[PATCH 1/1] arm: imx: share imx5x_register_gpios for mach-mx5

[u.kleine-koenig@pengutronix.de (Uwe Kleine-König)]

On Thu, Nov 25, 2010 at 04:01:04PM +0800, Richard Zhao wrote:
> 2010/11/25 Uwe Kleine-K?nig <u.kleine-koenig@pengutronix.de>:
> > Hey Richard,
> >
> > On Thu, Nov 25, 2010 at 02:44:48PM +0800, Richard Zhao wrote:
> >> > IMO the machine files shouldn't need to know how many gpio banks are
> >> > available. ?This is a per-SoC thing and so should be set in a SoC function.
> >> But we don't have SoC level device file.
> > Check how I did it for imx{1,21,27,25} in arch/arm/plat-mxc/gpio.c.
> I considered put it there too. but we can not add new defconfig, and
> even can not create new items in Kconfig. So we can not use ifdefs.
Why not add new Kconfig symbols?  Up to now I was unfettered by scruples
adding new ones.

> And per my understanding, mx5x is going to use one zImage, correct?
It should be possible to have a single image for more than one SoC, yes.

> >> > How do you want to continue this change? ?mx51 and mx53 have the same
> >> > number of ports? ?Does mx50 have more or less? ?The addresses are the
> >> > same?
> >> mx53 and mx50 have similar memory map. but mx51 is different. ?Sorry,
> >> I forgot upstream version IO_ADDR can not handler differnt SoC base
> >> addr offset.
> > It might even work in this case, still I prefer a more explicit way.
> >
> >> ? ? ? ? ? ? ?It can not be shared with mx51, but it can be shared with
> >> mx50/53, correct? May plan is mx53/50 share
> >> arch/arm/plat-mxc/include/mach/mx5x.h file.
> > mx5x.h is for mx50 and mx53 but not mx51? ?No please.
> For memory map, mx51 is a special case. From mx53 on , IC tuned memory
> map to support large memory.
> If we use things like mx53-50.h, symbols is hard to define.
> MX53_50_XXX_XXX is wired. Any possibly, we need to add new SoC with
> similar memory map in the future.
I still think defining symbols for a single SoC is fine most of the
time.

Best regards
Uwe

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