From mboxrd@z Thu Jan 1 00:00:00 1970 From: adam.yh.lee@gmail.com (Adam YH Lee) Date: Tue, 14 Jul 2015 11:17:24 -0700 Subject: [PATCH V2] arm:DTS Correct audio input route & set mic bias Message-ID: <1436897844-6908-1-git-send-email-adam.yh.lee@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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