1 // SPDX-License-Identifier: GPL-2.0-only
175 	/* This driver only needs to write 8-bit registers */  in max11410_write_reg()
177 		return -EINVAL;  in max11410_write_reg()
179 	return regmap_write(st->regmap, reg, val);  in max11410_write_reg()
188 		ret = regmap_bulk_read(st->regmap, reg, &st->scan.data, 3);  in max11410_read_reg()
192 		*val = get_unaligned_be24(&st->scan.data);  in max11410_read_reg()
196 	return regmap_read(st->regmap, reg, val);  in max11410_read_reg()
204 		return st->avdd;  in max11410_get_vrefp()
206 	return st->vrefp[refsel];  in max11410_get_vrefp()
215 	return st->vrefn[refsel];  in max11410_get_vrefn()
238 	switch (iio_attr->address) {  in max11410_notch_en_show()
249 		return -EINVAL;  in max11410_notch_en_show()
270 	switch (iio_attr->address) {  in max11410_notch_en_store()
285 		ret = regmap_clear_bits(state->regmap, MAX11410_REG_FILTER,  in max11410_notch_en_store()
288 		ret = regmap_set_bits(state->regmap, MAX11410_REG_FILTER,  in max11410_notch_en_store()
305 	ret = regmap_read(state->regmap, MAX11410_REG_FILTER, &reg);  in in_voltage_filter2_notch_center_show()
311 			 max11410_sampling_len[MAX11410_FILTER_SINC4] - 1);  in in_voltage_filter2_notch_center_show()
346 		return -EINVAL;  in max11410_set_input_mux()
355 	struct max11410_channel_config cfg = st->channels[chan->address];  in max11410_configure_channel()
359 	if (chan->differential)  in max11410_configure_channel()
360 		ret = max11410_set_input_mux(st, chan->channel, chan->channel2);  in max11410_configure_channel()
362 		ret = max11410_set_input_mux(st, chan->channel,  in max11410_configure_channel()
372 	ret = regmap_update_bits(st->regmap, MAX11410_REG_CTRL,  in max11410_configure_channel()
382 	ret = regmap_write(st->regmap, MAX11410_REG_PGA, regval);  in max11410_configure_channel()
401 	if (st->irq > 0)  in max11410_sample()
402 		reinit_completion(&st->completion);  in max11410_sample()
410 	if (st->irq > 0) {  in max11410_sample()
412 		ret = wait_for_completion_timeout(&st->completion,  in max11410_sample()
415 			return -ETIMEDOUT;  in max11410_sample()
445 		scale -= regulator_get_voltage(vrefn) / 1000;  in max11410_get_scale()
458 	struct max11410_channel_config cfg = state->channels[chan->address];  in max11410_read_raw()
464 		*val2 = chan->scan_type.realbits;  in max11410_read_raw()
468 			*val = -BIT(chan->scan_type.realbits - 1);  in max11410_read_raw()
478 		mutex_lock(&state->lock);  in max11410_read_raw()
482 		mutex_unlock(&state->lock);  in max11410_read_raw()
493 		ret = regmap_read(state->regmap, MAX11410_REG_FILTER, &reg_val);  in max11410_read_raw()
500 			rate = max11410_sampling_len[filter] - 1;  in max11410_read_raw()
507 	return -EINVAL;  in max11410_read_raw()
520 		scale_avail = st->channels[chan->address].scale_avail;  in max11410_write_raw()
522 			return -EOPNOTSUPP;  in max11410_write_raw()
526 			return -EINVAL;  in max11410_write_raw()
537 		st->channels[chan->address].gain = clamp_val(gain, 0, 7);  in max11410_write_raw()
547 		mutex_lock(&st->lock);  in max11410_write_raw()
549 		ret = regmap_read(st->regmap, MAX11410_REG_FILTER, &reg_val);  in max11410_write_raw()
561 			ret = -EINVAL;  in max11410_write_raw()
