[RFC PATCH] ARM: vt8500: Convert arch-vt8500 to multiplatform

[linux@prisktech.co.nz (Tony Prisk)]

On Fri, 2012-10-12 at 07:52 +0000, Arnd Bergmann wrote:
> On Thursday 11 October 2012, linux at prisktech.co.nz wrote:
> > To clarify what you said (because I'm not sure I got it the first time)...
> > 
> > Keep ARCH_VT8500 as the single-platform Kconfig option.
> > Add a new ARCH_VT8500_MULTI (for example) as the multiplatform Kconfig option.
> > 
> > Have ARCH_VT8500_MULTI select ARCH_VT8500??
> > 
> > The last bit confuses me (and seems a little backwards, although I suspect it
> > would work since none of the options would cause conflicts). Without ARCH_VT8500
> > selected, we have no driver options without changing all the Kconfig's.
> > 
> > If this is correct, we are basically using _MULTI to add more options on top of
> > _VT8500.
> 
> No, this would not work, because Kconfig does not let you 'select' a symbol
> that is inside of a 'choice' list.
> 
> The other way round works though: rename the existing ARCH_VT8500 to
> ARCH_VT8500_SINGLE, and add a new symbol in arch/arm/mach-vt8500/Kconfig
> like
> 
> config VT8500
>        bool "Via/Wondermedia VT8500 / WM8505 / WM8650" if ARCH_MULTI_V5
>        default ARCH_VT8500_SINGLE
> 
> This one becomes visible when ARCH_MULTI_V5 is set but invisible in a
> other cases. The 'default ARCH_VT8500_SINGLE' statement means it is
> automatically enabled (but still invisible) if ARCH_VT8500_SINGLE
> is selected in the 'choice', and it's invisible and disabled in all
> other cases.
> 
> 	Arnd

I will leave the patch as is unless someone specifically needs
earlyprintk in the mean time - at the moment, I don't need it again
until we look to add WM8750 and WM8850 (Framebuffer problems at the
moment).

There is plenty of other stuff to do for the existing platforms, and
earlyprintk will be re-enabled once the support is readded.

Tony P