From: "J. Neuschäfer" <j.ne@posteo.net>

Line out playback and microphone capture work, after enabling the
corresponding ALSA controls. Tested with the Orange Pi Zero interface
board.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
---
v3:
- no change

v2:
- Add an explanatory comment
---
 .../arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts b/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
index 1b001f2ad0efd2e77218742efe6d8edfdd18a816..b23cec5b89ebf61701e1d917929589eb6e884afd 100644
--- a/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/allwinner/sun8i-h2-plus-orangepi-zero.dts
@@ -112,6 +112,20 @@ wifi_pwrseq: pwrseq {
 	};
 };
 
+/*
+ * Audio input/output is exposed on the 13-pin header and can't be used for
+ * anything else. However, adapter boards may use different audio routing.
+ * - https://linux-sunxi.org/Xunlong_Orange_Pi_Zero#Expansion_Port
+ * - Allwinner H3 Datasheet, section 3.1. Pin Characteristics
+ */
+&codec {
+	allwinner,audio-routing =
+		"Line Out", "LINEOUT",
+		"MIC1", "Mic",
+		"Mic",  "MBIAS";
+	status = "disabled";
+};
+
 &cpu0 {
 	cpu-supply = <&reg_vdd_cpux>;
 };

-- 
2.48.0.rc1.219.gb6b6757d772