# kernel module derivation.
# use via: `config.boot.kernelPackages.callPackage ./package.nix { }`
{
  lib,
  stdenv,
  kernel,
}:

stdenv.mkDerivation {
  pname = "mhs35";
  version = "1.0";

  src = lib.fileset.toSource {
    root = ./.;
    fileset = lib.fileset.unions [
      ./mhs35.c
      ./Kbuild
    ];
  };

  hardeningDisable = [ "pic" ];
  nativeBuildInputs = kernel.moduleBuildDependencies;

  makeFlags = [
    "-C"
    "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
    "M=$(PWD)"
    "modules"
  ];

  installPhase = ''
    install -D mhs35.ko \
      $out/lib/modules/${kernel.modDirVersion}/extra/mhs35.ko
  '';

  meta = {
    description = "DRM driver for goodtft MHS-3.5 panels";
    license = lib.licenses.gpl2Plus;
    platforms = [ "aarch64-linux" ];
  };
}