overlays: rt5616: Add RT5616 audio codec overlay

arch/arm/boot/dts/overlays/Makefile

@@ -264,6 +264,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	rpi-sense-v2.dtbo \
 	rpi-tv.dtbo \
 	rra-digidac1-wm8741-audio.dtbo \
+	rt5616.dtbo \
 	sainsmart18.dtbo \
 	sc16is750-i2c.dtbo \
 	sc16is752-i2c.dtbo \

arch/arm/boot/dts/overlays/README

@@ -4738,6 +4738,14 @@ Load:   dtoverlay=rra-digidac1-wm8741-audio
 Params: <None>
 
 
+Name:   rt5616
+Info:   Overlay for the Realtek RT5616 I2S audio codec (HAT with the RT5616
+        codec on I2C1 at 0x1b, MCLK 12.288 MHz, I2S connected to the I2S
+        consumer controller on GPIO 18-21).
+Load:   dtoverlay=rt5616,<param>=<val>
+Params: alsaname                Changes the card name in ALSA
+
+
 Name:   sainsmart18
 Info:   Overlay for the SPI-connected Sainsmart 1.8" display (based on the
         ST7735R chip).

arch/arm/boot/dts/overlays/rt5616-overlay.dts

@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Definitions for the Realtek RT5616 I2S audio codec
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&i2s_clk_consumer>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target-path = "/";
+		__overlay__ {
+			rt5616_mclk: rt5616-mclk {
+				compatible = "fixed-clock";
+				#clock-cells = <0>;
+				clock-frequency = <12288000>;
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&i2c1>;
+		__overlay__ {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "okay";
+
+			rt5616: rt5616@1b {
+				#sound-dai-cells = <0>;
+				compatible = "realtek,rt5616";
+				reg = <0x1b>;
+				clocks = <&rt5616_mclk>;
+				clock-names = "mclk";
+			};
+		};
+	};
+
+	fragment@3 {
+		target = <&sound>;
+		rt5616_card: __overlay__ {
+			compatible = "simple-audio-card";
+			simple-audio-card,format = "i2s";
+			simple-audio-card,name = "rt5616-codec";
+			simple-audio-card,mclk-fs = <256>;
+			status = "okay";
+
+			simple-audio-card,bitclock-master = <&sound_master>;
+			simple-audio-card,frame-master = <&sound_master>;
+
+			simple-audio-card,widgets =
+				"Microphone", "Mic Jack",
+				"Headphone", "Headphone Jack";
+			simple-audio-card,routing =
+				"IN1P", "Mic Jack",
+				"IN2P", "Mic Jack",
+				"Headphone Jack", "HPOL",
+				"Headphone Jack", "HPOR";
+
+			simple-audio-card,cpu {
+				sound-dai = <&i2s_clk_consumer>;
+			};
+
+			sound_master: simple-audio-card,codec {
+				sound-dai = <&rt5616>;
+			};
+		};
+	};
+
+	__overrides__ {
+		alsaname = <&rt5616_card>,"simple-audio-card,name";
+	};
+};