Re: [PATCH 1/1] Revert "nand_base: detect more ONFI flash"

["Eric Bénard" <eric@eukrea.com>]

Hi Jean-Christophe,

Le Wed, 8 May 2013 15:30:24 +0800,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> a écrit :

> 
> On May 8, 2013, at 1:11 PM, Sascha Hauer <s.hauer@pengutronix.de> wrote:
> 
> > On Tue, May 07, 2013 at 10:21:39PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >> this brake the nand support on at91sam9x5ek
> >> where we have a non compliant ONFI nand
> >> NAND device: Manufacturer ID: 0xad, Chip ID: 0xda (Hynix NAND 256MiB 3,3V 8-bit), 256MiB, page size: 2048, OOB size: 64
> >> 
> >> This reverts commit 4c2bdc8728016b3412523e3264651651fe752860.
> > 
> > Thank you for letting us know that this patch causes a regression for
> > you. I this happens, please first try and fix the regression. If that
> > doesn't work please tell us what about the original patch is so wrong
> > that it needs to be reverted. With a good explanation it could be that
> > someone else has an idea. And whatever you do, put the original author,
> > Eric in this case, on Cc.
> 
> This commit was supposed just able to detect that a Nand is ONFI
> 
> but instead it brake supported Nand
> 
> So Eric can fix it but I've not time to debug this before 1 month
> and the few platform that use ONFI are all busy
> 
> So as the commit just allow to detect a band is ONFI can we revert it
> 
> to keep non-ONFI Nand to work
> 
IIRC, I tested this patch on some i.MX board with non ONFI NAND flash
and that worked fine unless I made a mistake in my tests which is
always possible.

I've just sent a patch which may fix your problem, please give it a try
(only compile tested, not tested on real hardware).

Eric


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