Brooklyn/arch/arm/boot/dts/overlays/applepi-dac-overlay.dts

/dts-v1/;
/plugin/;

/ {
    compatible = "brcm,bcm2835";

    fragment@0 {
        target = <&sound>;
        __overlay__ {
            compatible = "simple-audio-card";
            simple-audio-card,name = "ApplePi-DAC";

            status = "okay";

            playback_link: simple-audio-card,dai-link@1 {
                format = "i2s";

                p_cpu_dai: cpu {
                    sound-dai = <&i2s>;
                    dai-tdm-slot-num = <2>;
                    dai-tdm-slot-width = <32>;
                };

                p_codec_dai: codec {
                    sound-dai = <&codec_out>;
                };
            };
        };
    };

    fragment@1 {
        target-path = "/";
        __overlay__ {
            codec_out: pcm1794a-codec {
                #sound-dai-cells = <0>;
                compatible = "ti,pcm1794a";
                status = "okay";
            };
        };
    };

    fragment@2 {
        target = <&i2s>;
        __overlay__ {
            #sound-dai-cells = <0>;
            status = "okay";
        };
    };
};

/*
   Written by: Leonid Ayzenshtat
   Company: Orchard Audio (www.orchardaudio.com)

   compile with:
   dtc -@ -H epapr -O dtb -o ApplePi-DAC.dtbo -W no-unit_address_vs_reg ApplePi-DAC.dts
*/