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

Add the internal DAC support on the libretech CC. The output of this
DAC is provided on the 9J5 connector.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200506221656.477379-5-jbrunet@baylibre.com

arch/arm64/boot/dts/amlogic/meson-gxl-s805x-libretech-ac.dts

@@ -98,6 +98,15 @@ vcc_3v3: regulator-vcc_3v3 {
 		regulator-always-on;
 	};
 
+	vddio_ao18: regulator-vddio_ao18 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_AO18";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vcc_3v3>;
+		regulator-always-on;
+	};
+
 	vddio_boot: regulator-vddio_boot {
 		compatible = "regulator-fixed";
 		regulator-name = "VDDIO_BOOT";
@@ -110,6 +119,10 @@ vddio_boot: regulator-vddio_boot {
 	sound {
 		compatible = "amlogic,gx-sound-card";
 		model = "GXL-LIBRETECH-S805X-AC";
+		audio-widgets = "Speaker", "9J5-3 LEFT",
+				"Speaker", "9J5-2 RIGHT";
+		audio-routing = "9J5-3 LEFT", "ACODEC LOLN",
+				"9J5-2 RIGHT", "ACODEC LORN";
 		assigned-clocks = <&clkc CLKID_MPLL0>,
 				  <&clkc CLKID_MPLL1>,
 				  <&clkc CLKID_MPLL2>;
@@ -131,6 +144,10 @@ dai-link-1 {
 			codec-0 {
 				sound-dai = <&aiu AIU_HDMI CTRL_I2S>;
 			};
+
+			codec-1 {
+				sound-dai = <&aiu AIU_ACODEC CTRL_I2S>;
+			};
 		};
 
 		dai-link-2 {
@@ -140,7 +157,20 @@ 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 {