onenetbook/4: init, fix stylus

onenetbook/4/goodix-stylus-mastykin/Makefile

@@ -0,0 +1,7 @@
+obj-m += hid-multitouch-onenetbook4.o
+
+all:
+	make -C $(KERNEL_DIR) M=$(PWD) modules
+
+install:
+	make -C $(KERNEL_DIR) M=$(PWD) modules_install

onenetbook/4/goodix-stylus-mastykin/default.nix

@@ -0,0 +1,49 @@
+{ stdenv, lib, kernel, fetchpatch }:
+
+stdenv.mkDerivation rec {
+  name = "hid-multitouch-onenetbook4-${version}";
+  version = kernel.version;
+
+  hardeningDisable = [ "pic" "format" ];
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
+  src = ./.;
+  patches = [
+    (fetchpatch {
+      url = "https://marc.info/?l=linux-input&m=161847127221531&q=p3";
+      name = "goodix-stylus-mastykin-1-pen-support.patch";
+      sha256 = "sha256-1oc8OvfhScYvtsMeV9A4hU+09i59tEJ6HZS6jspsJR8=";
+    })
+    (fetchpatch {
+      url = "https://marc.info/?l=linux-input&m=161847127221531&q=p4";
+      name = "goodix-stylus-mastykin-2-buttons.patch";
+      sha256 = "sha256-HxmR8iEgoj4PJopGWJdWsjFxbfISwTMzz+HyG81mRG4=";
+    })
+  ];
+
+  postUnpack = ''
+    tar -C goodix-stylus-mastykin \
+      --strip-components=3 -xf ${kernel.src} --wildcards \
+      '*/drivers/hid/hid-ids.h' '*/drivers/hid/hid-multitouch.c'
+  '';
+  patchFlags = "-p3";
+  postPatch = ''
+    mv hid-multitouch.c hid-multitouch-onenetbook4.c
+    substituteInPlace hid-multitouch-onenetbook4.c --replace \
+      '.name = "hid-multitouch",' \
+      '.name = "hid-multitouch-onenetbook4",'
+    substituteInPlace hid-multitouch-onenetbook4.c --replace \
+      I2C_DEVICE_ID_GOODIX_0113 \
+      0x011A
+  '';
+
+  makeFlags = [
+    "KERNEL_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "INSTALL_MOD_PATH=$(out)"
+  ];
+
+  meta = with lib; {
+    description = "hid-multitouch module patched for OneNetbook 4";
+    platforms = platforms.linux;
+  };
+}