[PATCH] Make MMCI driver compile without gpiolib

[baruch@tkos.co.il (Baruch Siach)]

Hi Linus,

On Mon, Sep 28, 2009 at 09:00:01PM +0200, Linus Walleij wrote:
> Hm thinking back at this:
> 
> 2009/9/27 Russell King - ARM Linux <linux@arm.linux.org.uk>:
> 
> > The real problem is that U300 doesn't implement gpio_is_valid() -
> > which is part of the GPIO API and not specific to GPIOLIB.
> 
> None of the GPIO drivers in drivers/gpio implement gpio_is_valid()
> though they all select GPIOLIB which in turn selects GENERIC_GPIO.
> 
> With one of them being the PL061 this means that the not so
> unlikely combination of PL061+PL180 will fail to compile (even
> though I'm not aware of such a platform for the time being).

Shouldn't gpio_is_valid() be implemented at the platform code? How should the 
generic GPIO driver know the number of valid GPIO lines, or the number of 
PL061 blocks for that matter?

> Is it worth taking a run over drivers/gpio and try to fix this or
> atleast the PL061 driver? I can have a look at it.

baruch

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