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 --- sound/soc/codecs/ssm4567.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/sound/soc/codecs/ssm4567.c b/sound/soc/codecs/ssm4567.c index 2176679..a984485 100644 --- a/sound/soc/codecs/ssm4567.c +++ b/sound/soc/codecs/ssm4567.c @@ -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" }, };