[PATCH] ASoC: Automatically manage WM8996 MICBIAS regulating mode

[PATCH] ASoC: Automatically manage WM8996 MICBIAS regulating mode

[Mark Brown]

For non-audio uses like accessory detection we can use a lower quality,
unregulated microphone bias, saving a little power. As the hardware can
manually enable and disable the biases we can select regulating mode
automatically with supply widgets connected to the biases.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
 sound/soc/codecs/wm8996.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
index 0936ae5..d3277d1 100644
--- a/sound/soc/codecs/wm8996.c
+++ b/sound/soc/codecs/wm8996.c
@@ -982,6 +982,8 @@ SND_SOC_DAPM_SUPPLY_S("Charge Pump", 2, WM8996_CHARGE_PUMP_1, 15, 0, cp_event,
 		      SND_SOC_DAPM_POST_PMU),
 
 SND_SOC_DAPM_SUPPLY("LDO2", WM8996_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
+SND_SOC_DAPM_SUPPLY("MICB1 Audio", WM8996_MICBIAS_1, 4, 1, NULL, 0),
+SND_SOC_DAPM_SUPPLY("MICB2 Audio", WM8996_MICBIAS_2, 4, 1, NULL, 0),
 SND_SOC_DAPM_MICBIAS("MICB2", WM8996_POWER_MANAGEMENT_1, 9, 0),
 SND_SOC_DAPM_MICBIAS("MICB1", WM8996_POWER_MANAGEMENT_1, 8, 0),
 
@@ -1137,7 +1139,9 @@ static const struct snd_soc_dapm_route wm8996_dapm_routes[] = {
 	{ "Charge Pump", NULL, "SYSCLK" },
 
 	{ "MICB1", NULL, "LDO2" },
+	{ "MICB1", NULL, "MICB1 Audio" },
 	{ "MICB2", NULL, "LDO2" },
+	{ "MICB2", NULL, "MICB2 Audio" },
 
 	{ "IN1L PGA", NULL, "IN2LN" },
 	{ "IN1L PGA", NULL, "IN2LP" },
-- 
1.7.5.4

Re: [PATCH] ASoC: Automatically manage WM8996 MICBIAS regulating mode

[Liam Girdwood]

On 20/08/11 19:05, Mark Brown wrote:
> For non-audio uses like accessory detection we can use a lower quality,
> unregulated microphone bias, saving a little power. As the hardware can
> manually enable and disable the biases we can select regulating mode
> automatically with supply widgets connected to the biases.
> 
> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
> ---
>  sound/soc/codecs/wm8996.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/sound/soc/codecs/wm8996.c b/sound/soc/codecs/wm8996.c
> index 0936ae5..d3277d1 100644
> --- a/sound/soc/codecs/wm8996.c
> +++ b/sound/soc/codecs/wm8996.c
> @@ -982,6 +982,8 @@ SND_SOC_DAPM_SUPPLY_S("Charge Pump", 2, WM8996_CHARGE_PUMP_1, 15, 0, cp_event,
>  		      SND_SOC_DAPM_POST_PMU),
>  
>  SND_SOC_DAPM_SUPPLY("LDO2", WM8996_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
> +SND_SOC_DAPM_SUPPLY("MICB1 Audio", WM8996_MICBIAS_1, 4, 1, NULL, 0),
> +SND_SOC_DAPM_SUPPLY("MICB2 Audio", WM8996_MICBIAS_2, 4, 1, NULL, 0),
>  SND_SOC_DAPM_MICBIAS("MICB2", WM8996_POWER_MANAGEMENT_1, 9, 0),
>  SND_SOC_DAPM_MICBIAS("MICB1", WM8996_POWER_MANAGEMENT_1, 8, 0),
>  
> @@ -1137,7 +1139,9 @@ static const struct snd_soc_dapm_route wm8996_dapm_routes[] = {
>  	{ "Charge Pump", NULL, "SYSCLK" },
>  
>  	{ "MICB1", NULL, "LDO2" },
> +	{ "MICB1", NULL, "MICB1 Audio" },
>  	{ "MICB2", NULL, "LDO2" },
> +	{ "MICB2", NULL, "MICB2 Audio" },
>  
>  	{ "IN1L PGA", NULL, "IN2LN" },
>  	{ "IN1L PGA", NULL, "IN2LP" },

Acked-by: Liam Girdwood <lrg@ti.com>