1 // SPDX-License-Identifier: GPL-2.0
3  * ROHM BH1745 digital colour sensor driver
7  * 7-bit I2C slave addresses:
25 #include <linux/iio/iio-gts-helper.h>
227 	return regmap_set_bits(data->regmap, BH1745_SYS_CTRL,  in bh1745_reset()
234 	return regmap_set_bits(data->regmap, BH1745_MODE_CTRL2,  in bh1745_power_on()
241 	struct device *dev = data->dev;  in bh1745_power_off()
244 	ret = regmap_clear_bits(data->regmap, BH1745_MODE_CTRL2,  in bh1745_power_off()
258 	ret = regmap_read(data->regmap, BH1745_MODE_CTRL2, &value);  in bh1745_get_scale()
263 	gain = iio_gts_find_gain_by_sel(&data->gts, gain_sel);  in bh1745_get_scale()
265 	ret = regmap_read(data->regmap, BH1745_MODE_CTRL1, &value);  in bh1745_get_scale()
270 	int_time = iio_gts_find_itime_by_sel(&data->gts, int_time_sel);  in bh1745_get_scale()
272 	return iio_gts_get_scale(&data->gts, gain, int_time->time_us, val,  in bh1745_get_scale()
278 	struct device *dev = data->dev;  in bh1745_set_scale()
283 	ret = regmap_read(data->regmap, BH1745_MODE_CTRL1, &value);  in bh1745_set_scale()
289 	ret = iio_gts_find_gain_sel_for_scale_using_time(&data->gts,  in bh1745_set_scale()
293 		for (int i = 0; i < data->gts.num_itime; i++) {  in bh1745_set_scale()
294 			new_int_time_sel = data->gts.itime_table[i].sel;  in bh1745_set_scale()
299 			ret = iio_gts_find_gain_sel_for_scale_using_time(&data->gts,  in bh1745_set_scale()
310 			return -EINVAL;  in bh1745_set_scale()
313 		ret = regmap_write_bits(data->regmap, BH1745_MODE_CTRL1,  in bh1745_set_scale()
320 	return regmap_write_bits(data->regmap, BH1745_MODE_CTRL2,  in bh1745_set_scale()
330 	ret = regmap_read(data->regmap, BH1745_MODE_CTRL1, &value);  in bh1745_get_int_time()
335 	int_time = iio_gts_find_int_time_by_sel(&data->gts, int_time_sel);  in bh1745_get_int_time()
346 	struct device *dev = data->dev;  in bh1745_set_int_time()
353 	if (!iio_gts_valid_time(&data->gts, req_int_time)) {  in bh1745_set_int_time()
356 		return -EINVAL;  in bh1745_set_int_time()
366 	ret = regmap_read(data->regmap, BH1745_MODE_CTRL2, &value);  in bh1745_set_int_time()
371 	current_hwgain = iio_gts_find_gain_by_sel(&data->gts,  in bh1745_set_int_time()
373 	ret = iio_gts_find_new_gain_by_old_gain_time(&data->gts, current_hwgain,  in bh1745_set_int_time()
385 		new_hwgain = iio_find_closest_gain_low(&data->gts, new_hwgain,  in bh1745_set_int_time()
388 			new_hwgain = iio_gts_get_min_gain(&data->gts);  in bh1745_set_int_time()
399 	new_hwgain_sel = iio_gts_find_sel_by_gain(&data->gts, new_hwgain);  in bh1745_set_int_time()
403 	ret = regmap_write_bits(data->regmap, BH1745_MODE_CTRL2,  in bh1745_set_int_time()
409 	new_int_time_sel = iio_gts_find_sel_by_int_time(&data->gts,  in bh1745_set_int_time()
414 	return regmap_write_bits(data->regmap, BH1745_MODE_CTRL1,  in bh1745_set_int_time()
429 		iio_device_claim_direct_scoped(return -EBUSY, indio_dev) {  in bh1745_read_raw()
430 			ret = regmap_bulk_read(data->regmap, chan->address,  in bh1745_read_raw()
441 			guard(mutex)(&data->lock);  in bh1745_read_raw()
450 			guard(mutex)(&data->lock);  in bh1745_read_raw()
460 		return -EINVAL;  in bh1745_read_raw()
470 	guard(mutex)(&data->lock);  in bh1745_write_raw()
479 		return -EINVAL;  in bh1745_write_raw()
495 		return -EINVAL;  in bh1745_write_raw_get_fmt()
512 			ret = regmap_bulk_read(data->regmap, BH1745_TH_LSB,  in bh1745_read_thresh()
