As I mentioned in another comment, the original referenced source code from the Linux kernel is ISC'd, not GPL'd. See here: https://github.com/torvalds/linux/blob/master/drivers/net/wi...

I don't work on the Linux kernel, but I do poke around the sources from time to time. I was genuinely surprised to see that some hardware drivers are not GPL'd. That is news to me, but makes commercial sense to when I think deeper about it. When these manufacturers donate a driver to Linux, I don't think GPL is a priority to them. In the case of Broadcom, they probably want their WiFi hardware to more compatible with SBCs to drive sales (of future SBCs that use their WiFi hardware and run Linux). If anything, choosing a more liberal license (ISC) increases the likelihood that their Linux driver will be ported to other operating systems. From Broadcom's commercial view, that is a win to sell more SBCs (free labour from BSDers!).

Also, if the original driver was GPL'd, I am pretty sure it is fair game (from US copyright and software license perspective) to use one LLM to first reverse engineer the GPL'd driver to write a spec. Then use a different LLM to implement a new driver for FreeBSD that is ISC'd. You can certainly do that with human engineers, and I see no reason to believe that US courts would object to separate LLMs being used in the two necessary steps above. Of course, this assumes good faith on the part of the org doing the re-write. (Any commercial org doing this would very carefully document the process, expecting a legal challenge.)

I do think this blog post introduces a genuinely (to me!) novel way to use LLMs. My favourite part of that blog post was talking about all of the attempts that did not work, and new approaches that were required. That sounds pretty similar to my experience as a software engineer. You start with preconceived notions that frequently shattered after you walk down a long and arduous path to discovering your mistakes. Then you stop, re-think things, and move in a new intellectual (design) direction. His final solution of asking LLMs to write a spec, then asking other LLMs to proof-read it is highly ingenious. I am really impressed. Please don't view that "really impressed" as my thinking that the whole world will move to vibe coding; rather I think this is a real achievement that deserves some study by us human engineers.