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ARM: dts: Correct audio input route & set mic bias for am335x-pepper 

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: Adam YH Lee <adam.yh.lee@gmail.com>
Acked-by: Ash Charles <ashcharles@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Adam YH Lee 2015-07-14 11:17:24 -07:00 committed by Tony Lindgren
parent f87d089d44
commit 9908ac3daa
1 changed files with 2 additions and 1 deletions
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3
arch/arm/boot/dts/am335x-pepper.dts
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@ -74,6 +74,7 @@ eeprom: eeprom@50 {
audio_codec: tlv320aic3106@1b {
compatible = "ti,tlv320aic3106";
reg = <0x1b>;
ai3x-micbias-vg = <0x2>;
};
accel: lis331dlh@1d {
@ -153,7 +154,7 @@ &sound {
ti,audio-routing =
"Headphone Jack", "HPLOUT",
"Headphone Jack", "HPROUT",
"LINE1L", "Line In";
"MIC3L", "Mic3L Switch";
};
&mcasp0 {