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From: Tony Lindgren <tony@atomide.com>
To: Hiroki Kaminaga <kaminaga@sm.sony.co.jp>
Cc: linux-omap-open-source@linux.omap.com
Subject: Re: [PATCH][RFC] update flash timing on OMAP5912OSK
Date: Mon, 20 Feb 2006 15:04:50 -0800	[thread overview]
Message-ID: <20060220230450.GH30248@atomide.com> (raw)
In-Reply-To: <20060220.132145.74756047.kaminaga@sm.sony.co.jp>

* Hiroki Kaminaga <kaminaga@sm.sony.co.jp> [060219 20:29]:
> Hi,
> 
> In linux-2.6.15-omap1 patch, in arch/arm/mach-omap1/board-osk.c,
> EMIFS_CS3_VAL is set to 0x30003361.
> 
> This was introduced to fix flash timing error.
> http://linux.omap.com/pipermail/linux-omap-open-source/2005-July/004717.html
> 
> On the other hand, in SectionE:Errata in EMIFS timing at:
> http://omap.spectrumdigital.com/osk5912/osk5912_faq.html
> EMIFS_CS3_VAL was set to 0x88013141, fixing write/read rate.
> 
> Reading from
> http://focus.ti.com/lit/ug/spru742/spru742.pdf
> 3.6 EMIFS Registers,
> 
> 0x30003361 will set read mode from "page mode, 4 word/page" to 
> "asynchronous read", and read from flash slowed down.
> 
> I tested with new value 0x88013141, and works good so far.
> 
> Here is a patch against 2.6.15-omap1 patch.

Thanks, pushing today.

Tony

      reply	other threads:[~2006-02-20 23:04 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-20  4:21 [PATCH][RFC] update flash timing on OMAP5912OSK Hiroki Kaminaga
2006-02-20 23:04 ` Tony Lindgren [this message]

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