108 	1, 2, 4, 8, 16, 32, 64, 128
112 	1, 2, 3, 3, 2, 1, 3, 3, 1, 2, 2, 2, 2,
162 	.indexed = 1,
163 	.differential = 1,
211 static int ad7124_spi_write_mask(struct ad7124_state *st,  in ad7124_spi_write_mask()  argument
220 	ret = ad_sd_read_reg(&st->sd, addr, bytes, &readval);  in ad7124_spi_write_mask()
227 	return ad_sd_write_reg(&st->sd, addr, bytes, readval);  in ad7124_spi_write_mask()
233 	struct ad7124_state *st = container_of(sd, struct ad7124_state, sd);  in ad7124_set_mode()  local
235 	st->adc_control &= ~AD7124_ADC_CTRL_MODE_MSK;  in ad7124_set_mode()
236 	st->adc_control |= AD7124_ADC_CTRL_MODE(mode);  in ad7124_set_mode()
238 	return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, st->adc_control);  in ad7124_set_mode()
243 	struct ad7124_state *st = container_of(sd, struct ad7124_state, sd);  in ad7124_set_channel()  local
246 	val = st->channel_config[channel].ain | AD7124_CHANNEL_EN(1) |  in ad7124_set_channel()
249 	return ad_sd_write_reg(&st->sd, AD7124_CHANNEL(channel), 2, val);  in ad7124_set_channel()
262 static int ad7124_set_channel_odr(struct ad7124_state *st,  in ad7124_set_channel_odr()  argument
269 	fclk = clk_get_rate(st->mclk);  in ad7124_set_channel_odr()
275 	 * FS[10:0] can have a value from 1 to 2047  in ad7124_set_channel_odr()
278 	if (odr_sel_bits < 1)  in ad7124_set_channel_odr()
279 		odr_sel_bits = 1;  in ad7124_set_channel_odr()
283 	ret = ad7124_spi_write_mask(st, AD7124_FILTER(channel),  in ad7124_set_channel_odr()
289 	st->channel_config[channel].odr =  in ad7124_set_channel_odr()
295 static int ad7124_set_channel_gain(struct ad7124_state *st,  in ad7124_set_channel_gain()  argument
304 	ret = ad7124_spi_write_mask(st, AD7124_CONFIG(channel),  in ad7124_set_channel_gain()
310 	st->channel_config[channel].pga_bits = res;  in ad7124_set_channel_gain()
315 static int ad7124_get_3db_filter_freq(struct ad7124_state *st,  in ad7124_get_3db_filter_freq()  argument
320 	fadc = st->channel_config[channel].odr;  in ad7124_get_3db_filter_freq()
322 	switch (st->channel_config[channel].filter_type) {  in ad7124_get_3db_filter_freq()
332 static int ad7124_set_3db_filter_freq(struct ad7124_state *st,  in ad7124_set_3db_filter_freq()  argument
352 	if (st->channel_config[channel].filter_type != new_filter) {  in ad7124_set_3db_filter_freq()
355 		st->channel_config[channel].filter_type = new_filter;  in ad7124_set_3db_filter_freq()
356 		ret = ad7124_spi_write_mask(st, AD7124_FILTER(channel),  in ad7124_set_3db_filter_freq()
364 	return ad7124_set_channel_odr(st, channel, new_odr);  in ad7124_set_3db_filter_freq()
371 	struct ad7124_state *st = iio_priv(indio_dev);  in ad7124_read_raw()  local
381 		ret = ad_sd_write_reg(&st->sd,  in ad7124_read_raw()
383 				      st->channel_config[chan->address].ain |  in ad7124_read_raw()
390 		idx = st->channel_config[chan->address].pga_bits;  in ad7124_read_raw()
391 		*val = st->channel_config[chan->address].vref_mv;  in ad7124_read_raw()
392 		if (st->channel_config[chan->address].bipolar)  in ad7124_read_raw()
393 			*val2 = chan->scan_type.realbits - 1 + idx;  in ad7124_read_raw()
399 		if (st->channel_config[chan->address].bipolar)  in ad7124_read_raw()
400 			*val = -(1 << (chan->scan_type.realbits - 1));  in ad7124_read_raw()
406 		*val = st->channel_config[chan->address].odr;  in ad7124_read_raw()
410 		*val = ad7124_get_3db_filter_freq(st, chan->scan_index);  in ad7124_read_raw()
421 	struct ad7124_state *st = iio_priv(indio_dev);  in ad7124_write_raw()  local
