arm64: dts: renesas: r8a77995: draak: Add R-Car Sound support

This patch adds R-Car Sound support for D3 draak.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87czrdx3z5.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a77995-draak.dts

@@ -20,6 +20,16 @@
 		ethernet0 = &avb;
 	};
 
+	audio_clkout: audio-clkout {
+		/*
+		 * This is same as <&rcar_sound 0>
+		 * but needed to avoid cs2000/rcar_sound probe dead-lock
+		 */
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <12288000>;
+	};
+
 	backlight: backlight {
 		compatible = "pwm-backlight";
 		pwms = <&pwm1 0 50000>;
@@ -161,6 +171,14 @@
 		regulator-always-on;
 	};
 
+	sound_card: sound {
+		compatible = "audio-graph-card";
+
+		dais = <&rsnd_port0	/* ak4613 */
+			/* HDMI is not yet supported */
+		>;
+	};
+
 	vga {
 		compatible = "vga-connector";
 
@@ -198,6 +216,25 @@
 		#clock-cells = <0>;
 		clock-frequency = <74250000>;
 	};
+
+	x19_clk: x19 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24576000>;
+	};
+};
+
+&audio_clk_b {
+	/*
+	 * X11 is connected to VI4_FIELD/SCIF_CLK/AUDIO_CLKB,
+	 * and R-Car Sound uses AUDIO_CLKB.
+	 * Note is that schematic indicates VI4_FIELD conection only
+	 * not AUDIO_CLKB at SoC page.
+	 * And this VI4_FIELD/SCIF_CLK/AUDIO_CLKB is connected to SW60.
+	 * SW60 should be 1-2.
+	 */
+
+	clock-frequency = <22579200>;
 };
 
 &avb {
@@ -273,6 +310,28 @@
 	pinctrl-names = "default";
 	status = "okay";
 
+	ak4613: codec@10 {
+		compatible = "asahi-kasei,ak4613";
+		#sound-dai-cells = <0>;
+		reg = <0x10>;
+		clocks = <&rcar_sound 0>; /* audio_clkout */
+
+		asahi-kasei,in1-single-end;
+		asahi-kasei,in2-single-end;
+		asahi-kasei,out1-single-end;
+		asahi-kasei,out2-single-end;
+		asahi-kasei,out3-single-end;
+		asahi-kasei,out4-single-end;
+		asahi-kasei,out5-single-end;
+		asahi-kasei,out6-single-end;
+
+		port {
+			ak4613_endpoint: endpoint {
+				remote-endpoint = <&rsnd_for_ak4613>;
+			};
+		};
+	};
+
 	composite-in@20 {
 		compatible = "adi,adv7180cp";
 		reg = <0x20>;
@@ -375,6 +434,17 @@
 		};
 	};
 
+	cs2000: clk-multiplier@4f {
+		#clock-cells = <0>;
+		compatible = "cirrus,cs2000-cp";
+		reg = <0x4f>;
+		clocks = <&audio_clkout>, <&x19_clk>; /* audio_clkout_1, x19 */
+		clock-names = "clk_in", "ref_clk";
+
+		assigned-clocks = <&cs2000>;
+		assigned-clock-rates = <24576000>; /* 1/1 divide */
+	};
+
 	eeprom@50 {
 		compatible = "rohm,br24t01", "atmel,24c01";
 		reg = <0x50>;
@@ -487,6 +557,17 @@
 		power-source = <1800>;
 	};
 
+	sound_pins: sound {
+		groups = "ssi34_ctrl", "ssi3_data", "ssi4_data_a";
+		function = "ssi";
+	};
+
+	sound_clk_pins: sound-clk {
+		groups = "audio_clk_a", "audio_clk_b",
+			 "audio_clkout", "audio_clkout1";
+		function = "audio_clk";
+	};
+
 	usb0_pins: usb0 {
 		groups = "usb0";
 		function = "usb0";
@@ -512,6 +593,42 @@
 	status = "okay";
 };
 
+&rcar_sound {
+	pinctrl-0 = <&sound_pins>, <&sound_clk_pins>;
+	pinctrl-names = "default";
+
+	/* Single DAI */
+	#sound-dai-cells = <0>;
+
+	/* audio_clkout0/1 */
+	#clock-cells = <1>;
+	clock-frequency = <12288000 11289600>;
+
+	status = "okay";
+
+	clocks = <&cpg CPG_MOD 1005>,
+		 <&cpg CPG_MOD 1011>, <&cpg CPG_MOD 1012>,
+		 <&cpg CPG_MOD 1025>, <&cpg CPG_MOD 1026>,
+		 <&cpg CPG_MOD 1020>, <&cpg CPG_MOD 1021>,
+		 <&cpg CPG_MOD 1020>, <&cpg CPG_MOD 1021>,
+		 <&cpg CPG_MOD 1019>, <&cpg CPG_MOD 1018>,
+		 <&cs2000>, <&audio_clk_b>,
+		 <&cpg CPG_CORE R8A77995_CLK_ZA2>;
+
+	ports {
+		rsnd_port0: port {
+			rsnd_for_ak4613: endpoint {
+				remote-endpoint = <&ak4613_endpoint>;
+				dai-format = "left_j";
+				bitclock-master = <&rsnd_for_ak4613>;
+				frame-master = <&rsnd_for_ak4613>;
+				playback = <&ssi3>, <&src5>, <&dvc0>;
+				capture  = <&ssi4>, <&src6>, <&dvc1>;
+			};
+		};
+	};
+};
+
 &rwdt {
 	timeout-sec = <60>;
 	status = "okay";
@@ -540,6 +657,10 @@
 	status = "okay";
 };
 
+&ssi4 {
+	shared-pin;
+};
+
 &usb2_phy0 {
 	pinctrl-0 = <&usb0_pins>;
 	pinctrl-names = "default";