quirks/wifi: Add quirk to disable MAC address randomization

modules/quirks/default.nix

@@ -3,5 +3,6 @@
     ./exynos
     ./qualcomm
     ./framebuffer.nix
+    ./wifi.nix
   ];
 }

modules/quirks/wifi.nix

@@ -0,0 +1,36 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkOption types mkMerge mkIf;
+  cfg = config.mobile.quirks;
+in
+{
+  options.mobile.quirks.wifi = {
+    disableMacAddressRandomization = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Disables MAC address randomization.
+
+        This may be required by some hardware or drivers, or combination.
+        When the feature is enabled (quirk disabled) it may cause the wifi
+        interface to disappear when enabled, as long as Network Manager is
+        active.
+      '';
+    };
+  };
+
+  config = mkIf cfg.wifi.disableMacAddressRandomization {
+    environment.etc."NetworkManager/conf.d/30-mac-randomization.conf" = {
+      source = pkgs.writeText "30-mac-randomization.conf" ''
+        [device-mac-randomization]
+        wifi.scan-rand-mac-address=no
+
+        [connection-mac-randomization]
+        ethernet.cloned-mac-address=preserve
+        wifi.cloned-mac-address=preserve
+      '';
+      target = "NetworkManager/conf.d/30-mac-randomization.conf";
+    };
+  };
+}