Re: [PATCH RFC] ARM: clps711x: Partial multiplatform support

[shc_work@mail.ru (Alexander Shiyan)]

Sat, 31 May 2014 20:12:21 +0200 ?? Arnd Bergmann <arnd@arndb.de>:
> On Saturday 31 May 2014 22:00:06 Alexander Shiyan wrote:
> > This patch provide initial partial multiplatform support for CLPS711X CPUs.
> > Not intended for apply, just for comments at now.
> 
> It's great to see you are this close now!
>  
> > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> > index 899afa4..aced2fb 100644
> > --- a/arch/arm/Kconfig
> > +++ b/arch/arm/Kconfig
> > @@ -385,15 +385,9 @@ config ARCH_AT91
> >  	  This enables support for systems based on Atmel
> >  	  AT91RM9200 and AT91SAM9* processors.
> >  
> > -config ARCH_CLPS711X
> > +config CLPS711X_SINGLE
> >  	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
> > -	select ARCH_REQUIRE_GPIOLIB
> > -	select AUTO_ZRELADDR
> > -	select CLKSRC_MMIO
> > -	select COMMON_CLK
> > -	select CPU_ARM720T
> > -	select GENERIC_CLOCKEVENTS
> > -	select MFD_SYSCON
> > +	select ARCH_CLPS711X
> >  	help
> >  	  Support for Cirrus Logic 711x/721x/731x based boards.
> >  
> > diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig
> > index f711498..1802562 100644
> > --- a/arch/arm/mach-clps711x/Kconfig
> > +++ b/arch/arm/mach-clps711x/Kconfig
> > @@ -1,15 +1,34 @@
> > +config ARCH_CLPS711X
> > +	bool
> > +	depends on CLPS711X_SINGLE || CLPS711X_MULTI
> > +	select ARCH_REQUIRE_GPIOLIB
> > +	select AUTO_ZRELADDR
> > +	select CLKSRC_MMIO
> > +	select COMMON_CLK
> > +	select CPU_ARM720T
> > +	select GENERIC_CLOCKEVENTS
> > +	select MFD_SYSCON
> > +
> > +config CLPS711X_MULTI
> > +	bool "Cirrus Logic CLPS711X" if ARCH_MULTI_V4T
> > +	select ARCH_CLPS711X
> > +	help
> > +	  Support for Cirrus Logic CLPS711X-based family of processors.
> 
> The split between single and multi is just intended to be temporary,
> while the framebuffer driver is being sorted out, right?

Yes. This is a general thing why this patch provides "partial" support.

> In general, I'd be happier skipping that stage and going to multiplatform
> for all of clps711x when it's ready, but we can also do it like this
> if  there is a good reason and you have a clear schedule for when to
> remove the _SINGLE part.
> 
> One technicality: this change breaks all defconfig files and user
> .configs. You can avoid that if you keep the name ARCH_CLPS711X for
> either the single- or the multiplatform case and name the common
> option ARCH_CLPS711X_COMMON.

Yes, this is a problem. I thought about the best way to solve the problem
of "flip-flop" Kconfig options, but did not come to a good decision.
I'll have to think about this problem. I will look at your solution to the problem.

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