Re: [RFC PATCH 0/3] If an IRQ is a GPIO, request and configure it

Linus Walleij
2011-08-05T20:25:55Z

On Fri, Aug 5, 2011 at 12:30 PM, Ben Dooks <ben-linux@fluff.org> wrote:
> On Fri, Aug 05, 2011 at 10:40:17AM +0100, Russell King - ARM Linux wrote:
>> Trying to go from IRQ to GPIO is not a good idea - most of the
>> IRQ <-> GPIO macros we have today are just plain broken.  Many of them
>> just add or subtract a constant, which means non-GPIO IRQs have an
>> apparant GPIO number too.  Couple this with the fact that all positive
>> GPIO numbers are valid, and this is a recipe for wrong GPIOs getting
>> used and GPIOs being requested for non-GPIO IRQs.
>
> Yes, and there's a pile without these defined/

And I'm piling a few patches *deleting* irq_to_gpio() from platforms that
define but actually don't use it, like U300 and SA1100.

Linus Walleij