Add steam deck host

hosts/nixos/deck/disk-config.nix

@@ -0,0 +1,34 @@
+{
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        device = "/dev/nvme0n1";
+        content = {
+          type = "gpt";
+          partitions = {
+            ESP = {
+              size = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "fmask=0077" "dmask=0077" ];
+              };
+            };
+
+            root = {
+              size = "100%";
+              content = {
+                type = "filesystem";
+                format = "ext4";
+                mountpoint = "/";
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}

hosts/nixos/deck/hardware-configuration.nix

@@ -0,0 +1,14 @@
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports = [
+    (modulesPath + "/installer/scan/not-detected.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [ "nvme" "xhci_pci" "usbhid" "usb_storage" "sd_mod" "sdhci_pci" ];
+  boot.kernelModules = [ "kvm-amd" ];
+
+  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/nixos/deck/home.nix

@@ -0,0 +1,7 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    ../home-default.nix
+  ];
+}

hosts/nixos/deck/system.nix

@@ -0,0 +1,44 @@
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [
+    ./hardware-configuration.nix
+    ../system-default.nix
+  ];
+
+  boot.loader = {
+    systemd-boot.enable = true;
+    systemd-boot.configurationLimit = 10;
+    efi.canTouchEfiVariables = true;
+    timeout = 3;
+  };
+
+  jovian.devices.steamdeck.enable = true;
+
+  jovian.steam = {
+    enable = true;
+    autoStart = true;
+    user = "yanlin";
+  };
+
+  jovian.steamos.useSteamOSConfig = true;
+
+  jovian.hardware.has.amd.gpu = true;
+
+  hardware.enableRedistributableFirmware = true;
+
+  networking = {
+    hostName = "deck";
+    networkmanager.enable = true;
+    firewall.enable = false;
+  };
+
+  users.users.yanlin = {
+    extraGroups = [ "networkmanager" "wheel" "video" "audio" "input" ];
+  };
+
+  environment.systemPackages = with pkgs; [
+    pciutils
+    usbutils
+  ];
+}