nixos-hardware/hardkernel/odroid-hc4/default.nix

{ config, lib, ... }:

{
  # Based on the config from https://www.armbian.com/odroid-hc4/
  hardware.fancontrol = {
    enable = lib.mkDefault true;
    config = let
      # According to https://www.armbian.com/odroid-hc4/ the FCFANS line should be removed on kernel 5.15.
      kernelVersion = config.boot.kernelPackages.kernel.version;
      needFcFans = lib.versions.majorMinor kernelVersion != "5.15";
    in lib.mkDefault (''
      INTERVAL=10
      DEVPATH=hwmon0=devices/virtual/thermal/thermal_zone0 hwmon2=devices/platform/pwm-fan
      DEVNAME=hwmon0=cpu_thermal hwmon2=pwmfan
      FCTEMPS=hwmon2/pwm1=hwmon0/temp1_input
    '' + lib.optionalString needFcFans ''
      FCFANS= hwmon2/pwm1=hwmon2/fan1_input
    '' + ''
      MINTEMP=hwmon2/pwm1=50
      MAXTEMP=hwmon2/pwm1=60
      MINSTART=hwmon2/pwm1=20
      MINSTOP=hwmon2/pwm1=28
      MINPWM=hwmon2/pwm1=0
      MAXPWM=hwmon2/pwm1=255
    '');
  };

  # Linux 5.15 sometimes crash under heavy network usage
  systemd.watchdog.runtimeTime = lib.mkDefault "1min";

  hardware.deviceTree.filter = "meson-sm1-odroid-hc4.dtb";
}