l hw x220: stop charging at 90%

lass/2configs/hw/x220.nix

@@ -1,4 +1,4 @@
-{ ... }:
+{ config, pkgs, ... }:
 {
   imports = [
     <stockholm/krebs/2configs/hw/x220.nix>
@@ -8,7 +8,20 @@
     initrd.luks.devices = [ { name = "luksroot"; device = "/dev/sda3"; } ];
     initrd.luks.cryptoModules = [ "aes" "sha512" "sha1" "xts" ];
     initrd.availableKernelModules = [ "xhci_hcd" "ehci_pci" "ahci" "usb_storage" ];
+    extraModulePackages = [
+      config.boot.kernelPackages.tp_smapi
+      config.boot.kernelPackages.acpi_call
+    ];
+    kernelModules = [
+      "acpi_call"
+      "tp_smapi"
+    ];
   };
+
+  environment.systemPackages = [
+    pkgs.tpacpi-bat
+  ];
+
   fileSystems = {
     "/" = {
       device = "/dev/mapper/pool-root";
@@ -33,4 +46,10 @@
   services.logind.lidSwitch = "ignore";
   services.logind.lidSwitchDocked = "ignore";
 
+  services.tlp.enable = true;
+  services.tlp.extraConfig = ''
+    START_CHARGE_THRESH_BAT0=80
+    STOP_CHARGE_THRESH_BAT0=95
+  '';
+
 }