linux-kernel - Re: [PATCH 04/57] microblaze

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Message-ID: <20090323205305.GA10576@oksana.dev.rtsoft.ru>
Date:	Mon, 23 Mar 2009 23:53:05 +0300
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	monstr@...str.eu, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org, john.williams@...alogix.com
Subject: Re: [PATCH 04/57] microblaze_v7: Open firmware files

On Mon, Mar 23, 2009 at 07:51:23PM +0100, Arnd Bergmann wrote:
> On Wednesday 18 March 2009, monstr@...str.eu wrote:
> > From: Michal Simek <monstr@...str.eu>
> > 
> > 
> > Signed-off-by: Michal Simek <monstr@...str.eu>
> > ---
> >  arch/microblaze/include/asm/of_device.h   |   45 ++
> >  arch/microblaze/include/asm/of_platform.h |   64 ++
> >  arch/microblaze/include/asm/prom.h        |  313 ++++++++
> >  arch/microblaze/kernel/of_device.c        |  115 +++
> >  arch/microblaze/kernel/of_platform.c      |  201 +++++
> >  arch/microblaze/kernel/prom.c             | 1147 +++++++++++++++++++++++++++++
> >  arch/microblaze/kernel/prom_parse.c       | 1025 ++++++++++++++++++++++++++
> >  7 files changed, 2910 insertions(+), 0 deletions(-)
> >  create mode 100644 arch/microblaze/include/asm/of_device.h
> >  create mode 100644 arch/microblaze/include/asm/of_platform.h
> >  create mode 100644 arch/microblaze/include/asm/prom.h
> >  create mode 100644 arch/microblaze/kernel/of_device.c
> >  create mode 100644 arch/microblaze/kernel/of_platform.c
> >  create mode 100644 arch/microblaze/kernel/prom.c
> >  create mode 100644 arch/microblaze/kernel/prom_parse.c
> 
> Since these files are derived from the powerpc versions, what is the
> plan on them? IIRC, you had them in a common directory in an earlier
> version. Are you planning to merge them at some point in the future
> or do you intend to maintain a fork?

Actually, it's trivial to factor out all the common code out of
arch/powerpc/ to drivers/of/.

It took me approx. 4 hours to factor out the code and make a
proof-of-concept FDT support for a little-endian ARM platform. ;-)
(The device tree was only describing a cpu and a nor flash, though.
No support for interrupt- and gpio-controllers. And no support for
U-Boot, I just built the dtb file into the kernel).

I never got around to clean it up and send though, but for sure,
there is absolutely no reason to duplicate the code across the
platforms.

Thanks,

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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