95 static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel,  in mcp320x_adc_conversion()  argument
100 	adc->rx_buf[0] = 0;  in mcp320x_adc_conversion()
101 	adc->rx_buf[1] = 0;  in mcp320x_adc_conversion()
102 	adc->tx_buf = mcp320x_channel_to_tx_data(device_index,  in mcp320x_adc_conversion()
106 		ret = spi_sync(adc->spi, &adc->msg);  in mcp320x_adc_conversion()
110 		ret = spi_read(adc->spi, &adc->rx_buf, sizeof(adc->rx_buf));  in mcp320x_adc_conversion()
117 		return (adc->rx_buf[0] << 5 | adc->rx_buf[1] >> 3);  in mcp320x_adc_conversion()
121 		return (adc->rx_buf[0] << 2 | adc->rx_buf[1] >> 6);  in mcp320x_adc_conversion()
123 		return (adc->rx_buf[0] << 7 | adc->rx_buf[1] >> 1);  in mcp320x_adc_conversion()
127 		return (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4);  in mcp320x_adc_conversion()
137 	struct mcp320x *adc = iio_priv(indio_dev);  in mcp320x_read_raw()  local
141 	mutex_lock(&adc->lock);  in mcp320x_read_raw()
143 	device_index = spi_get_device_id(adc->spi)->driver_data;  in mcp320x_read_raw()
147 		ret = mcp320x_adc_conversion(adc, channel->address,  in mcp320x_read_raw()
158 		ret = regulator_get_voltage(adc->reg);  in mcp320x_read_raw()
164 		*val2 = adc->chip_info->resolution;  in mcp320x_read_raw()
170 	mutex_unlock(&adc->lock);  in mcp320x_read_raw()
282 	struct mcp320x *adc;  in mcp320x_probe()  local
286 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));  in mcp320x_probe()
290 	adc = iio_priv(indio_dev);  in mcp320x_probe()
291 	adc->spi = spi;  in mcp320x_probe()
302 	adc->transfer[0].tx_buf = &adc->tx_buf;  in mcp320x_probe()
303 	adc->transfer[0].len = sizeof(adc->tx_buf);  in mcp320x_probe()
304 	adc->transfer[1].rx_buf = adc->rx_buf;  in mcp320x_probe()
305 	adc->transfer[1].len = sizeof(adc->rx_buf);  in mcp320x_probe()
307 	spi_message_init_with_transfers(&adc->msg, adc->transfer,  in mcp320x_probe()
308 					ARRAY_SIZE(adc->transfer));  in mcp320x_probe()
310 	adc->reg = devm_regulator_get(&spi->dev, "vref");  in mcp320x_probe()
311 	if (IS_ERR(adc->reg))  in mcp320x_probe()
312 		return PTR_ERR(adc->reg);  in mcp320x_probe()
314 	ret = regulator_enable(adc->reg);  in mcp320x_probe()
318 	mutex_init(&adc->lock);  in mcp320x_probe()
327 	regulator_disable(adc->reg);  in mcp320x_probe()
335 	struct mcp320x *adc = iio_priv(indio_dev);  in mcp320x_remove()  local
338 	regulator_disable(adc->reg);  in mcp320x_remove()