git clone https://github.com/xxm1995/realtek-sdk git clone https://github.com/shibby/realtek-sdk-rtl838x These may violate Realtek's license terms if you are not an authorized partner. What specific Realtek chip are you targeting? If you specify the chip model (e.g., RTL8382M switch, RTL8197F router, RTL8822CE Wi-Fi), I can provide more targeted open-source driver sources or public documentation.