Hello World for Writing Linux Device Drivers?

[Scott Elcomb]

Hi all,

Before I start searching (and a trip to stackoverflow), would anyone
be able to recommend a "Hello, World!" style introduction to writing
linux device drivers?  I just need to create an entry under /dev and
have it return a string when the "device" is read from.

I'm also looking for a basic introduction to kernel development.

TIA,
-- 
  Scott Elcomb
  @psema4 on Twitter / Identi.ca

  Atomic OS: Self Contained Microsystems
  http://code.google.com/p/atomos/

  Clerk of the Pirate Party of Canada
  http://www.pirateparty.ca/
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