1 // SPDX-License-Identifier: GPL-2.0
255 	int ret = i2c_smbus_write_byte_data(chip->client,  in ad7746_set_capdac()
257 					    chip->capdac[channel][0]);  in ad7746_set_capdac()
261 	return i2c_smbus_write_byte_data(chip->client,  in ad7746_set_capdac()
263 					  chip->capdac[channel][1]);  in ad7746_set_capdac()
273 	switch (chan->type) {  in ad7746_select_channel()
276 				       ad7746_chan_info[chan->address].cin2) |  in ad7746_select_channel()
278 				   ad7746_chan_info[chan->address].capdiff) |  in ad7746_select_channel()
280 		vt_setup = chip->vt_setup & ~AD7746_VTSETUP_VTEN;  in ad7746_select_channel()
281 		idx = FIELD_GET(AD7746_CONF_CAPFS_MASK, chip->config);  in ad7746_select_channel()
284 		ret = ad7746_set_capdac(chip, chan->channel);  in ad7746_select_channel()
288 		chip->capdac_set = chan->channel;  in ad7746_select_channel()
293 				      ad7746_chan_info[chan->address].vtmd) |  in ad7746_select_channel()
295 		cap_setup = chip->cap_setup & ~AD7746_CAPSETUP_CAPEN;  in ad7746_select_channel()
296 		idx = FIELD_GET(AD7746_CONF_VTFS_MASK, chip->config);  in ad7746_select_channel()
300 		return -EINVAL;  in ad7746_select_channel()
303 	if (chip->cap_setup != cap_setup) {  in ad7746_select_channel()
304 		ret = i2c_smbus_write_byte_data(chip->client,  in ad7746_select_channel()
310 		chip->cap_setup = cap_setup;  in ad7746_select_channel()
313 	if (chip->vt_setup != vt_setup) {  in ad7746_select_channel()
314 		ret = i2c_smbus_write_byte_data(chip->client,  in ad7746_select_channel()
320 		chip->vt_setup = vt_setup;  in ad7746_select_channel()
344 	mutex_lock(&chip->lock);  in ad7746_start_calib()
345 	regval |= chip->config;  in ad7746_start_calib()
346 	ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, regval);  in ad7746_start_calib()
352 		ret = i2c_smbus_read_byte_data(chip->client, AD7746_REG_CFG);  in ad7746_start_calib()
356 	} while ((ret == regval) && timeout--);  in ad7746_start_calib()
358 	mutex_unlock(&chip->lock);  in ad7746_start_calib()
363 	mutex_unlock(&chip->lock);  in ad7746_start_calib()
374 			      &ad7746_channels[to_iio_dev_attr(attr)->address]);  in ad7746_start_offset_calib()
390 			      &ad7746_channels[to_iio_dev_attr(attr)->address]);  in ad7746_start_gain_calib()
420 		i = ARRAY_SIZE(ad7746_cap_filter_rate_table) - 1;  in ad7746_store_cap_filter_rate_setup()
422 	chip->config &= ~AD7746_CONF_CAPFS_MASK;  in ad7746_store_cap_filter_rate_setup()
423 	chip->config |= FIELD_PREP(AD7746_CONF_CAPFS_MASK, i);  in ad7746_store_cap_filter_rate_setup()
438 		i = ARRAY_SIZE(ad7746_vt_filter_rate_table) - 1;  in ad7746_store_vt_filter_rate_setup()
440 	chip->config &= ~AD7746_CONF_VTFS_MASK;  in ad7746_store_vt_filter_rate_setup()
441 	chip->config |= FIELD_PREP(AD7746_CONF_VTFS_MASK, i);  in ad7746_store_vt_filter_rate_setup()
471 			return -EINVAL;  in ad7746_write_raw()
475 		switch (chan->type) {  in ad7746_write_raw()
483 			return -EINVAL;  in ad7746_write_raw()
486 		mutex_lock(&chip->lock);  in ad7746_write_raw()
487 		ret = i2c_smbus_write_word_swapped(chip->client, reg, val);  in ad7746_write_raw()
488 		mutex_unlock(&chip->lock);  in ad7746_write_raw()
495 			return -EINVAL;  in ad7746_write_raw()
497 		mutex_lock(&chip->lock);  in ad7746_write_raw()
498 		ret = i2c_smbus_write_word_swapped(chip->client,  in ad7746_write_raw()
500 		mutex_unlock(&chip->lock);  in ad7746_write_raw()
508 			return -EINVAL;  in ad7746_write_raw()
517 		mutex_lock(&chip->lock);  in ad7746_write_raw()
518 		chip->capdac[chan->channel][chan->differential] = val > 0 ?  in ad7746_write_raw()
521 		ret = ad7746_set_capdac(chip, chan->channel);  in ad7746_write_raw()
