Jesse Off said;

> I've been toying with the idea of attempting a full abstraction of GPIO
> (aka bit-bang) buses for devices such as LCD's and keypads.  Drivers would
> register their pins and their capabilities (in, out, in/out,
> open-collector, pull-up/down resistors, current capabilities, TTL/CMOS
> levels, etc...)

That's a good idea.  The area has been left unstructured by NetBSD software.
And beware, please.  The key is to design software interface, aka API.  The
fundamental issues in Linux camp are they are too HW-centric, driven by
specific engineerings.  The consequence is rather littered outcome like as
MTD or what-so-ever their misguided disciplines.  As technology evolves,
such the solution gets messer, by short-sighted bubbling sub-projects.

Toru Nishimura/ALKYL Technology