Re: [PATCH 2/7] ARM: S5P6440: CPU initialization

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On Fri, Dec 11, 2009 at 12:00:11PM +0100, Marc Zyngier wrote:
> Kukjin Kim <kgene.kim@xxxxxxxxxxx> wrote:

> > +/* define the number of gpios we need to the one after the GPR() range */
> > +#define ARCH_NR_GPIOS		(S5P6440_GPR(S5P6440_GPIO_R_NR) + 1)

> Doing so prevents the use of GPIO expanders. Either provide a config
> option to provide additional GPIO space, or just get rid of the #define.

It also prevents the use of external devices with interrupt controllers
(eg, most PMICs these days).  See the S3C24xx and S3C64xx code for
examples of how to avoid this limit.
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