1 // SPDX-License-Identifier: GPL-2.0+
3  * si1133.c - Support for Silabs SI1133 combined ambient
6  * Copyright 2018 Maxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>
225 		{-2671, 234}
230 		{-1022, 36363},
232 		{ -367, 57909},
233 		{-1774, 38240},
234 		{ -608, 46775},
235 		{-1503, 51831},
236 		{-1886, 58928}
256 	shift = ((u16)coeffs->info & 0xFF00) >> 8;  in si1133_calculate_output()
259 	shift = -shift;  in si1133_calculate_output()
263 						       coeffs->mag, shift);  in si1133_calculate_output()
270 						       coeffs->mag, shift);  in si1133_calculate_output()
280  * https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00716
291 		if (coeffs->info < 0)  in si1133_calc_polynomial()
292 			sign = -1;  in si1133_calc_polynomial()
296 		x_order = si1133_get_x_order(coeffs->info);  in si1133_calc_polynomial()
297 		y_order = si1133_get_y_order(coeffs->info);  in si1133_calc_polynomial()
301 			       sign * coeffs->mag << SI1133_LUX_OUTPUT_FRACTION;  in si1133_calc_polynomial()
315 	struct device *dev = &data->client->dev;  in si1133_cmd_reset_sw()
320 	err = regmap_write(data->regmap, SI1133_REG_COMMAND,  in si1133_cmd_reset_sw()
327 		err = regmap_read(data->regmap, SI1133_REG_RESPONSE0, &resp);  in si1133_cmd_reset_sw()
328 		if (err == -ENXIO) {  in si1133_cmd_reset_sw()
339 			return -ETIMEDOUT;  in si1133_cmd_reset_sw()
344 		data->rsp_seq = SI1133_MAX_CMD_CTR;  in si1133_cmd_reset_sw()
356 		return -EOVERFLOW;  in si1133_parse_response_err()
360 		return -EOVERFLOW;  in si1133_parse_response_err()
365 		return -EINVAL;  in si1133_parse_response_err()
368 		return -EINVAL;  in si1133_parse_response_err()
371 		return -EINVAL;  in si1133_parse_response_err()
377 	int err = regmap_write(data->regmap, SI1133_REG_COMMAND,  in si1133_cmd_reset_counter()
382 	data->rsp_seq = 0;  in si1133_cmd_reset_counter()
389 	struct device *dev = &data->client->dev;  in si1133_command()
394 	mutex_lock(&data->mutex);  in si1133_command()
396 	expected_seq = (data->rsp_seq + 1) & SI1133_MAX_CMD_CTR;  in si1133_command()
399 		reinit_completion(&data->completion);  in si1133_command()
401 	err = regmap_write(data->regmap, SI1133_REG_COMMAND, cmd);  in si1133_command()
410 		if (!wait_for_completion_timeout(&data->completion,  in si1133_command()
412 			err = -ETIMEDOUT;  in si1133_command()
415 		err = regmap_read(data->regmap, SI1133_REG_RESPONSE0, &resp);  in si1133_command()
419 		err = regmap_read_poll_timeout(data->regmap,  in si1133_command()
438 		data->rsp_seq = expected_seq;  in si1133_command()
442 	mutex_unlock(&data->mutex);  in si1133_command()
449 	int err = regmap_write(data->regmap, SI1133_REG_HOSTIN0, value);  in si1133_param_set()
465 	return regmap_read(data->regmap, SI1133_REG_RESPONSE1, result);  in si1133_param_query()
470 	.channel = _ch, \
480 		.channel = 0,
527 	return -EINVAL;  in si1133_get_int_time_index()
539 	data->adc_sens[adc] &= 0xF0;  in si1133_set_integration_time()
540 	data->adc_sens[adc] |= index;  in si1133_set_integration_time()
543 				data->adc_sens[adc]);  in si1133_set_integration_time()
548 	/* channel list already set, no need to reprogram */  in si1133_set_chlist()
549 	if (data->scan_mask == scan_mask)  in si1133_set_chlist()
552 	data->scan_mask = scan_mask;  in si1133_set_chlist()
567 	data->adc_config[adc] = adc_config;  in si1133_chan_set_adcconfig()
589 static int si1133_set_adcmux(struct si1133_data *data, u8 adc, u8 mux)  in si1133_set_adcmux()  argument
591 	if ((mux & data->adc_config[adc]) == mux)  in si1133_set_adcmux()
592 		return 0; /* mux already set to correct value */  in si1133_set_adcmux()
594 	return si1133_update_adcconfig(data, adc, SI1133_ADCMUX_MASK, 0, mux);  in si1133_set_adcmux()
