1 // SPDX-License-Identifier: GPL-2.0
92 	st->d8[0] = AD7292_RD_FLAG_MSK(addr);  in ad7292_spi_reg_read()
94 	ret = spi_write_then_read(st->spi, st->d8, 1, &st->d16, 2);  in ad7292_spi_reg_read()
98 	return be16_to_cpu(st->d16);  in ad7292_spi_reg_read()
104 	unsigned int shift = 16 - (8 * len);  in ad7292_spi_subreg_read()
107 	st->d8[0] = AD7292_RD_FLAG_MSK(addr);  in ad7292_spi_subreg_read()
108 	st->d8[1] = sub_addr;  in ad7292_spi_subreg_read()
110 	ret = spi_write_then_read(st->spi, st->d8, 2, &st->d16, len);  in ad7292_spi_subreg_read()
114 	return (be16_to_cpu(st->d16) >> shift);  in ad7292_spi_subreg_read()
124 			.tx_buf = &st->d8,  in ad7292_single_conversion()
131 			.rx_buf = &st->d16,  in ad7292_single_conversion()
136 	st->d8[0] = chan_addr;  in ad7292_single_conversion()
137 	st->d8[1] = AD7292_RD_FLAG_MSK(AD7292_REG_CONV_COMM);  in ad7292_single_conversion()
139 	ret = spi_sync_transfer(st->spi, t, ARRAY_SIZE(t));  in ad7292_single_conversion()
144 	return be16_to_cpu(st->d16);  in ad7292_single_conversion()
149 	int samp_mode, range0, range1, factor = 1;  in ad7292_vin_range_multiplier()  local
155 	 * may be increased by a multiplier factor of 2 or 4 according to the  in ad7292_vin_range_multiplier()
158 	 *	factor = 4 if VIN range0 and VIN range1 equal 0  in ad7292_vin_range_multiplier()
159 	 *	factor = 2 if only one of VIN ranges equal 1  in ad7292_vin_range_multiplier()
160 	 *	factor = 1 if both VIN range0 and VIN range1 equal 1  in ad7292_vin_range_multiplier()
162 	 *	factor = 4 if VIN range0 and VIN range1 equal 0  in ad7292_vin_range_multiplier()
187 			factor *= 2;  in ad7292_vin_range_multiplier()
190 			factor *= 2;  in ad7292_vin_range_multiplier()
196 			return -EPERM;  in ad7292_vin_range_multiplier()
198 		factor = 4;  in ad7292_vin_range_multiplier()
201 	return factor;  in ad7292_vin_range_multiplier()
214 		ch_addr = AD7292_REG_ADC_CH(chan->channel);  in ad7292_read_raw()
235 		ret = ad7292_vin_range_multiplier(st, chan->channel);  in ad7292_read_raw()
239 		*val = st->vref_mv * ret;  in ad7292_read_raw()
245 	return -EINVAL;  in ad7292_read_raw()
256 	regulator_disable(st->reg);  in ad7292_regulator_disable()
267 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));  in ad7292_probe()
269 		return -ENOMEM;  in ad7292_probe()
272 	st->spi = spi;  in ad7292_probe()
276 		dev_err(&spi->dev, "Wrong vendor id 0x%x\n", ret);  in ad7292_probe()
277 		return -EINVAL;  in ad7292_probe()
280 	st->reg = devm_regulator_get_optional(&spi->dev, "vref");  in ad7292_probe()
281 	if (!IS_ERR(st->reg)) {  in ad7292_probe()
282 		ret = regulator_enable(st->reg);  in ad7292_probe()
284 			dev_err(&spi->dev,  in ad7292_probe()
285 				"Failed to enable external vref supply\n");  in ad7292_probe()
289 		ret = devm_add_action_or_reset(&spi->dev,  in ad7292_probe()
294 		ret = regulator_get_voltage(st->reg);  in ad7292_probe()
298 		st->vref_mv = ret / 1000;  in ad7292_probe()
301 		st->vref_mv = 1250;  in ad7292_probe()
304 	indio_dev->name = spi_get_device_id(spi)->name;  in ad7292_probe()
305 	indio_dev->modes = INDIO_DIRECT_MODE;  in ad7292_probe()
306 	indio_dev->info = &ad7292_info;  in ad7292_probe()
308 	for_each_available_child_of_node(spi->dev.of_node, child) {  in ad7292_probe()
309 		diff_channels = of_property_read_bool(child, "diff-channels");  in ad7292_probe()
317 		indio_dev->num_channels = ARRAY_SIZE(ad7292_channels_diff);  in ad7292_probe()
318 		indio_dev->channels = ad7292_channels_diff;  in ad7292_probe()
320 		indio_dev->num_channels = ARRAY_SIZE(ad7292_channels);  in ad7292_probe()
321 		indio_dev->channels = ad7292_channels;  in ad7292_probe()
324 	return devm_iio_device_register(&spi->dev, indio_dev);  in ad7292_probe()