audiocard-overlay.dts

// Definitions for AudioCard
/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2708";

	fragment@0 {
		target = <&sound>;
		__overlay__ {
			compatible = "audiocard,audiocard";
			i2s-controller = <&i2s>;
			status = "okay";
		};
	};

	fragment@1 {
		target = <&i2s>;
		__overlay__ {
			status = "okay";
		};
	};
    
    fragment@2 {
        target = <&gpio>;
        __overlay__ {
            audiocard_pins: audiocard_pins {
                brcm,pins = <26>; /* Pin 26 */
                brcm,function = <1>; /* Output */
            };
        };
    };

	fragment@3 {
		target = <&spi0>;
		__overlay__ {
			/* needed to avoid dtc warning */
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			ad913x: ad193x@0{
				compatible = "analog,ad1938";
				reg = <0>;
				status = "okay";

				pinctrl-names = "default";
				pinctrl-0 = <&audiocard_pins>;
				/* spi-max-frequency = <32000000>; */
				spi-max-frequency = <10000000>; /* ok with 500000 */
			};

		};
	};
    __overrides__ {
        /*gpiopin = <&ad913x>,"reset-gpio:4",*/
                 /* <&audiocard_pins>,"brcm,pins:0";*/
    };
};