Add a switch which can be used to enable/disable the DAC high-pass-filter.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
        SOC_SINGLE_TLV("Master Playback Volume", SSM4567_REG_DAC_VOLUME, 0,
                0xff, 1, ssm4567_vol_tlv),
        SOC_SINGLE("DAC Low Power Mode Switch", SSM4567_REG_DAC_CTRL, 4, 1, 0),
+       SOC_SINGLE("DAC High Pass Filter Switch", SSM4567_REG_DAC_CTRL,
+               5, 1, 0),
 };
 
 static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = {