devices/steamdeck: Create workarounds

This, for now, handles saving the ALS data for use by steam.

modules/devices/steamdeck/default.nix

@@ -23,6 +23,7 @@ in
     ./perf-control.nix
     ./sdgyrodsu.nix
     ./sound.nix
+    ./workarounds.nix
   ];
 
   options = {

modules/devices/steamdeck/workarounds.nix

@@ -0,0 +1,48 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib)
+    mkIf
+    mkMerge
+    mkOption
+    types
+  ;
+
+  cfg = config.jovian.devices.steamdeck;
+in
+{
+  options = {
+    jovian.devices.steamdeck = {
+      enableDeviceDataWorkarounds = mkOption {
+        type = types.bool;
+        default = cfg.enable;
+        defaultText = lib.literalExpression "config.jovian.devices.steamdeck.enable";
+        description = ''
+          Whether to add some workarounds for (Steam Deck) device-specific data.
+        '';
+        # Don't expose to users.
+        internal = true;
+        readOnly = true;
+      };
+    };
+  };
+  config = mkIf (cfg.enableDeviceDataWorkarounds) (mkMerge [
+    {
+      systemd.services."jovian-dmidecode-workaround" = {
+        enable = true;
+        unitConfig.ConditionPathIsDirectory = "/run";
+        before = [ "multi-user.target" ];
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          Type = "oneshot";
+          RemainAfterExit = true;
+        };
+        script = ''
+          #!${pkgs.runtimeShell}
+          mkdir -p /run/jovian
+          ${pkgs.dmidecode}/bin/dmidecode -t 11 > /run/jovian/dmidecode-11.txt
+        '';
+      };
+    }
+  ]);
+}