arm64: dts: renesas: sparrow-hawk: Add MSIOF Sound support

Sparrow Hawk has Headset (CONN3) AUX_IN (CONN4) for Sound input/output
which is using MSIOF. Support it.

Signed-off-by: Kuninori Morimoto <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/[email protected]
Link: https://lore.kernel.org/[email protected]
Signed-off-by: Geert Uytterhoeven <[email protected]>

Author: morimoto

arch/arm64/boot/dts/renesas/r8a779g3-sparrow-hawk.dts

@@ -4,6 +4,37 @@
  *
  * Copyright (C) 2025 Marek Vasut <[email protected]>
  */
+/*
+ * DA7212 Codec settings
+ *
+ * for Playback
+ *	> amixer set "Headphone" 40%
+ *	> amixer set "Headphone" on
+ *	> amixer set "Mixout Left DAC Left"  on
+ *	> amixer set "Mixout Right DAC Right" on
+ *	> aplay xxx.wav
+ *
+ * for Capture (Aux/Mic)
+ *
+ *		on/off (B)
+ *	CONN3 (HeadSet) ---+----> MSIOF1
+ *			   |
+ *	CONN4 AUX ---------+ on/off (A)
+ *
+ *	> amixer set "Mixin PGA" on
+ *	> amixer set "Mixin PGA" 50%
+ *	> amixer set "ADC" on
+ *	> amixer set "ADC" 80%
+ *	> amixer set "Aux" on				^
+ *	> amixer set "Aux" 80%				| (A)
+ *	> amixer set "Mixin Left Aux Left" on		|
+ *	> amixer set "Mixin Right Aux Right" on		v
+ *	> amixer set "Mic 1" on				^
+ *	> amixer set "Mic 1" 80%			| (B)
+ *	> amixer set "Mixin Left Mic 1" on		|
+ *	> amixer set "Mixin Right Mic 1" on		v
+ *	> arecord -f cd xxx.wav
+ */
 
 /dts-v1/;
 #include <dt-bindings/gpio/gpio.h>
@@ -133,6 +164,12 @@
 		clock-frequency = <38400000>;
 	};
 
+	/* Page 30 / Audio_Codec */
+	sound_card: sound {
+		compatible = "audio-graph-card2";
+		links = <&msiof1_snd>;
+	};
+
 	/* Page 17 uSD-Slot */
 	vcc_sdhi: regulator-vcc-sdhi {
 		compatible = "regulator-gpio";
@@ -145,6 +182,10 @@
 	};
 };
 
+&audio_clkin {
+	clock-frequency = <24576000>;
+};
+
 /* Page 22 / Ether_AVB0 */
 &avb0 {
 	pinctrl-0 = <&avb0_pins>;
@@ -334,6 +375,29 @@
 			reg = <1>;
 			#address-cells = <1>;
 			#size-cells = <0>;
+
+			/* Page 30 / Audio_Codec */
+			codec@1a {
+				compatible = "dlg,da7212";
+
+				#sound-dai-cells = <0>;
+				reg = <0x1a>;
+
+				clocks = <&rcar_sound>;
+				clock-names = "mclk";
+
+				VDDA-supply   = <&reg_1p8v>;
+				VDDMIC-supply = <&reg_3p3v>;
+				VDDIO-supply  = <&reg_3p3v>;
+
+				port {
+					da7212_endpoint: endpoint {
+						bitclock-master;
+						frame-master;
+						remote-endpoint = <&msiof1_snd_endpoint>;
+					};
+				};
+			};
 		};
 
 		i2c0_mux2: i2c@2 {
@@ -404,6 +468,23 @@
 	status = "okay";
 };
 
+&msiof1 {
+	pinctrl-0 = <&msiof1_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+
+	/* ignore DT warning */
+	/delete-property/#address-cells;
+	/delete-property/#size-cells;
+
+	msiof1_snd: port {
+		msiof1_snd_endpoint: endpoint {
+			remote-endpoint = <&da7212_endpoint>;
+		};
+	};
+};
+
 /* Page 26 / 2230 Key M M.2 */
 &pcie0_clkref {
 	clock-frequency = <100000000>;
@@ -584,6 +665,31 @@
 		function = "mmc";
 		power-source = <1800>;
 	};
+
+	/* Page 30 / Audio_Codec */
+	msiof1_pins: sound {
+		groups = "msiof1_clk", "msiof1_sync", "msiof1_txd", "msiof1_rxd";
+		function = "msiof1";
+	};
+
+	/* Page 30 / Audio_Codec */
+	sound_clk_pins: sound-clk {
+		groups = "audio_clkin", "audio_clkout";
+		function = "audio_clk";
+	};
+};
+
+/* Page 30 / Audio_Codec */
+&rcar_sound {
+	pinctrl-0 = <&sound_clk_pins>;
+	pinctrl-names = "default";
+
+	/* It is used for ADG output as DA7212_MCLK */
+
+	/* audio_clkout */
+	clock-frequency = <12288000>; /* 48 kHz groups */
+
+	status = "okay";
 };
 
 /* Page 31 / FAN */