// Mikroelektronika DAC Click in Pi Click 2, Pi Click 3 or Pi Click 4 Shield
// Socket 2

/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2835";

	// Create a fictitious voltage regulator for Vref aka 3v3

	fragment@0 {
		target-path = "/";
		__overlay__ {
			Mikrobus3v3: Mikrobus3v3 {
				compatible = "regulator-fixed";
				regulator-name = "Mikrobus3v3";
				regulator-min-microvolt = <3300000>;
				regulator-max-microvolt = <3300000>;
				regulator-always-on;
				status = "okay";
 			};
		};
	};

	// Enable MCP3204 on SPI chip 0 slave select 1 (GPIO7)

	fragment@2 {
		target = <&spi0>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			mcp4921_01: mcp4921@1 {
				compatible = "mcp4921";
				reg = <1>;
				spi-max-frequency = <1000000>;
				vref-supply = <&Mikrobus3v3>;
			};
		};
	};

	// Define parameters to calibrate the reference voltage

	__overrides__ {
		min = <&Mikrobus3v3>, "regulator-min-microvolt:0";
		max = <&Mikrobus3v3>, "regulator-max-microvolt:0";
	};
};