Christian,

Thanks for your thoughtful reply. I've been looking at an extension to IO memory services in the kernel to access a restricted region, and adding parametric enabling of it is a good idea. My thinking was that setting the pin-mux registers should be done a driver separate from the gpio driver and that driver should read a config file to get the settings, then exit. All the use cases I'm dealing with require an initial set up then the applications execute using those settings without changing them.

I'm currently using foc but I intend to go the base-hw route shortly. If time permits, I'll look into using the handle_slow_trap Thread method as learning exercise.

Again, thanks for the reply. Bob

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