142 lines
4.3 KiB
Nix
142 lines
4.3 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.thinkfan;
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configFile = pkgs.writeText "thinkfan.conf" ''
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# ATTENTION: There is only very basic sanity checking on the configuration.
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# That means you can set your temperature limits as insane as you like. You
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# can do anything stupid, e.g. turn off your fan when your CPU reaches 70°C.
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#
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# That's why this program is called THINKfan: You gotta think for yourself.
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#
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######################################################################
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#
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# IBM/Lenovo Thinkpads (thinkpad_acpi, /proc/acpi/ibm)
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# ====================================================
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#
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# IMPORTANT:
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#
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# To keep your HD from overheating, you have to specify a correction value for
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# the sensor that has the HD's temperature. You need to do this because
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# thinkfan uses only the highest temperature it can find in the system, and
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# that'll most likely never be your HD, as most HDs are already out of spec
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# when they reach 55 °C.
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# Correction values are applied from left to right in the same order as the
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# temperatures are read from the file.
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#
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# For example:
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# tp_thermal /proc/acpi/ibm/thermal (0, 0, 10)
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# will add a fixed value of 10 °C the 3rd value read from that file. Check out
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# http://www.thinkwiki.org/wiki/Thermal_Sensors to find out how much you may
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# want to add to certain temperatures.
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${cfg.fan}
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${cfg.sensors}
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# Syntax:
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# (LEVEL, LOW, HIGH)
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# LEVEL is the fan level to use (0-7 with thinkpad_acpi)
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# LOW is the temperature at which to step down to the previous level
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# HIGH is the temperature at which to step up to the next level
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# All numbers are integers.
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#
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${cfg.levels}
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'';
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in {
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options = {
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services.thinkfan = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable thinkfan, fan controller for IBM/Lenovo ThinkPads.
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'';
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};
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sensors = mkOption {
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type = types.lines;
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default = ''
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tp_thermal /proc/acpi/ibm/thermal (0,0,10)
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'';
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description =''
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thinkfan can read temperatures from three possible sources:
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/proc/acpi/ibm/thermal
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Which is provided by the thinkpad_acpi kernel
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module (keyword tp_thermal)
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/sys/class/hwmon/*/temp*_input
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Which may be provided by any hwmon drivers (keyword
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hwmon)
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S.M.A.R.T. (since 0.9 and requires the USE_ATASMART compilation flag)
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Which reads the temperature directly from the hard
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disk using libatasmart (keyword atasmart)
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Multiple sensors may be added, in which case they will be
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numbered in their order of appearance.
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'';
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};
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fan = mkOption {
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type = types.str;
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default = "tp_fan /proc/acpi/ibm/fan";
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description =''
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Specifies the fan we want to use.
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On anything other than a Thinkpad you'll probably
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use some PWM control file in /sys/class/hwmon.
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A sysfs fan would be specified like this:
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pwm_fan /sys/class/hwmon/hwmon2/device/pwm1
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'';
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};
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levels = mkOption {
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type = types.lines;
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default = ''
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(0, 0, 55)
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(1, 48, 60)
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(2, 50, 61)
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(3, 52, 63)
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(6, 56, 65)
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(7, 60, 85)
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(127, 80, 32767)
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'';
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description = ''
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(LEVEL, LOW, HIGH)
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LEVEL is the fan level to use (0-7 with thinkpad_acpi).
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LOW is the temperature at which to step down to the previous level.
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HIGH is the temperature at which to step up to the next level.
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All numbers are integers.
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'';
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};
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkgs.thinkfan ];
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systemd.services.thinkfan = {
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description = "Thinkfan";
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after = [ "basic.target" ];
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wantedBy = [ "multi-user.target" ];
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path = [ pkgs.thinkfan ];
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serviceConfig.ExecStart = "${pkgs.thinkfan}/bin/thinkfan -n -c ${configFile}";
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};
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boot.extraModprobeConfig = "options thinkpad_acpi experimental=1 fan_control=1";
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};
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}
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