linux-kernel - Re: [PATCH 1/3] ARM: mmp: add sram allocator

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Date:	Mon, 15 Aug 2011 11:09:21 +0200
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Leo Yan <leoy@...vell.com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Haojian Zhuang <hzhuang1@...vell.com>,
	Russell King <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] ARM: mmp: add sram allocator

On 10:59 Mon 15 Aug     , Arnd Bergmann wrote:
> On Monday 15 August 2011 11:09:52 Leo Yan wrote:
> > On mmp platform, there have two sram banks:
> > audio sram and internal sram. The audio sram is mainly for audio;
> > the internal sram is for video, wtm and power management.
> > So add the sram allocator using genalloc to manage them.
> > 
> > Every sram bank will register its own platform device
> > info, after the sram allocator create the generic pool
> > for the sram bank, the user module can use the pool's
> > name to get the pool handler; then it can use the handler
> > to alloc/free memory with genalloc APIs.
> > 
> > Signed-off-by: Leo Yan <leoy@...vell.com>
> > ---
> >  arch/arm/Kconfig                      |    1 +
> >  arch/arm/mach-mmp/Makefile            |    2 +-
> >  arch/arm/mach-mmp/include/mach/sram.h |   35 +++++++
> >  arch/arm/mach-mmp/sram.c              |  168 +++++++++++++++++++++++++++++++++
> >  4 files changed, 205 insertions(+), 1 deletions(-)
> >  create mode 100644 arch/arm/mach-mmp/include/mach/sram.h
> >  create mode 100644 arch/arm/mach-mmp/sram.c
> 
> Some time ago, there was talk of merging the existing sram drivers
> and creating a common driver that is easy to hook into.
> 
> What has happened with that? My feeling is that we should stop adding
> more drivers like this in the platform code but rather put an
> authoritative copy into arch/arm/mm/ or even the top-level mm/ directory
> and change over the existing drivers to hook into that one.
no need anymore I send patch to add the support of phys/virt to genalloc so
now we just have to use it

Best Regards,
J.
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