audioinjector stereo

arch/arm64/boot/dts/rockchip/overlays-rockpi4/Makefile

@@ -13,6 +13,7 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP) += \
 	spi1-flash.dtbo \
 	hifiberry-dac.dtbo \
 	hifiberry-dacplus.dtbo \
+	audioinjector-wm8731-audio.dtbo \
 	raspberrypi-7-inch-lcd.dtbo \
 	gt9xx.dtbo \
 	cpufreq.dtbo \

arch/arm64/boot/dts/rockchip/overlays-rockpi4/audioinjector-wm8731-audio-overlay.dts

@@ -0,0 +1,45 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "rockchip,rk3399";
+
+	fragment@0 {
+		target = <&i2c7>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			wm8731@1a {
+				#sound-dai-cells = <0>;
+				compatible = "wlf,wm8731";
+				reg = <0x1a>;
+				AVDD-supply = <&vcc3v3_sys>;
+				HPVDD-supply = <&vcc3v3_sys>;
+				DCVDD-supply = <&vcc3v3_sys>;
+				DBVDD-supply = <&vcc3v3_sys>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@1 {
+		target-path = "/sound-ext-card";
+
+		 __overlay__ {
+			compatible = "ai,audioinjector-pi-soundcard";
+			i2s-controller = <&i2s1>;
+			status = "okay";
+		};
+	};
+
+	fragment@2 {
+		target = <&i2s1>;
+		__overlay__ {
+			status = "okay";
+			#sound-dai-cells = <0>;
+		};
+	};
+
+};

arch/arm64/boot/dts/rockchip/overlays-rockpi4/hw_intfc.conf

@@ -68,5 +68,8 @@ intfc:dtoverlay=console-on-ttyS2
 # Add ov5647 camera module support. Need disabled imx219 camera module.
 #intfc:dtoverlay=ov5647
 
+#audioinjector-wm8731-audio on I2C7. Need set: intfc:i2c7=on
+#intfc:dtoverlay=audioinjector-wm8731-audio
+
 # Add w1 on GPIO4_D6 to support devices such as DS18B20.
 #intfc:dtoverlay=w1-gpio4-30