Apologies, I was pointing out the commit message itself rather than the contents of the commit, it's indeed full of magic numbers. It's reverse engineered, there are no docs from Qualcomm.
This is commit is plumbing work fixing GPIO support, which indirectly makes the keyboard work. I don't have any boot logs for the machine, but as I understand they have standard Microsoft-compatible HID keyboards/touchpads that work with OpenBSD's existing drivers.