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Date: Tue, 4 Nov 2008 11:42:29 +0000
From: Jamie Lokier <jamie@shareable.org>
To: Andre Puschmann <andre.puschmann@imms.de>
Subject: Re: flash read performance
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Cc: Arnaud Mouiche <arnaud.mouiche@thomson.net>, linux-mtd@lists.infradead.org
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Andre Puschmann wrote:
> Hi,
> 
> I spent some more time on this issue and investigated some mtd-maps
> drivers.
> The kernel I am using is a 2.6.21 that comes out of the gumstix 
> svn-repo. Unfortunately, it uses a legacy driver which only does a
> ioremap() but no ioremap_nocache(). Patching the driver with this
> additional call boosts up transfers up to around 5.5MB/s, which
> is a fairly improvement.
> I will send a patch to the gumstix list. Users of newer kernel might
> not need this, as they use a newer driver (pxa2xx-flash.c) anyway.

I don't know much about this area, but will _writing_ to the flash
work reliably if ioremap_cached() is used?

-- Jamie