565 		ret = regmap_write_bits(st->regmap, MAX11410_REG_FILTER,  in max11410_write_raw()
569 		mutex_unlock(&st->lock);  in max11410_write_raw()
574 		return -EINVAL;  in max11410_write_raw()
589 		ret = regmap_read(st->regmap, MAX11410_REG_FILTER, &reg_val);  in max11410_read_avail()
601 		cfg = st->channels[chan->address];  in max11410_read_avail()
604 			return -EINVAL;  in max11410_read_avail()
612 	return -EINVAL;  in max11410_read_avail()
622 static irqreturn_t max11410_trigger_handler(int irq, void *p)  in max11410_trigger_handler()  argument
624 	struct iio_poll_func *pf = p;  in max11410_trigger_handler()
625 	struct iio_dev *indio_dev = pf->indio_dev;  in max11410_trigger_handler()
629 	ret = max11410_read_reg(st, MAX11410_REG_DATA0, &st->scan.data);  in max11410_trigger_handler()
631 		dev_err(&indio_dev->dev, "cannot read data\n");  in max11410_trigger_handler()
635 	iio_push_to_buffers_with_timestamp(indio_dev, &st->scan,  in max11410_trigger_handler()
639 	iio_trigger_notify_done(indio_dev->trig);  in max11410_trigger_handler()
649 	scan_ch = ffs(*indio_dev->active_scan_mask) - 1;  in max11410_buffer_postenable()
651 	ret = max11410_configure_channel(st, &indio_dev->channels[scan_ch]);  in max11410_buffer_postenable()
685 		iio_trigger_poll_nested(st->trig);  in max11410_interrupt()
687 		complete(&st->completion);  in max11410_interrupt()
696 	struct device *dev = &st->spi_dev->dev;  in max11410_parse_channels()
708 		return dev_err_probe(&indio_dev->dev, -ENODEV,  in max11410_parse_channels()
715 		return -ENOMEM;  in max11410_parse_channels()
717 	st->channels = devm_kcalloc(dev, num_ch, sizeof(*st->channels),  in max11410_parse_channels()
719 	if (!st->channels)  in max11410_parse_channels()
720 		return -ENOMEM;  in max11410_parse_channels()
724 		if (fwnode_property_present(child, "diff-channels")) {  in max11410_parse_channels()
726 							     "diff-channels",  in max11410_parse_channels()
742 			return dev_err_probe(&indio_dev->dev, -EINVAL,  in max11410_parse_channels()
747 		cfg = &st->channels[chan_idx];  in max11410_parse_channels()
752 			return dev_err_probe(&indio_dev->dev, -EINVAL,  in max11410_parse_channels()
758 			return dev_err_probe(&indio_dev->dev, -EINVAL,  in max11410_parse_channels()
759 …"Invalid VREF configuration for %s, either specify corresponding VREF regulators or change adi,ref…  in max11410_parse_channels()
763 		fwnode_property_read_u32(child, "adi,input-mode", &sig_path);  in max11410_parse_channels()
765 			return dev_err_probe(&indio_dev->dev, -EINVAL,  in max11410_parse_channels()
766 					     "Invalid adi,input-mode value for %s, should be less than %d.\n",  in max11410_parse_channels()
769 		fwnode_property_read_u32(child, "settling-time-us",  in max11410_parse_channels()
770 					 &cfg->settling_time_us);  in max11410_parse_channels()
771 		cfg->bipolar = fwnode_property_read_bool(child, "bipolar");  in max11410_parse_channels()
772 		cfg->buffered_vrefp = fwnode_property_read_bool(child, "adi,buffered-vrefp");  in max11410_parse_channels()
773 		cfg->buffered_vrefn = fwnode_property_read_bool(child, "adi,buffered-vrefn");  in max11410_parse_channels()
774 		cfg->refsel = reference;  in max11410_parse_channels()
775 		cfg->sig_path = sig_path;  in max11410_parse_channels()
