arm64: dts: rockchip: Add analog audio output on quartz64-b

This adds the necessary device tree changes to enable analog
audio output on the PINE64 Quartz64 Model B with its RK809
codec.

The headphone detection pin is left out for now because I couldn't
get it to work and am not sure if it even matters, but for future
reference: It's pin GPIO4 RK_PC4, named HP_DET_L_GPIO4_C4 in the
schematic.
Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@gmail.com>
Link: https://lore.kernel.org/r/20220721083301.3711-1-frattaroli.nicolas@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3566-quartz64-b.dts

@@ -42,6 +42,21 @@ led-user {
 		};
 	};
 
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,format = "i2s";
+		simple-audio-card,name = "Analog RK809";
+		simple-audio-card,mclk-fs = <256>;
+
+		simple-audio-card,cpu {
+			sound-dai = <&i2s1_8ch>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&rk809>;
+		};
+	};
+
 	sdio_pwrseq: sdio-pwrseq {
 		status = "okay";
 		compatible = "mmc-pwrseq-simple";
@@ -177,11 +192,16 @@ rk809: pmic@20 {
 		reg = <0x20>;
 		interrupt-parent = <&gpio0>;
 		interrupts = <RK_PA7 IRQ_TYPE_LEVEL_LOW>;
+		assigned-clocks = <&cru I2S1_MCLKOUT_TX>;
+		assigned-clock-parents = <&cru CLK_I2S1_8CH_TX>;
+		clock-names = "mclk";
+		clocks = <&cru I2S1_MCLKOUT_TX>;
 		clock-output-names = "rk808-clkout1", "rk808-clkout2";
 
 		pinctrl-names = "default";
-		pinctrl-0 = <&pmic_int>;
+		pinctrl-0 = <&pmic_int>, <&i2s1m0_mclk>;
 		rockchip,system-power-controller;
+		#sound-dai-cells = <0>;
 		wakeup-source;
 		#clock-cells = <1>;
 
@@ -420,6 +440,16 @@ &i2c5 {
 	status = "disabled";
 };
 
+&i2s1_8ch {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2s1m0_sclktx
+		     &i2s1m0_lrcktx
+		     &i2s1m0_sdi0
+		     &i2s1m0_sdo0>;
+	rockchip,trcm-sync-tx-only;
+	status = "okay";
+};
+
 &mdio1 {
 	rgmii_phy1: ethernet-phy@1 {
 		compatible = "ethernet-phy-ieee802.3-c22";