From b9d9083322add2026935898d5a372a3a2464e92e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Sat, 15 Apr 2017 14:36:10 +0200
Subject: [PATCH] powertop: add module

---
 nixos/modules/module-list.nix    |  1 +
 nixos/modules/tasks/powertop.nix | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 nixos/modules/tasks/powertop.nix

diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index f7608a57d71467..0cd02d259e4544 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -659,6 +659,7 @@
   ./tasks/scsi-link-power-management.nix
   ./tasks/swraid.nix
   ./tasks/trackpoint.nix
+  ./tasks/powertop.nix
   ./testing/service-runner.nix
   ./virtualisation/container-config.nix
   ./virtualisation/containers.nix
diff --git a/nixos/modules/tasks/powertop.nix b/nixos/modules/tasks/powertop.nix
new file mode 100644
index 00000000000000..6f57f5f5c25e92
--- /dev/null
+++ b/nixos/modules/tasks/powertop.nix
@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.powerManagment.powertop;
+in {
+  ###### interface
+
+  options.powerManagment.powertop.enable = mkEnableOption "powertop auto tuning on startup";
+
+  ###### implementation
+
+  config = mkIf (cfg.enable) {
+    systemd.services = {
+      powertop = {
+        wantedBy = [ "multi-user.target" ];
+        description = "Powertop tunings";
+        serviceConfig = {
+          Type = "oneshot";
+          RemainAfterExit = "yes";
+          ExecStart = "${pkgs.powertop}/bin/powertop --auto-tune";
+        };
+      };
+    };
+  };
+}