429 		return ad7124_set_channel_odr(st, chan->address, val);  in ad7124_write_raw()
434 		if (st->channel_config[chan->address].bipolar)  in ad7124_write_raw()
435 			full_scale = 1 << (chan->scan_type.realbits - 1);  in ad7124_write_raw()
437 			full_scale = 1 << chan->scan_type.realbits;  in ad7124_write_raw()
439 		vref = st->channel_config[chan->address].vref_mv * 1000000LL;  in ad7124_write_raw()
443 		return ad7124_set_channel_gain(st, chan->address, gain);  in ad7124_write_raw()
448 		return ad7124_set_3db_filter_freq(st, chan->address, val);  in ad7124_write_raw()
459 	struct ad7124_state *st = iio_priv(indio_dev);  in ad7124_reg_access()  local
466 		ret = ad_sd_read_reg(&st->sd, reg, ad7124_reg_size[reg],  in ad7124_reg_access()
469 		ret = ad_sd_write_reg(&st->sd, reg, ad7124_reg_size[reg],  in ad7124_reg_access()
495 static int ad7124_soft_reset(struct ad7124_state *st)  in ad7124_soft_reset()  argument
500 	ret = ad_sd_reset(&st->sd, 64);  in ad7124_soft_reset()
506 		ret = ad_sd_read_reg(&st->sd, AD7124_STATUS, 1, &readval);  in ad7124_soft_reset()
517 	dev_err(&st->sd.spi->dev, "Soft reset failed\n");  in ad7124_soft_reset()
522 static int ad7124_check_chip_id(struct ad7124_state *st)  in ad7124_check_chip_id()  argument
527 	ret = ad_sd_read_reg(&st->sd, AD7124_ID, 1, &readval);  in ad7124_check_chip_id()
534 	if (chip_id != st->chip_info->chip_id) {  in ad7124_check_chip_id()
535 		dev_err(&st->sd.spi->dev,  in ad7124_check_chip_id()
537 			st->chip_info->chip_id, chip_id);  in ad7124_check_chip_id()
542 		dev_err(&st->sd.spi->dev,  in ad7124_check_chip_id()
550 static int ad7124_init_channel_vref(struct ad7124_state *st,  in ad7124_init_channel_vref()  argument
553 	unsigned int refsel = st->channel_config[channel_number].refsel;  in ad7124_init_channel_vref()
559 		if (IS_ERR(st->vref[refsel])) {  in ad7124_init_channel_vref()
560 			dev_err(&st->sd.spi->dev,  in ad7124_init_channel_vref()
563 			return PTR_ERR(st->vref[refsel]);  in ad7124_init_channel_vref()
565 		st->channel_config[channel_number].vref_mv =  in ad7124_init_channel_vref()
566 			regulator_get_voltage(st->vref[refsel]);  in ad7124_init_channel_vref()
568 		st->channel_config[channel_number].vref_mv /= 1000;  in ad7124_init_channel_vref()
571 		st->channel_config[channel_number].vref_mv = 2500;  in ad7124_init_channel_vref()
572 		st->adc_control &= ~AD7124_ADC_CTRL_REF_EN_MSK;  in ad7124_init_channel_vref()
573 		st->adc_control |= AD7124_ADC_CTRL_REF_EN(1);  in ad7124_init_channel_vref()
574 		return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL,  in ad7124_init_channel_vref()
575 				      2, st->adc_control);  in ad7124_init_channel_vref()
577 		dev_err(&st->sd.spi->dev, "Invalid reference %d\n", refsel);  in ad7124_init_channel_vref()
587 	struct ad7124_state *st = iio_priv(indio_dev);  in ad7124_of_parse_channel_config()  local
594 	st->num_channels = of_get_available_child_count(np);  in ad7124_of_parse_channel_config()
595 	if (!st->num_channels) {  in ad7124_of_parse_channel_config()
600 	chan = devm_kcalloc(indio_dev->dev.parent, st->num_channels,  in ad7124_of_parse_channel_config()
605 	chan_config = devm_kcalloc(indio_dev->dev.parent, st->num_channels,  in ad7124_of_parse_channel_config()
611 	indio_dev->num_channels = st->num_channels;  in ad7124_of_parse_channel_config()
612 	st->channel_config = chan_config;  in ad7124_of_parse_channel_config()
624 		st->channel_config[channel].ain = AD7124_CHANNEL_AINP(ain[0]) |  in ad7124_of_parse_channel_config()
