update kernel to 6.15 and use acer-wmi-ext module

pkgs/acer-wmi-battery/default.nix

@@ -19,24 +19,26 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [ kernel.moduleBuildDependencies ];
 
-  makeFlags = kernel.makeFlags ++ [
-    "INSTALL_MOD_PATH=$(out)"
+  # Makefile provided in repo is useless, hardcoded paths, not using it
+
+  setSourceRoot = ''
+    export sourceRoot=$(pwd)/source
+  '';
+
+  makeFlags = [
+    "-C"
+    "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "M=$(sourceRoot)"
   ];
 
-  # Makefile provided in repo is useless, hardcoded paths, overwriting it
   patchPhase = ''
-    cat > Makefile <<EOF
-    obj-m += acer-wmi-battery.o
-
-    all:
-    $(printf '\t')make -C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build M=\$(PWD) modules
-
-    modules_install:
-    $(printf '\t')make -C ${kernel.dev}/lib/modules/${kernel.modDirVersion}/build M=\$(PWD) modules_install
+    cat > Kbuild <<EOF
+    obj-m := acer-wmi-battery.o
     EOF
   '';
 
-  buildFlags = [ "all" ];
+  buildFlags = [ "modules" ];
+  installFlags = [ "INSTALL_MOD_PATH=${placeholder "out"}" ];
   installTargets = [ "modules_install" ];
 
   meta = {

pkgs/acer-wmi-ext/default.nix

@@ -0,0 +1,57 @@
+# Custom module for Acer WMI features, like battery charge limit and fan control
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  kernel
+}:
+
+stdenv.mkDerivation {
+  pname = "acer-wmi-ext";
+  version = "0.0.0";
+
+  src = fetchFromGitHub {
+    owner = "TenSeventy7";
+    repo = "acer-wmi-ext";
+    rev = "78aaf9392e1fbdd62c3ec9944e9615505485ec04";
+    sha256 = "sha256-AmhBnZiy7llYqHB9gD6T7lK4L2qhtl5pBWAf+H+V8hE=";
+  };
+
+  nativeBuildInputs = [ kernel.moduleBuildDependencies ];
+
+  # Makefile provided in repo is useless, hardcoded paths, not using it
+
+  setSourceRoot = ''
+    export sourceRoot=$(pwd)/source
+  '';
+
+  makeFlags = [
+    "-C"
+    "${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+    "M=$(sourceRoot)"
+  ];
+
+  patchPhase = ''
+    # Add support for Acer Swift 14 (SFG14-63) model
+    # Using values found by playing with performance settings in acer's software on windows
+    # https://github.com/hirschmann/nbfc/wiki/Probe-the-EC's-registers
+    # Also, disable USB control because not sure, need to verify
+    patch -p1 < ${./sfg14-63.patch}
+
+    # Create Kbuild file for module
+    cat > Kbuild <<EOF
+    obj-m := acer-wmi-ext.o
+    EOF
+  '';
+
+  buildFlags = [ "modules" ];
+  installFlags = [ "INSTALL_MOD_PATH=${placeholder "out"}" ];
+  installTargets = [ "modules_install" ];
+
+  meta = {
+    description = "Acer WMI kernel module for battery charge limit and fan control";
+    homepage = "https://github.com/TenSeventy7/acer-wmi-ext";
+    license = lib.licenses.gpl2;
+    platforms = lib.platforms.linux;
+  };
+}

pkgs/acer-wmi-ext/sfg14-63.patch

@@ -0,0 +1,44 @@
+diff --git a/acer-wmi-ext.c b/acer-wmi-ext.c
+index 24112bf..7829c19 100644
+--- a/acer-wmi-ext.c
++++ b/acer-wmi-ext.c
+@@ -69,9 +69,9 @@ struct set_battery_health_control_output {
+ 
+ enum battery_mode { HEALTH_MODE = 1, CALIBRATION_MODE = 2 };
+ 
+-#define ACER_SYSTEM_CONTROL_MODE_EC_OFFSET 0x45
++#define ACER_SYSTEM_CONTROL_MODE_EC_OFFSET 0x10
+ enum system_control_mode {
+-	   	SYSTEM_CONTROL_BALANCED = 1,
++	   	SYSTEM_CONTROL_BALANCED = 0,
+ 		SYSTEM_CONTROL_SILENT = 2,
+ 		SYSTEM_CONTROL_PERFORMANCE = 3,
+ };
+@@ -146,9 +146,9 @@ static struct quirk_entry quirk_unknown = {
+ static struct quirk_entry quirk_acer_system_control_mode = {
+ 	.system_control_mode = 1,
+ };
+-static struct quirk_entry quirk_acer_sfg174_73 = {
++static struct quirk_entry quirk_acer_sfg14_63 = {
+ 	.system_control_mode = 1, // Enable system control mode for this model
+-	.usb_charge_mode = 1, // Enable USB charge mode for this model
++	.usb_charge_mode = 0, // Disable USB charge mode for this model
+ };
+ 
+  /*
+@@ -165,12 +165,12 @@ static int __init dmi_matched(const struct dmi_system_id *dmi)
+ static const struct dmi_system_id acer_quirks[] __initconst = {
+ 	{
+ 		.callback = dmi_matched,
+-		.ident = "Acer Swift SFG14-73",
++		.ident = "Acer Swift SFG14-63",
+ 		.matches = {
+ 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+-			DMI_MATCH(DMI_PRODUCT_NAME, "Swift SFG14-73"),
++			DMI_MATCH(DMI_PRODUCT_NAME, "Swift SFG14-63"),
+ 		},
+-		.driver_data = &quirk_acer_sfg174_73,
++		.driver_data = &quirk_acer_sfg14_63,
+ 	},
+ };
+