linux-kernel - RE: [microblaze-uclinux] [PATCH 11/11] microblaze: Kconfig: Enable drivers for Microblaze

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Date:	Fri, 17 Apr 2009 10:21:46 -0700
From:	Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
To:	<microblaze-uclinux@...e.uq.edu.au>,
	"John Williams" <john.williams@...alogix.com>
CC:	<linux-kernel@...r.kernel.org>, "Michal Simek" <monstr@...str.eu>
Subject: RE: [microblaze-uclinux] [PATCH 11/11] microblaze: Kconfig: Enable drivers for Microblaze



> -----Original Message-----
> From: owner-microblaze-uclinux@...e.uq.edu.au [mailto:owner-microblaze-uclinux@...e.uq.edu.au] On
> Behalf Of Grant Likely
> Sent: Thursday, April 16, 2009 11:52 PM
> To: John Williams
> Cc: microblaze-uclinux@...e.uq.edu.au; linux-kernel@...r.kernel.org; Michal Simek
> Subject: Re: [microblaze-uclinux] [PATCH 11/11] microblaze: Kconfig: Enable drivers for Microblaze
> 
> On Thu, Apr 16, 2009 at 11:01 PM, John Williams
> <john.williams@...alogix.com> wrote:
> > On Thu, Apr 16, 2009 at 7:56 PM,  <monstr@...str.eu> wrote:
> >> From: Michal Simek <monstr@...str.eu>
> >>
> >> Signed-off-by: Michal Simek <monstr@...str.eu>
> >
> > ACK from a MicroBlaze perspective, but some other comments below:
> 
> Acked-by: Grant Likely <grant.likely@...retlab.ca>
> 
> But I'm not sure who should pick this up.
> 
> >
> > A note more for the Xilinx PPC folks (ie Grant Likely):
> >
> > Shouldn't some of these Kconfig depends for PPC be unified?  We have:
> >
> >>  config XILINX_SYSACE
> >>        tristate "Xilinx SystemACE support"
> >> -       depends on 4xx
> >> +       depends on 4xx || MICROBLAZE
> >
> >>  config XILINX_HWICAP
> >>        tristate "Xilinx HWICAP Support"
> >> -       depends on XILINX_VIRTEX
> >> +       depends on XILINX_VIRTEX || MICROBLAZE
> >
> >
> >>  config GPIO_XILINX
> >>        bool "Xilinx GPIO support"
> >> -       depends on PPC_OF
> >> +       depends on PPC_OF || MICROBLAZE
> >>        help
> >>          Say yes here to support the Xilinx FPGA GPIO device
> >
> > Are these all really different options?  PPC_OF?  XILINX_VIRTEX?  4xx?
> 
> xsysace should just depend on either PPC or OF.  It is applicable to
> more than just virtex/spartan systems (I know of at least one
> non-virtex 440 board with a systemace, hence the 4xx usage), and it is
> conceivable that it would be used on other architectures.
> 
> XILINX_VIRTEX makes some sense for hwicap
> 
> PPC_OF doesn't have any real meaning anymore.  PPC would be better.

I'd like to see a single configuration option that makes all of these drivers available.  That way, any processor system (x86, soft arm core, etc.) could turn those on.. The only thing these drivers *REALLY* depend on is OF...  I've circulated patches to do this several times, although they're probably hopelessly out of date at this point.

Steve

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