--- /dev/null
+#
+# Copyright (C) 2021 The LineageOS Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+ifeq ($(TARGET_PREBUILT_KERNEL),)
+RTKBTUSB_PATH := $(abspath $(call my-dir))
+RTKBTUSB_CONFIGS := CONFIG_BT_RTKBTUSB=m
+
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := rtk_btusb
+LOCAL_MODULE_SUFFIX := .ko
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR)/lib/modules
+
+_rtkbtusb_intermediates := $(call intermediates-dir-for,$(LOCAL_MODULE_CLASS),$(LOCAL_MODULE))
+_rtkbtusb_ko := $(_rtkbtusb_intermediates)/$(LOCAL_MODULE)$(LOCAL_MODULE_SUFFIX)
+KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
+RTKBTUSB_ABSOLUTE := $(abspath $(_rtkbtusb_intermediates))
+
+$(_rtkbtusb_ko): $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/$(BOARD_KERNEL_IMAGE_NAME)
+ @mkdir -p $(dir $@)
+ @cp -R $(RTKBTUSB_PATH)/* $(_rtkbtusb_intermediates)/
+ $(hide) +$(KERNEL_MAKE_CMD) $(PATH_OVERRIDE) $(KERNEL_MAKE_FLAGS) -C $(KERNEL_OUT) M=$(abspath $(_rtkbtusb_intermediates)) ARCH=$(TARGET_KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(RTKBTUSB_CONFIGS) modules
+ $(KERNEL_TOOLCHAIN_PATH)strip --strip-unneeded $@;
+
+include $(BUILD_SYSTEM)/base_rules.mk
+endif