523 			mutex_unlock(&chip->lock);  in ad7746_write_raw()
527 		chip->capdac_set = chan->channel;  in ad7746_write_raw()
528 		mutex_unlock(&chip->lock);  in ad7746_write_raw()
533 			return -EINVAL;  in ad7746_write_raw()
535 		switch (chan->type) {  in ad7746_write_raw()
537 			mutex_lock(&chip->lock);  in ad7746_write_raw()
539 			mutex_unlock(&chip->lock);  in ad7746_write_raw()
542 			mutex_lock(&chip->lock);  in ad7746_write_raw()
544 			mutex_unlock(&chip->lock);  in ad7746_write_raw()
547 			return -EINVAL;  in ad7746_write_raw()
550 		return -EINVAL;  in ad7746_write_raw()
562 		return -EINVAL;  in ad7746_read_avail()
564 	switch (chan->type) {  in ad7746_read_avail()
574 		return -EINVAL;  in ad7746_read_avail()
594 	regval = chip->config | FIELD_PREP(AD7746_CONF_MODE_MASK,  in ad7746_read_channel()
596 	ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_CFG, regval);  in ad7746_read_channel()
602 	ret = i2c_smbus_read_i2c_block_data(chip->client,  in ad7746_read_channel()
603 					    ad7746_chan_info[chan->address].addr,  in ad7746_read_channel()
612 	*val = get_unaligned_be24(data) - 0x800000;  in ad7746_read_channel()
628 		mutex_lock(&chip->lock);  in ad7746_read_raw()
630 		mutex_unlock(&chip->lock);  in ad7746_read_raw()
636 		switch (chan->type) {  in ad7746_read_raw()
644 			return -EINVAL;  in ad7746_read_raw()
647 		mutex_lock(&chip->lock);  in ad7746_read_raw()
648 		ret = i2c_smbus_read_word_swapped(chip->client, reg);  in ad7746_read_raw()
649 		mutex_unlock(&chip->lock);  in ad7746_read_raw()
658 		mutex_lock(&chip->lock);  in ad7746_read_raw()
659 		ret = i2c_smbus_read_word_swapped(chip->client,  in ad7746_read_raw()
661 		mutex_unlock(&chip->lock);  in ad7746_read_raw()
670 				 chip->capdac[chan->channel][chan->differential]) * 338646;  in ad7746_read_raw()
674 		switch (chan->type) {  in ad7746_read_raw()
683 			if (chan->channel == 1)  in ad7746_read_raw()
692 			return -EINVAL;  in ad7746_read_raw()
695 		switch (chan->type) {  in ad7746_read_raw()
697 			idx = FIELD_GET(AD7746_CONF_CAPFS_MASK, chip->config);  in ad7746_read_raw()
701 			idx = FIELD_GET(AD7746_CONF_VTFS_MASK, chip->config);  in ad7746_read_raw()
705 			return -EINVAL;  in ad7746_read_raw()
708 		return -EINVAL;  in ad7746_read_raw()
722 	struct device *dev = &client->dev;  in ad7746_probe()
729 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));  in ad7746_probe()
731 		return -ENOMEM;  in ad7746_probe()
734 	mutex_init(&chip->lock);  in ad7746_probe()
736 	chip->client = client;  in ad7746_probe()
737 	chip->capdac_set = -1;  in ad7746_probe()
739 	indio_dev->name = id->name;  in ad7746_probe()
740 	indio_dev->info = &ad7746_info;  in ad7746_probe()
741 	indio_dev->channels = ad7746_channels;  in ad7746_probe()
742 	if (id->driver_data == 7746)  in ad7746_probe()
743 		indio_dev->num_channels = ARRAY_SIZE(ad7746_channels);  in ad7746_probe()
745 		indio_dev->num_channels =  ARRAY_SIZE(ad7746_channels) - 2;  in ad7746_probe()
746 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7746_probe()
748 	if (device_property_read_bool(dev, "adi,exca-output-en")) {  in ad7746_probe()
749 		if (device_property_read_bool(dev, "adi,exca-output-invert"))  in ad7746_probe()
755 	if (device_property_read_bool(dev, "adi,excb-output-en")) {  in ad7746_probe()
756 		if (device_property_read_bool(dev, "adi,excb-output-invert"))  in ad7746_probe()
762 	ret = device_property_read_u32(dev, "adi,excitation-vdd-permille",  in ad7746_probe()
783 	ret = i2c_smbus_write_byte_data(chip->client, AD7746_REG_EXC_SETUP,  in ad7746_probe()
788 	return devm_iio_device_register(indio_dev->dev.parent, indio_dev);  in ad7746_probe()