776 		cfg->gain = 0;  in max11410_parse_channels()
782 			cfg->scale_avail = devm_kcalloc(dev, MAX11410_SCALE_AVAIL_SIZE * 2,  in max11410_parse_channels()
783 							sizeof(*cfg->scale_avail),  in max11410_parse_channels()
785 			if (!cfg->scale_avail)  in max11410_parse_channels()
786 				return -ENOMEM;  in max11410_parse_channels()
790 				cfg->scale_avail[2 * i] = scale >> i;  in max11410_parse_channels()
791 				cfg->scale_avail[2 * i + 1] = chanspec.scan_type.realbits;  in max11410_parse_channels()
809 	indio_dev->num_channels = chan_idx + 1;  in max11410_parse_channels()
810 	indio_dev->channels = channels;  in max11410_parse_channels()
821 			      struct regulator **vref,  in max11410_init_vref()  argument
828 	if (PTR_ERR(reg) == -ENODEV) {  in max11410_init_vref()
829 		*vref = NULL;  in max11410_init_vref()
839 	*vref = reg;  in max11410_init_vref()
866 	ret = regmap_write_bits(st->regmap, MAX11410_REG_FILTER,  in max11410_self_calibrate()
877 	ret = regmap_write_bits(st->regmap, MAX11410_REG_PGA,  in max11410_self_calibrate()
886 		ret = regmap_write_bits(st->regmap, MAX11410_REG_PGA,  in max11410_self_calibrate()
897 	ret = regmap_write_bits(st->regmap, MAX11410_REG_PGA,  in max11410_self_calibrate()
902 	ret = regmap_write_bits(st->regmap, MAX11410_REG_FILTER,  in max11410_self_calibrate()
907 	return regmap_write_bits(st->regmap, MAX11410_REG_PGA,  in max11410_self_calibrate()
917 	struct device *dev = &spi->dev;  in max11410_probe()
925 		return -ENOMEM;  in max11410_probe()
928 	st->spi_dev = spi;  in max11410_probe()
929 	init_completion(&st->completion);  in max11410_probe()
930 	mutex_init(&st->lock);  in max11410_probe()
932 	indio_dev->name = "max11410";  in max11410_probe()
933 	indio_dev->modes = INDIO_DIRECT_MODE;  in max11410_probe()
934 	indio_dev->info = &max11410_info;  in max11410_probe()
936 	st->regmap = devm_regmap_init_spi(spi, &regmap_config);  in max11410_probe()
937 	if (IS_ERR(st->regmap))  in max11410_probe()
938 		return dev_err_probe(dev, PTR_ERR(st->regmap),  in max11410_probe()
941 	ret = max11410_init_vref(dev, &st->avdd, "avdd");  in max11410_probe()
946 		ret = max11410_init_vref(dev, &st->vrefp[i], vrefp_regs[i]);  in max11410_probe()
950 		ret = max11410_init_vref(dev, &st->vrefn[i], vrefn_regs[i]);  in max11410_probe()
967 		st->irq = irqs[0];  in max11410_probe()
968 		ret = regmap_write(st->regmap, MAX11410_REG_GPIO_CTRL(0),  in max11410_probe()
971 		st->irq = irqs[1];  in max11410_probe()
972 		ret = regmap_write(st->regmap, MAX11410_REG_GPIO_CTRL(1),  in max11410_probe()
974 	} else if (spi->irq > 0) {  in max11410_probe()
975 		return dev_err_probe(dev, -ENODEV,  in max11410_probe()
982 	ret = regmap_set_bits(st->regmap, MAX11410_REG_CTRL,  in max11410_probe()
993 	if (st->irq > 0) {  in max11410_probe()
994 		st->trig = devm_iio_trigger_alloc(dev, "%s-dev%d",  in max11410_probe()
995 						  indio_dev->name,  in max11410_probe()
997 		if (!st->trig)  in max11410_probe()
998 			return -ENOMEM;  in max11410_probe()
1000 		st->trig->ops = &max11410_trigger_ops;  in max11410_probe()
1001 		ret = devm_iio_trigger_register(dev, st->trig);  in max11410_probe()
1005 		ret = devm_request_threaded_irq(dev, st->irq, NULL,  in max11410_probe()