i2c.nix

{ config, lib, pkgs, ... }:

let cfg = config.hardware.raspberry-pi."4".i2c-bcm2708;
in {
    options.hardware = {
        raspberry-pi."4".i2c-bcm2708 = {
            enable = lib.mkEnableOption ''
                Enable the Raspberry Pi 4 hardware i2c controller.
                '';
        };
    };

    config = lib.mkIf cfg.enable {
        hardware.deviceTree = {
            overlays = [
            {
                name = "i2c0";
                dtsText = ''

	            /dts-v1/;
                /plugin/;

                /{
                    compatible = "raspberrypi,4-model-b";

                    fragment@1 {
                        target = <&i2c1>;
                        __overlay__ {
                            status = "okay";
                        };
                    };
                };
                '';
            }
            ];
        };
    };
}