Commit 9908ac3d authored Jul 14, 2015 by Adam YH Lee Committed by Tony Lindgren Jul 15, 2015

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>

parent f87d089d

arch/arm/boot/dts/am335x-pepper.dts

+2 −1

Original line number	Diff line number	Diff line
		@@ -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 {