arch/arm64/boot/dts/renesas/ulcb-simple-audio-card.dtsi

// SPDX-License-Identifier: GPL-2.0
/*
 * Device Tree for ULCB + Simple Audio Card
 *
 * Copyright (C) 2022 Renesas Electronics Corp.
 */

/*
 *	(A) CPU0 <----> ak4613
 *	(B) CPU1  ----> HDMI
 *
 *	(A) aplay   -D plughw:0,0 xxx.wav
 *	(B) aplay   -D plughw:0,1 xxx.wav
 *
 *	(A) arecord -D plughw:0,0 xxx.wav
 */

/ {
	sound_card: sound {
		compatible = "simple-audio-card";
		label = "snd-ulcb";

		#address-cells = <1>;
		#size-cells = <0>;

		/*
		 * (A) CPU0 <-> ak4613
		 */
		simple-audio-card,dai-link@0 {
			reg = <0>;
			cpu {
				bitclock-master;
				frame-master;
				sound-dai = <&rcar_sound 0>;
			};
			codec {
				sound-dai = <&ak4613>;
			};
		};
		/*
		 * (B) CPU1 -> HDMI
		 */
		simple-audio-card,dai-link@1 {
			reg = <1>;
			cpu {
				bitclock-master;
				frame-master;
				sound-dai = <&rcar_sound 1>;
			};
			codec {
				sound-dai = <&hdmi0>;
			};
		};
	};
};

&ak4613 {
	/*
	 * (A) CPU0 <-> ak4613
	 */
	#sound-dai-cells = <0>;
};

&hdmi0 {
	/*
	 * (B) CPU1 -> HDMI
	 */
	#sound-dai-cells = <0>;
};

&rcar_sound {
	#address-cells = <1>;
	#size-cells = <0>;
	#sound-dai-cells = <1>;

	rcar_sound,dai@0 {
		reg = <0>;

		/*
		 * (A) CPU0 <-> ak4613
		 */
		dai0 {
			playback = <&ssi0 &src0 &dvc0>;
			capture  = <&ssi1 &src1 &dvc1>;
		};
		/*
		 * (B) CPU1 -> HDMI
		 */
		dai1 {
			playback = <&ssi2>;
		};
	};
};