44 static int adc128_adc_conversion(struct adc128 *adc, u8 channel)  in adc128_adc_conversion()  argument
48 	guard(mutex)(&adc->lock);  in adc128_adc_conversion()
50 	adc->buffer[0] = channel << 3;  in adc128_adc_conversion()
51 	adc->buffer[1] = 0;  in adc128_adc_conversion()
53 	ret = spi_write(adc->spi, &adc->buffer, sizeof(adc->buffer));  in adc128_adc_conversion()
57 	ret = spi_read(adc->spi, &adc->buffer16, sizeof(adc->buffer16));  in adc128_adc_conversion()
61 	return be16_to_cpu(adc->buffer16) & 0xFFF;  in adc128_adc_conversion()
68 	struct adc128 *adc = iio_priv(indio_dev);  in adc128_read_raw()  local
74 		ret = adc128_adc_conversion(adc, channel->channel);  in adc128_read_raw()
83 		*val = adc->vref_mv;  in adc128_read_raw()
157 	struct adc128 *adc;  in adc128_probe()  local
160 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));  in adc128_probe()
164 	adc = iio_priv(indio_dev);  in adc128_probe()
165 	adc->spi = spi;  in adc128_probe()
183 	adc->vref_mv = ret / 1000;  in adc128_probe()
194 	ret = devm_mutex_init(&spi->dev, &adc->lock);  in adc128_probe()