611 	return regmap_bulk_read(data->regmap, start_reg, buffer, length);  in si1133_bulk_read()
622 	err = si1133_set_adcmux(data, 0, chan->channel);  in si1133_measure()
648 	err = regmap_read(data->regmap, SI1133_REG_IRQ_STATUS, &irq_status);  in si1133_threaded_irq_handler()
650 		dev_err_ratelimited(&iio_dev->dev, "Error reading IRQ\n");  in si1133_threaded_irq_handler()
654 	if (irq_status != data->scan_mask)  in si1133_threaded_irq_handler()
658 	complete(&data->completion);  in si1133_threaded_irq_handler()
670 		return -EINVAL;  in si1133_scale_to_swgain()
684 	data->adc_sens[adc] = adc_sens;  in si1133_chan_set_adcsens()
752 	u8 adc_sens = data->adc_sens[0];  in si1133_read_raw()
757 		switch (chan->type) {  in si1133_read_raw()
765 			return -EINVAL;  in si1133_read_raw()
768 		switch (chan->type) {  in si1133_read_raw()
777 			return -EINVAL;  in si1133_read_raw()
780 		switch (chan->type) {  in si1133_read_raw()
789 			return -EINVAL;  in si1133_read_raw()
792 		switch (chan->type) {  in si1133_read_raw()
802 			return -EINVAL;  in si1133_read_raw()
805 		switch (chan->type) {  in si1133_read_raw()
814 			return -EINVAL;  in si1133_read_raw()
817 		return -EINVAL;  in si1133_read_raw()
829 		switch (chan->type) {  in si1133_write_raw()
841 			return -EINVAL;  in si1133_write_raw()
846 		switch (chan->type) {  in si1133_write_raw()
850 				return -EINVAL;  in si1133_write_raw()
857 			return -EINVAL;  in si1133_write_raw()
860 		return -EINVAL;  in si1133_write_raw()
881  * si1133_init_lux_channels - Configure 3 different channels(adc) (1,2 and 3)
882  * The channel configuration for the lux measurement was taken from :
883  * https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00578
885  * Reserved the channel 0 for the other raw measurements
957 	return regmap_write(data->regmap, SI1133_REG_IRQ_ENABLE,  in si1133_initialize()
968 	err = regmap_read(data->regmap, SI1133_REG_PART_ID, &part_id);  in si1133_validate_ids()
972 	err = regmap_read(data->regmap, SI1133_REG_REV_ID, &rev_id);  in si1133_validate_ids()
976 	err = regmap_read(data->regmap, SI1133_REG_MFR_ID, &mfr_id);  in si1133_validate_ids()
980 	dev_info(&iio_dev->dev,  in si1133_validate_ids()
984 		dev_err(&iio_dev->dev,  in si1133_validate_ids()
987 		return -ENODEV;  in si1133_validate_ids()
1000 	iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in si1133_probe()
1002 		return -ENOMEM;  in si1133_probe()
1006 	init_completion(&data->completion);  in si1133_probe()
1008 	data->regmap = devm_regmap_init_i2c(client, &si1133_regmap_config);  in si1133_probe()
1009 	if (IS_ERR(data->regmap)) {  in si1133_probe()
1010 		err = PTR_ERR(data->regmap);  in si1133_probe()
1011 		dev_err(&client->dev, "Failed to initialise regmap: %d\n", err);  in si1133_probe()
1016 	data->client = client;  in si1133_probe()
1018 	iio_dev->name = id->name;  in si1133_probe()
1019 	iio_dev->channels = si1133_channels;  in si1133_probe()
1020 	iio_dev->num_channels = ARRAY_SIZE(si1133_channels);  in si1133_probe()
1021 	iio_dev->info = &si1133_info;  in si1133_probe()
1022 	iio_dev->modes = INDIO_DIRECT_MODE;  in si1133_probe()
1024 	mutex_init(&data->mutex);  in si1133_probe()
1032 		dev_err(&client->dev,  in si1133_probe()
1037 	if (!client->irq) {  in si1133_probe()
1038 		dev_err(&client->dev,  in si1133_probe()
1040 		return -EINVAL;  in si1133_probe()
1043 	err = devm_request_threaded_irq(&client->dev, client->irq,  in si1133_probe()
1047 					client->name, iio_dev);  in si1133_probe()
1049 		dev_warn(&client->dev, "Request irq %d failed: %i\n",  in si1133_probe()
1050 			 client->irq, err);  in si1133_probe()
1054 	return devm_iio_device_register(&client->dev, iio_dev);  in si1133_probe()
1073 MODULE_AUTHOR("Maxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>");