_RESET);  in ltr390_probe()
364 	ret = regmap_set_bits(data->regmap, LTR390_MAIN_CTRL, LTR390_SENSOR_ENABLE);  in ltr390_probe()
394 MODULE_DESCRIPTION("Lite-On LTR390 ALS and UV sensor Driver");