120 static int adc0831_adc_conversion(struct adc0832 *adc)  in adc0831_adc_conversion()  argument
122 	struct spi_device *spi = adc->spi;  in adc0831_adc_conversion()
125 	ret = spi_read(spi, &adc->rx_buf, 2);  in adc0831_adc_conversion()
132 	return (adc->rx_buf[0] << 2 & 0xff) | (adc->rx_buf[1] >> 6);  in adc0831_adc_conversion()
135 static int adc0832_adc_conversion(struct adc0832 *adc, int channel,  in adc0832_adc_conversion()  argument
138 	struct spi_device *spi = adc->spi;  in adc0832_adc_conversion()
140 		.tx_buf = adc->tx_buf,  in adc0832_adc_conversion()
141 		.rx_buf = adc->rx_buf,  in adc0832_adc_conversion()
146 	if (!adc->mux_bits)  in adc0832_adc_conversion()
147 		return adc0831_adc_conversion(adc);  in adc0832_adc_conversion()
150 	adc->tx_buf[0] = 1 << (adc->mux_bits + 1);  in adc0832_adc_conversion()
152 	adc->tx_buf[0] |= differential ? 0 : (1 << adc->mux_bits);  in adc0832_adc_conversion()
154 	adc->tx_buf[0] |= (channel % 2) << (adc->mux_bits - 1);  in adc0832_adc_conversion()
156 	if (adc->mux_bits > 1)  in adc0832_adc_conversion()
157 		adc->tx_buf[0] |= channel / 2;  in adc0832_adc_conversion()
160 	adc->tx_buf[0] <<= 1;  in adc0832_adc_conversion()
166 	return adc->rx_buf[1];  in adc0832_adc_conversion()
173 	struct adc0832 *adc = iio_priv(iio);  in adc0832_read_raw()  local
177 		mutex_lock(&adc->lock);  in adc0832_read_raw()
178 		*value = adc0832_adc_conversion(adc, channel->channel,  in adc0832_read_raw()
180 		mutex_unlock(&adc->lock);  in adc0832_read_raw()
186 		*value = regulator_get_voltage(adc->reg);  in adc0832_read_raw()
208 	struct adc0832 *adc = iio_priv(indio_dev);  in adc0832_trigger_handler()  local
212 	mutex_lock(&adc->lock);  in adc0832_trigger_handler()
218 		int ret = adc0832_adc_conversion(adc, scan_chan->channel,  in adc0832_trigger_handler()
221 			dev_warn(&adc->spi->dev,  in adc0832_trigger_handler()
226 		adc->data[i] = ret;  in adc0832_trigger_handler()
229 	iio_push_to_buffers_with_timestamp(indio_dev, adc->data,  in adc0832_trigger_handler()
232 	mutex_unlock(&adc->lock);  in adc0832_trigger_handler()
247 	struct adc0832 *adc;  in adc0832_probe()  local
250 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));  in adc0832_probe()
254 	adc = iio_priv(indio_dev);  in adc0832_probe()
255 	adc->spi = spi;  in adc0832_probe()
256 	mutex_init(&adc->lock);  in adc0832_probe()
264 		adc->mux_bits = 0;  in adc0832_probe()
269 		adc->mux_bits = 1;  in adc0832_probe()
274 		adc->mux_bits = 2;  in adc0832_probe()
279 		adc->mux_bits = 3;  in adc0832_probe()
287 	adc->reg = devm_regulator_get(&spi->dev, "vref");  in adc0832_probe()
288 	if (IS_ERR(adc->reg))  in adc0832_probe()
289 		return PTR_ERR(adc->reg);  in adc0832_probe()
291 	ret = regulator_enable(adc->reg);  in adc0832_probe()
296 				       adc->reg);  in adc0832_probe()