520 			ret = regmap_bulk_read(data->regmap, BH1745_TL_LSB,  in bh1745_read_thresh()
528 			return -EINVAL;  in bh1745_read_thresh()
532 		ret = regmap_read(data->regmap, BH1745_PERSISTENCE, val);  in bh1745_read_thresh()
539 		return -EINVAL;  in bh1745_read_thresh()
555 			return -EINVAL;  in bh1745_write_thresh()
559 			ret = regmap_bulk_write(data->regmap, BH1745_TH_LSB,  in bh1745_write_thresh()
567 			ret = regmap_bulk_write(data->regmap, BH1745_TL_LSB,  in bh1745_write_thresh()
575 			return -EINVAL;  in bh1745_write_thresh()
581 			return -EINVAL;  in bh1745_write_thresh()
582 		ret = regmap_write(data->regmap, BH1745_PERSISTENCE, val);  in bh1745_write_thresh()
589 		return -EINVAL;  in bh1745_write_thresh()
603 	ret = regmap_read(data->regmap, BH1745_INTR, &value);  in bh1745_read_event_config()
612 	switch (chan->channel2) {  in bh1745_read_event_config()
634 		return -EINVAL;  in bh1745_read_event_config()
647 		return regmap_clear_bits(data->regmap,  in bh1745_write_event_config()
653 	switch (chan->channel2) {  in bh1745_write_event_config()
655 		return regmap_write(data->regmap, BH1745_INTR,  in bh1745_write_event_config()
660 		return regmap_write(data->regmap, BH1745_INTR,  in bh1745_write_event_config()
665 		return regmap_write(data->regmap, BH1745_INTR,  in bh1745_write_event_config()
670 		return regmap_write(data->regmap, BH1745_INTR,  in bh1745_write_event_config()
675 		return -EINVAL;  in bh1745_write_event_config()
687 		return iio_gts_avail_times(&data->gts, vals, type, length);  in bh1745_read_avail()
690 		return iio_gts_all_avail_scales(&data->gts, vals, type, length);  in bh1745_read_avail()
693 		return -EINVAL;  in bh1745_read_avail()
716 	ret = regmap_read(data->regmap, BH1745_INTR, &value);  in bh1745_interrupt_handler()
738 	struct iio_dev *indio_dev = pf->indio_dev;  in bh1745_trigger_handler()
752 		ret = regmap_bulk_read(data->regmap, BH1745_RED_LSB + 2 * i,  in bh1745_trigger_handler()
764 	iio_trigger_notify_done(indio_dev->trig);  in bh1745_trigger_handler()
774 	struct device *dev = data->dev;  in bh1745_setup_triggered_buffer()
799 	struct device *dev = data->dev;  in bh1745_init()
801 	mutex_init(&data->lock);  in bh1745_init()
805 				    ARRAY_SIZE(bh1745_itimes), &data->gts);  in bh1745_init()
811 		return dev_err_probe(dev, ret, "Failed to reset sensor\n");  in bh1745_init()
815 		return dev_err_probe(dev, ret, "Failed to turn on sensor\n");  in bh1745_init()
832 	struct device *dev = &client->dev;  in bh1745_probe()
836 		return -ENOMEM;  in bh1745_probe()
838 	indio_dev->info = &bh1745_info;  in bh1745_probe()
839 	indio_dev->name = "bh1745";  in bh1745_probe()
840 	indio_dev->channels = bh1745_channels;  in bh1745_probe()
841 	indio_dev->modes = INDIO_DIRECT_MODE;  in bh1745_probe()
842 	indio_dev->num_channels = ARRAY_SIZE(bh1745_channels);  in bh1745_probe()
844 	data->dev = &client->dev;  in bh1745_probe()
845 	data->regmap = devm_regmap_init_i2c(client, &bh1745_regmap);  in bh1745_probe()
846 	if (IS_ERR(data->regmap))  in bh1745_probe()
847 		return dev_err_probe(dev, PTR_ERR(data->regmap),  in bh1745_probe()
850 	ret = regmap_read(data->regmap, BH1745_SYS_CTRL, &value);  in bh1745_probe()
867 	ret = bh1745_setup_triggered_buffer(indio_dev, indio_dev->dev.parent,  in bh1745_probe()
868 					    client->irq);  in bh1745_probe()
903 MODULE_DESCRIPTION("BH1745 colour sensor driver");