The first hardware driver for the Linux kernel explicitly labeled as AI-generated, prom21-xhci, has been introduced, marking a substantial breakthrough for artificial intelligence in system-level low-level development. Led by Jihong Min, the core code of this driver was generated by Codex GPT-5.5. It provides temperature monitoring support for the xHCI controller of AMD's Promontory21 chipset, filling a gap in hardware monitoring for AMD platforms in the Linux environment. Related patches have been submitted for review, and users will be able to enable this feature through the kernel's Kconfig file in the future. This event demonstrates the feasibility of AI-generated low-level code. With the development of large language models (LLMs), AI's role in constructing core modules of operating systems will transition from 'experimental attempts' to 'normalized assistance,' thereby enhancing development efficiency and device adaptation speed.