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nixpkgs/nixos/modules/tasks/trackpoint.nix

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Nix

{ config, lib, pkgs, ... }:
with lib;
{
###### interface
options = {
hardware.trackpoint = {
enable = mkOption {
default = false;
type = types.bool;
description = ''
Enable sensitivity and speed configuration for trackpoints.
'';
};
sensitivity = mkOption {
default = 128;
example = 255;
type = types.int;
description = ''
Configure the trackpoint sensitivity. By default, the kernel
configures 128.
'';
};
speed = mkOption {
default = 97;
example = 255;
type = types.int;
description = ''
Configure the trackpoint sensitivity. By default, the kernel
configures 97.
'';
};
};
};
###### implementation
config = mkIf config.hardware.trackpoint.enable {
jobs.trackpoint =
{ description = "Initialize trackpoint";
startOn = "started udev";
task = true;
script = ''
echo -n ${toString config.hardware.trackpoint.sensitivity} \
> /sys/devices/platform/i8042/serio1/sensitivity
echo -n ${toString config.hardware.trackpoint.speed} \
> /sys/devices/platform/i8042/serio1/speed
'';
};
};
}