ADC_INPUT_CH3
afe_read_byte(dev, ADC_INPUT_CH3, &value);
afe_write_byte(dev, ADC_INPUT_CH3, value);
status = afe_read_byte(dev, ADC_INPUT_CH3, &value);
status = afe_write_byte(dev, ADC_INPUT_CH3, value);
status = afe_read_byte(dev, ADC_INPUT_CH3, &input_mode);