From 77e77900cef89e411e6caff7c9b6e06937e7d642 Mon Sep 17 00:00:00 2001
From: m1dugh <romain.le-miere@epita.fr>
Date: Thu, 19 Sep 2024 19:03:13 +0200
Subject: [PATCH] msi-ec-kmods: init at 0-unstable-2024-09-19

Adds msi-ec-kmods kernel module for msi embedded controllers.
---
 pkgs/os-specific/linux/msi-ec/default.nix     | 49 +++++++++++++++++++
 .../os-specific/linux/msi-ec/patches/Makefile | 21 ++++++++
 pkgs/top-level/linux-kernels.nix              |  2 +
 3 files changed, 72 insertions(+)
 create mode 100644 pkgs/os-specific/linux/msi-ec/default.nix
 create mode 100644 pkgs/os-specific/linux/msi-ec/patches/Makefile

diff --git a/pkgs/os-specific/linux/msi-ec/default.nix b/pkgs/os-specific/linux/msi-ec/default.nix
new file mode 100644
index 000000000000000..facdd6d1cb9bbe8
--- /dev/null
+++ b/pkgs/os-specific/linux/msi-ec/default.nix
@@ -0,0 +1,49 @@
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  linuxPackages,
+  kernel ? linuxPackages.kernel,
+}:
+stdenv.mkDerivation {
+  pname = "msi-ec-kmods";
+  version = "0-unstable-2024-09-19";
+
+  src = fetchFromGitHub {
+    owner = "m1dugh";
+    repo = "msi-ec";
+    rev = "60aad95e2c8948140232f4c4d70f4ceba821d5a5";
+    hash = "sha256-qgM4KeGoLvbVsii5YR3GTGi2MVlU+JeArzEoA+6A3a0=";
+  };
+
+  dontMakeSourcesWritable = false;
+
+  patchPhase = ''
+    cp ${./patches/Makefile} ./Makefile
+  '';
+
+  hardeningDisable = [
+    "pic"
+  ];
+
+  makeFlags = kernel.makeFlags ++ [
+    "KERNELDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "INSTALL_MOD_PATH=$(out)"
+  ];
+
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
+  buildFlags = [ "modules" ];
+  installTargets = [ "modules_install" ];
+
+  enableParallelBuilding = true;
+
+  meta = {
+    description = "Kernel modules for MSI Embedded controller";
+    homepage = "https://github.com/m1dugh/msi-ec";
+    license = lib.licenses.gpl2;
+    maintainers = [ lib.maintainers.m1dugh ];
+    platforms = lib.platforms.linux;
+    broken = kernel.kernelOlder "6.2";
+  };
+}
diff --git a/pkgs/os-specific/linux/msi-ec/patches/Makefile b/pkgs/os-specific/linux/msi-ec/patches/Makefile
new file mode 100644
index 000000000000000..a783b770e373c41
--- /dev/null
+++ b/pkgs/os-specific/linux/msi-ec/patches/Makefile
@@ -0,0 +1,21 @@
+# Out of the box, the build with this Makefile only works in FHS environments,
+# such as on Ubuntu or Debian. On NixOS, you either need to open an FHS
+# environment using a Nix shell or build this from a specially crafted Nix
+# derivation.
+#
+# This file follows the conventions written down here:
+# https://docs.kernel.org/kbuild/modules.html
+# Make it possible to override the kernel src tree location from Nix derivation.
+KERNEL ?= $(shell uname -r)
+KERNELDIR ?= /lib/modules/$(KERNEL)/build/
+.PHONY: default
+default: modules
+# -m: Build as module.
+obj-m = msi-ec.o
+.PHONY: modules
+modules:
+	@#"M=": Module source. Special variable of the kernel's main Makefile.
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
+.PHONY: modules_install
+modules_install:
+	$(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
diff --git a/pkgs/top-level/linux-kernels.nix b/pkgs/top-level/linux-kernels.nix
index cbcee495efd8319..f105725864e9070 100644
--- a/pkgs/top-level/linux-kernels.nix
+++ b/pkgs/top-level/linux-kernels.nix
@@ -615,6 +615,8 @@ in {
 
     nullfs = callPackage ../os-specific/linux/nullfs { };
 
+    msi-ec = callPackage ../os-specific/linux/msi-ec { };
+
   } // lib.optionalAttrs config.allowAliases {
     ati_drivers_x11 = throw "ati drivers are no longer supported by any kernel >=4.1"; # added 2021-05-18;
     hid-nintendo = throw "hid-nintendo was added in mainline kernel version 5.16"; # Added 2023-07-30