add sample script to build 3rd r8125 driver

.github/workflows/build.yml

@@ -258,6 +258,13 @@ jobs:
         ./build.sh uboot
         ./build.sh kernel
 
+        ## If you want to compile a driver from source, here is an example
+        # case ${{ matrix.CPU }} in
+        # rk3568)
+        #     ../scripts/3rd/add_r8125.sh
+        #     ;;
+        # esac
+
     - name: Build sd image
       id: build_sd_image
       run: |

scripts/3rd/add_r8125.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -eu
+top_path=$(pwd)
+
+# prepare toolchain and get the kernel version
+export PATH=/opt/FriendlyARM/toolchain/11.3-aarch64/bin/:$PATH
+pushd kernel
+    kernel_ver=`make CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 kernelrelease`
+popd
+modules_dir=$(readlink -f ./out/output_*_kmodules/lib/modules/${kernel_ver})
+[ -d ${modules_dir} ] || {
+	echo "please build kernel first."
+	exit 1
+}
+
+# build kernel driver
+git clone https://github.com/zeroday0619/r8125 -b main
+pushd r8125/src
+	make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -C ${top_path}/kernel M=$(pwd)
+	aarch64-linux-gnu-strip --strip-unneeded r8125.ko
+	cp r8125.ko ${modules_dir}/
+popd
+
+# prepare rootfs overlay
+tmp_dir="${top_path}/r8125-files/etc/modules.d/"
+mkdir ${tmp_dir} -p
+echo "r8125" > ${tmp_dir}/10-r8125
+echo "FRIENDLYWRT_FILES+=(r8125-files)" >> .current_config.mk