AD1843_DAC2_TO_MIXER
reg = AD1843_DAC2_TO_MIXER + mc->dev - AD1843_DAC2_GAIN;
reg = AD1843_DAC2_TO_MIXER + mc->dev - AD1843_DAC2_MUTE;
reg = AD1843_DAC2_TO_MIXER + mc->dev - AD1843_DAC2_GAIN;
reg = AD1843_DAC2_TO_MIXER + mc->dev - AD1843_DAC2_MUTE;