625 						  AD7124_CHANNEL_AINM(ain[1]);  in ad7124_of_parse_channel_config()
626 		st->channel_config[channel].bipolar =  in ad7124_of_parse_channel_config()
631 			st->channel_config[channel].refsel = AD7124_INT_REF;  in ad7124_of_parse_channel_config()
633 			st->channel_config[channel].refsel = tmp;  in ad7124_of_parse_channel_config()
635 		st->channel_config[channel].buf_positive =  in ad7124_of_parse_channel_config()
637 		st->channel_config[channel].buf_negative =  in ad7124_of_parse_channel_config()
644 		chan[channel].channel2 = ain[1];  in ad7124_of_parse_channel_config()
654 static int ad7124_setup(struct ad7124_state *st)  in ad7124_setup()  argument
659 	fclk = clk_get_rate(st->mclk);  in ad7124_setup()
668 		ret = clk_set_rate(st->mclk, fclk);  in ad7124_setup()
674 	st->adc_control &= ~AD7124_ADC_CTRL_PWR_MSK;  in ad7124_setup()
675 	st->adc_control |= AD7124_ADC_CTRL_PWR(power_mode);  in ad7124_setup()
676 	ret = ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL, 2, st->adc_control);  in ad7124_setup()
680 	for (i = 0; i < st->num_channels; i++) {  in ad7124_setup()
681 		val = st->channel_config[i].ain | AD7124_CHANNEL_SETUP(i);  in ad7124_setup()
682 		ret = ad_sd_write_reg(&st->sd, AD7124_CHANNEL(i), 2, val);  in ad7124_setup()
686 		ret = ad7124_init_channel_vref(st, i);  in ad7124_setup()
690 		tmp = (st->channel_config[i].buf_positive << 1)  +  in ad7124_setup()
691 			st->channel_config[i].buf_negative;  in ad7124_setup()
693 		val = AD7124_CONFIG_BIPOLAR(st->channel_config[i].bipolar) |  in ad7124_setup()
694 		      AD7124_CONFIG_REF_SEL(st->channel_config[i].refsel) |  in ad7124_setup()
696 		ret = ad_sd_write_reg(&st->sd, AD7124_CONFIG(i), 2, val);  in ad7124_setup()
704 		ret = ad7124_set_channel_odr(st, i, 10);  in ad7124_setup()
713 	struct ad7124_state *st;  in ad7124_probe()  local
721 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7124_probe()
725 	st = iio_priv(indio_dev);  in ad7124_probe()
727 	st->chip_info = info;  in ad7124_probe()
729 	ad_sd_init(&st->sd, indio_dev, spi, &ad7124_sigma_delta_info);  in ad7124_probe()
733 	indio_dev->name = st->chip_info->name;  in ad7124_probe()
741 	for (i = 0; i < ARRAY_SIZE(st->vref); i++) {  in ad7124_probe()
745 		st->vref[i] = devm_regulator_get_optional(&spi->dev,  in ad7124_probe()
747 		if (PTR_ERR(st->vref[i]) == -ENODEV)  in ad7124_probe()
749 		else if (IS_ERR(st->vref[i]))  in ad7124_probe()
750 			return PTR_ERR(st->vref[i]);  in ad7124_probe()
752 		ret = regulator_enable(st->vref[i]);  in ad7124_probe()
757 	st->mclk = devm_clk_get(&spi->dev, "mclk");  in ad7124_probe()
758 	if (IS_ERR(st->mclk)) {  in ad7124_probe()
759 		ret = PTR_ERR(st->mclk);  in ad7124_probe()
763 	ret = clk_prepare_enable(st->mclk);  in ad7124_probe()
767 	ret = ad7124_soft_reset(st);  in ad7124_probe()
771 	ret = ad7124_check_chip_id(st);  in ad7124_probe()
775 	ret = ad7124_setup(st);  in ad7124_probe()
794 	clk_disable_unprepare(st->mclk);  in ad7124_probe()
796 	for (i = ARRAY_SIZE(st->vref) - 1; i >= 0; i--) {  in ad7124_probe()
797 		if (!IS_ERR_OR_NULL(st->vref[i]))  in ad7124_probe()
798 			regulator_disable(st->vref[i]);  in ad7124_probe()
807 	struct ad7124_state *st = iio_priv(indio_dev);  in ad7124_remove()  local
812 	clk_disable_unprepare(st->mclk);  in ad7124_remove()
814 	for (i = ARRAY_SIZE(st->vref) - 1; i >= 0; i--) {  in ad7124_remove()
815 		if (!IS_ERR_OR_NULL(st->vref[i]))  in ad7124_remove()
816 			regulator_disable(st->vref[i]);  in ad7124_remove()