I would say it's both the user application and the system calls. Here is the man page of the driver for the wireless card in my laptop https://man.openbsd.org/

I would say it's both the user application and the system calls. Here is the man page of the driver for the wireless card in my laptop https://man.openbsd.org/iwm.4 https://man.openbsd.org/iwm.4 It's clear and concise, has links to the related tools that I might need to get the card working. Is there a similar man page for Linux? I'm not sure, honestly. Copy and paste? You'd have to copy and paste the whole driver for a start.