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Message-Id: <1433441299-18887-2-git-send-email-arun@gumstix.com>
Date: Thu, 4 Jun 2015 11:08:17 -0700
From: Arun Bharadwaj <arun@...stix.com>
To: BenoƮt Cousson <bcousson@...libre.com>,
Tony Lindgren <tony@...mide.com>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Russell King <linux@....linux.org.uk>,
linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Adam YH Lee <adam.yh.lee@...il.com>,
Ash Charles <ashcharles@...il.com>
Subject: [PATCH 1/3] ARM: dts: Correct audio input route & set mic bias
From: Adam YH Lee <adam.yh.lee@...il.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@...il.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 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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