[PATCH V2] arm:DTS Correct audio input route & set mic bias
Adam YH Lee
adam.yh.lee at gmail.com
Tue Jul 14 11:17:24 PDT 2015
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 at gmail.com>
---
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 d627dc6..73b4cc3 100644
--- a/arch/arm/boot/dts/am335x-pepper.dts
+++ b/arch/arm/boot/dts/am335x-pepper.dts
@@ -74,6 +74,7 @@
audio_codec: tlv320aic3106 at 1b {
compatible = "ti,tlv320aic3106";
reg = <0x1b>;
+ ai3x-micbias-vg = <0x2>;
};
accel: lis331dlh at 1d {
@@ -152,7 +153,7 @@
ti,audio-routing =
"Headphone Jack", "HPLOUT",
"Headphone Jack", "HPROUT",
- "LINE1L", "Line In";
+ "MIC3L", "Mic3L Switch";
};
&mcasp0 {
--
2.1.4
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