[NixOS] Add Raspberry Pi 4b Configuration

nixos/machines/biskcomp.nix

@@ -0,0 +1,7 @@
+{
+  imports = [
+    ../raspberry-pi.nix
+  ];
+
+  networking.hostName = "biskcomp";
+}

nixos/raspberry-pi.nix

@@ -0,0 +1,126 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    <nixos-hardware/raspberry-pi/4>
+  ];
+
+  nixpkgs.overlays = [
+    (import ./overlays.nix)
+  ];
+
+  hardware.raspberry-pi."4".fkms-3d.enable = true;
+
+  nixpkgs.config.allowUnfree = true;
+  nixpkgs.config.android_sdk.accept_license = true;
+  nixpkgs.config.permittedInsecurePackages = [
+    "openssl-1.0.2u"
+  ];
+
+  boot = {
+    kernelPackages = pkgs.linuxPackages_rpi4;
+    tmpOnTmpfs = true;
+    loader = {
+      grub.enable = false;
+      generic-extlinux-compatible.enable = true;
+      raspberryPi = {
+        enable = true;
+	      version = 4;
+	      firmwareConfig = ''
+          dtparam=audio=on
+          hdmi_drive=2
+	      '';
+      };
+    };
+  };
+
+  hardware.bluetooth.enable = true;
+  services.blueman.enable = true;
+
+  hardware.enableRedistributableFirmware = true;
+
+  networking = {
+    networkmanager.enable = true;
+  };
+
+  # networking.hostName = "nixos"; # Define your hostname.
+
+  networking.useDHCP = false;
+  networking.interfaces.eth0.useDHCP = true;
+  networking.interfaces.wlan0.useDHCP = true;
+
+
+  # Enable the X11 windowing system.
+  services.xserver = {
+    exportConfiguration = true;
+    layout = "us";
+    enable = true;
+    desktopManager = {
+      plasma5.enable = true;
+    };
+    displayManager.lightdm.enable = true;
+  };
+
+  powerManagement.cpuFreqGovernor = "ondemand";
+
+  fileSystems."/" = {
+    device = "/dev/disk/by-label/NIXOS_SD";
+    fsType = "ext4";
+    options = [ "noatime" ];
+  };
+
+  hardware.video.hidpi.enable = true;
+
+  sound.enable = true;
+  hardware.pulseaudio.enable = true;
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.imalison = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
+  };
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+    emacs
+    firefox
+    raspberrypi-eeprom
+    transmission-gtk
+    vlc
+    yubikey-manager
+    networkmanagerapplet
+    ncdu
+    jq
+    rcm
+    ic-keysmith
+  ];
+
+  services.openssh.enable = true;
+
+  services.avahi = {
+    enable = true;
+    nssmdns = true;
+    publish = {
+      enable = true;
+      domain = true;
+      userServices = true;
+    };
+  };
+
+  programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
+  services.pcscd.enable = true;
+  security.sudo.wheelNeedsPassword = false;
+
+  nix = {
+    autoOptimiseStore = true;
+    gc = {
+      automatic = true;
+      dates = "weekly";
+      options = "--delete-older-than 30d";
+    };
+  };
+
+  system.stateVersion = "21.05"; # Did you read the comment?
+  nix.trustedUsers = ["imalison" "kat"];
+}