[1/3] ARM: dts: Correct audio input route & set mic bias
diff mbox

Message ID 1433441299-18887-2-git-send-email-arun@gumstix.com
State New
Headers show

Commit Message

Arun Bharadwaj June 4, 2015, 6:08 p.m. UTC
From: Adam YH Lee <adam.yh.lee@gmail.com>

Audio-in was incorrectly routed to Line In. It should be Mic3L as per
schematic.

Using mic-bias voltage at 2.0v (<0x1>) does not work for some reason. There
is no voltage seen on micbias (R127). Mic-bias voltage of 2.5v (<0x2>) works.
I see voltage of 2.475v across GND and micbias.

With these changes, I can record audio with a pair of proliferate TRRS earbuds.

Signed-off-by: Ash Charles <ashcharles@gmail.com>
---
 arch/arm/boot/dts/am335x-pepper.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Comments

Tony Lindgren July 14, 2015, 6:57 a.m. UTC | #1
* Arun Bharadwaj <arun@gumstix.com> [150604 11:10]:
> From: Adam YH Lee <adam.yh.lee@gmail.com>
> 
> Audio-in was incorrectly routed to Line In. It should be Mic3L as per
> schematic.
> 
> Using mic-bias voltage at 2.0v (<0x1>) does not work for some reason. There
> is no voltage seen on micbias (R127). Mic-bias voltage of 2.5v (<0x2>) works.
> I see voltage of 2.475v across GND and micbias.
> 
> With these changes, I can record audio with a pair of proliferate TRRS earbuds.
> 
> Signed-off-by: Ash Charles <ashcharles@gmail.com>

Can you please repost this with after checking From
and Signed-off-by?

Regards,

Tony

> ---
>  arch/arm/boot/dts/am335x-pepper.dts | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/am335x-pepper.dts b/arch/arm/boot/dts/am335x-pepper.dts
> index 0d35ab6..473d8ee 100644
> --- a/arch/arm/boot/dts/am335x-pepper.dts
> +++ b/arch/arm/boot/dts/am335x-pepper.dts
> @@ -74,6 +74,7 @@
>  	audio_codec: tlv320aic3106@1b {
>  		compatible = "ti,tlv320aic3106";
>  		reg = <0x1b>;
> +		ai3x-micbias-vg = <0x2>;
>  	};
>  
>  	accel: lis331dlh@1d {
> @@ -153,7 +154,7 @@
>  	ti,audio-routing =
>  		"Headphone Jack",	"HPLOUT",
>  		"Headphone Jack",	"HPROUT",
> -		"LINE1L",		"Line In";
> +		"MIC3L",		"Mic3L Switch";
>  };
>  
>  &mcasp0 {
> -- 
> 2.1.4
> 
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Patch
diff mbox

diff --git a/arch/arm/boot/dts/am335x-pepper.dts b/arch/arm/boot/dts/am335x-pepper.dts
index 0d35ab6..473d8ee 100644
--- a/arch/arm/boot/dts/am335x-pepper.dts
+++ b/arch/arm/boot/dts/am335x-pepper.dts
@@ -74,6 +74,7 @@ 
 	audio_codec: tlv320aic3106@1b {
 		compatible = "ti,tlv320aic3106";
 		reg = <0x1b>;
+		ai3x-micbias-vg = <0x2>;
 	};
 
 	accel: lis331dlh@1d {
@@ -153,7 +154,7 @@ 
 	ti,audio-routing =
 		"Headphone Jack",	"HPLOUT",
 		"Headphone Jack",	"HPROUT",
-		"LINE1L",		"Line In";
+		"MIC3L",		"Mic3L Switch";
 };
 
 &mcasp0 {