sway: suspend powerplay mousepad led in sync with mouse

user/sway/default.nix

@@ -23,6 +23,7 @@ in
     ./swayidle.nix
     ./swaylock.nix
     ./theme.nix
+    ./powerplay-led-idle.nix
   ];
   config = lib.mkIf (config.my.desktop == "sway") {
     services.mako.enable = true;

user/sway/powerplay-led-idle.nix

@@ -0,0 +1,17 @@
+{ pkgs, lib, ... }:
+{
+  systemd.user.services.powerplay-led-idle = {
+    Unit = {
+      Description = "Autosuspend Powerplay mousepad led";
+      PartOf = [ "graphical-session.target" ];
+      After = [ "graphical-session.target" ];
+    };
+    Service = {
+      ExecStart = lib.getExe pkgs.powerplay-led-idle;
+      Restart = "on-failure";
+    };
+    Install = {
+      WantedBy = [ "sway-session.target" ];
+    };
+  };
+}