28 static int adc128_adc_conversion(struct adc128 *adc, u8 channel)  in adc128_adc_conversion()  argument
32 	mutex_lock(&adc->lock);  in adc128_adc_conversion()
34 	adc->buffer[0] = channel << 3;  in adc128_adc_conversion()
35 	adc->buffer[1] = 0;  in adc128_adc_conversion()
37 	ret = spi_write(adc->spi, &adc->buffer, 2);  in adc128_adc_conversion()
39 		mutex_unlock(&adc->lock);  in adc128_adc_conversion()
43 	ret = spi_read(adc->spi, &adc->buffer, 2);  in adc128_adc_conversion()
45 	mutex_unlock(&adc->lock);  in adc128_adc_conversion()
50 	return ((adc->buffer[0] << 8 | adc->buffer[1]) & 0xFFF);  in adc128_adc_conversion()
57 	struct adc128 *adc = iio_priv(indio_dev);  in adc128_read_raw()  local
63 		ret = adc128_adc_conversion(adc, channel->channel);  in adc128_read_raw()
72 		ret = regulator_get_voltage(adc->reg);  in adc128_read_raw()
114 	struct adc128 *adc;  in adc128_probe()  local
117 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));  in adc128_probe()
121 	adc = iio_priv(indio_dev);  in adc128_probe()
122 	adc->spi = spi;  in adc128_probe()
134 	adc->reg = devm_regulator_get(&spi->dev, "vref");  in adc128_probe()
135 	if (IS_ERR(adc->reg))  in adc128_probe()
136 		return PTR_ERR(adc->reg);  in adc128_probe()
138 	ret = regulator_enable(adc->reg);  in adc128_probe()
142 	mutex_init(&adc->lock);  in adc128_probe()
152 	struct adc128 *adc = iio_priv(indio_dev);  in adc128_remove()  local
155 	regulator_disable(adc->reg);  in adc128_remove()