arm64: dts: meson: libretech-pc: add internal DAC support

Add the internal DAC support on the libretech CC. The output of this
DAC is provided on the 9J4 connector.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200506221656.477379-6-jbrunet@baylibre.com

arch/arm64/boot/dts/amlogic/meson-gx-libretech-pc.dtsi

@@ -30,6 +30,13 @@ aliases {
 		spi0 = &spifc;
 	};
 
+	dio2133: analog-amplifier {
+		compatible = "simple-audio-amplifier";
+		sound-name-prefix = "AU2";
+		VCC-supply = <&vcc5v>;
+		enable-gpios = <&gpio GPIOH_5 GPIO_ACTIVE_HIGH>;
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
@@ -180,6 +187,13 @@ vddio_card: regulator-vddio-card {
 	sound {
 		compatible = "amlogic,gx-sound-card";
 		model = "GXL-LIBRETECH-S9XX-PC";
+		audio-aux-devs = <&dio2133>;
+		audio-widgets = "Speaker", "7J4-14 LEFT",
+				"Speaker", "7J4-11 RIGHT";
+		audio-routing = "AU2 INL", "ACODEC LOLN",
+				"AU2 INR", "ACODEC LORN",
+				"7J4-14 LEFT", "AU2 OUTL",
+				"7J4-11 RIGHT", "AU2 OUTR";
 		assigned-clocks = <&clkc CLKID_MPLL0>,
 				  <&clkc CLKID_MPLL1>,
 				  <&clkc CLKID_MPLL2>;
@@ -201,6 +215,10 @@ dai-link-1 {
 			codec-0 {
 				sound-dai = <&aiu AIU_HDMI CTRL_I2S>;
 			};
+
+			codec-1 {
+				sound-dai = <&aiu AIU_ACODEC CTRL_I2S>;
+			};
 		};
 
 		dai-link-2 {
@@ -210,9 +228,22 @@ codec-0 {
 				sound-dai = <&hdmi_tx>;
 			};
 		};
+
+		dai-link-3 {
+			sound-dai = <&aiu AIU_ACODEC CTRL_OUT>;
+
+			codec-0 {
+				sound-dai = <&acodec>;
+			};
+		};
 	};
 };
 
+&acodec {
+	AVDD-supply = <&vddio_ao18>;
+	status = "okay";
+};
+
 &aiu {
 	status = "okay";
 };