AI didn't write a driver for him. He ported the Linux driver to FreeBSD with some assistance from an LLM.
What's more interesting to me is the licensing situation when this is done. Does the use of an LLM complicate it? Or is it just a derivative work which can be published under the ISC license [1] as well?
It wasn't a straight port, he had an LLM write a spec by reviewing the code, and then in another session another LLM did the development. That is basically a Clean-room approach. It would be unlikely there would be much - if any - code that is exactly the same so showing copyright infringement seems very unlikely.