[PATCH v2 01/12] ARM: Orion: DT support for IRQ and GPIO Controllers
Andrew Lunn
andrew at lunn.ch
Thu Jul 5 07:48:15 EDT 2012
Hi Thomas
> Yes. I am not sure yet how to describe those in the DT, or even if it
> is actually useful to describe them. Wouldn't it be simpler to just
> leave to the user of the GPIO to use a GPIO that's appropriate for its
> usage, i.e not use a GPO when input is needed?
We assume the hardware designer has got the basic hardware right. Its
not going to work otherwise.
What we are trying to detect is a DT author making a typo, assigning a
gpio-key to a GPO pin, for example. The current MPP scheme will detect
this sort of error and issue a warning to the kernel logs.
Andrew
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