[alsa-devel] [PATCH 3/3] ASoC: ssm4567: Add support for disabling the boost stage
Lars-Peter Clausen
lars at metafoo.de
Thu Nov 6 15:59:24 CET 2014
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 at 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" },
};
--
1.8.0
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