I come from a python background and recently I've been wanting to start

writing drivers for Linux. I looked at several different resources (A

bunch of docs written by GKH, JCorbet, and etc.) and they have been of

great help. However, I have some questions which were not really

answered. Any help would be greatly appreciated.
 1. I am familiar with C but have never really written a driver. What

are the guidelines? Meaning, what are best practices on how to write

these drivers. Specifically, what should go in header .h files and what

should not (Maybe that's more related to generic C programming...).

When is it appropriate to place them in /usr/include instead of the

driver folder.
 2. What about debugging drivers? I have read a bunch of docs talking

about gdb, kdbg, etc. But again what are best practices here?
 3. How do I know if a driver has already been written? Right now, I

simply do a grep -R trying to match several device name strings.
 4. Tips on how to get started? I have read several example drivers but

are there any 'platinum' class drivers that you can recommend that is

clear and that you recommend regularly to beginners. (Specifically

networking phy drivers in my case.)
I apologize if these questions have been answered/asked before.
Thanks for any help.
Amit
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