infrastructure/config/profiles/hardware/raspi.nix

{ config, lib, pkgs, ... }: with lib; {
  deploy.profile.hardware.raspi = true;

  nixpkgs.crossOverlays = [
    (import ../../../overlays/pi)
  ];

  boot = {
    loader = {
      grub.enable = false;
      generic-extlinux-compatible.enable = true;
    };
    consoleLogLevel = lib.mkDefault 7;
    kernelPackages = pkgs.linuxPackages_rpi1;
    kernelModules = mkForce [ "loop" "atkbd" ];
    initrd = {
      includeDefaultModules = false;
      availableKernelModules = mkForce [
        "mmc_block"
        "usbhid"
        "ext4"
        "hid_generic"
        "hid_lenovo"
        "hid_apple"
        "hid_roccat"
        "hid_logitech_hidpp"
        "hid_logitech_dj"
        "hid_microsoft"
      ];
    };
  };

  services.udev.extraRules = ''
    SUBSYSTEM=="bcm2835-gpiomem", KERNEL=="gpiomem", GROUP="gpio", MODE="0660"
    SUBSYSTEM=="gpio", KERNEL=="gpiochip*", ACTION=="add", PROGRAM="${pkgs.runtimeShell} -c 'chown root:gpio /sys/class/gpio/export /sys/class/gpio/unexport ; chmod 220 /sys/class/gpio/export /sys/class/gpio/unexport'"
    SUBSYSTEM=="gpio", KERNEL=="gpio*", ACTION=="add", PROGRAM="${pkgs.runtimeShell} -c 'chown root:gpio /sys%p/active_low /sys%p/direction /sys%p/edge /sys%p/value ; chmod 660 /sys%p/active_low /sys%p/direction /sys%p/edge /sys%p/value'"

T
  '';

  users.groups.gpio = {};

  environment.noXlibs = true;
  documentation.info.enable = false;
  documentation.man.enable = false;
  programs.command-not-found.enable = false;
  security.polkit.enable = false;
  security.audit.enable = false;
  services.udisks2.enable = false;
  boot.enableContainers = false;

  nixpkgs.crossSystem = systems.examples.raspberryPi // {
    system = "armv6l-linux";
  };

  fileSystems = {
    "/" = {
      device = "/dev/disk/by-label/NIXOS_SD";
      fsType = "ext4";
    };
  };
}