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ASoC: ssm4567: Add support for disabling the boost stage 

This patch adds a switch to enable/disable boost stage of the output
amplifier. Applications that know that they do not need the output
amplifier boost stage can disable it to conserve a bit of power.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2014-11-06 15:59:24 +01:00 committed by Mark Brown
parent ead99f89b7
commit 5ad72152b6
1 changed files with 7 additions and 0 deletions
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7
sound/soc/codecs/ssm4567.c
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@ -165,13 +165,20 @@ static const struct snd_kcontrol_new ssm4567_snd_controls[] = {
5, 1, 0),
};
static const struct snd_kcontrol_new ssm4567_amplifier_boost_control =
SOC_DAPM_SINGLE("Switch", SSM4567_REG_POWER_CTRL, 1, 1, 1);
static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM4567_REG_POWER_CTRL, 2, 1),
SND_SOC_DAPM_SWITCH("Amplifier Boost", SSM4567_REG_POWER_CTRL, 3, 1,
&ssm4567_amplifier_boost_control),
SND_SOC_DAPM_OUTPUT("OUT"),
};
static const struct snd_soc_dapm_route ssm4567_routes[] = {
{ "OUT", NULL, "Amplifier Boost" },
{ "Amplifier Boost", "Switch", "DAC" },
{ "OUT", NULL, "DAC" },
};