From: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
To: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: 'Sneha Narnakaje' <nsnehaprabha@ti.com>,
davinci-linux-open-source@linux.davincidsp.com,
linux-mtd@lists.infradead.org,
'Wolfram Sang' <w.sang@pengutronix.de>
Subject: RE: [RFC] nand/davinci: Fix comment to match the code
Date: Wed, 25 Aug 2010 15:55:06 +0300 [thread overview]
Message-ID: <1282740906.24044.210.camel@localhost> (raw)
In-Reply-To: <039d01cb4450$e8f7d6a0$bae783e0$@raj@ti.com>
On Wed, 2010-08-25 at 17:57 +0530, Sudhakar Rajashekhara wrote:
> > --- a/drivers/mtd/nand/davinci_nand.c
> > +++ b/drivers/mtd/nand/davinci_nand.c
> > @@ -369,8 +369,9 @@ compare:
> > * after setting the 4BITECC_ADD_CALC_START bit. So if you immediately
> > * begin trying to poll for the state, you may fall right out of your
> > * loop without any of the correction calculations having taken place.
> > - * The recommendation from the hardware team is to wait till ECC_STATE
> > - * reads less than 4, which means ECC HW has entered correction state.
> > + * The recommendation from the hardware team is to initially delay as
> > + * long as ECC_STATE reads less than 4. After that, ECC HW has entered
> > + * correction state.
> > */
> > do {
> > ecc_state = (davinci_nand_readl(info,
> > --
>
> Thanks for pointing this out, but I have already corrected this and submitted
> the patch. Artem Bityutskity has pushed this patch to his l2-mtd-2.6 / master
> tree.
If you mean
commit 1c3275b656045aff9a75bb2c9f3251af1043ebb3
Author: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Date: Tue Jul 20 15:24:01 2010 -0700
mtd: nand: davinci: correct 4-bit error correction
On TI's DA830/OMAP-L137, DA850/OMAP-L138 and DM365, after setting the
4BITECC_ADD_CALC_START bit in the NAND Flash control register to 1 and
before waiting for the NAND Flash status register to be equal to 1, 2 or
3, we have to wait till the ECC HW goes to correction state. Without this
wait, ECC correction calculations will not be proper.
This has been tested on DA830/OMAP-L137, DA850/OMAP-L138, DM355 and DM365
EVMs.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Acked-by: Sneha Narnakaje <nsnehaprabha@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
then it is already in upstream in Linus' tree. I do not have anything else from you.
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
next prev parent reply other threads:[~2010-08-25 12:57 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-25 12:18 [RFC] nand/davinci: Fix comment to match the code Wolfram Sang
2010-08-25 12:27 ` Sudhakar Rajashekhara
2010-08-25 12:55 ` Artem Bityutskiy [this message]
2010-08-25 13:30 ` Wolfram Sang
2010-08-26 3:59 ` Sudhakar Rajashekhara
2010-08-26 6:23 ` Wolfram Sang
2010-09-01 8:05 ` Wolfram Sang
2010-09-01 23:14 ` Artem Bityutskiy
2010-09-03 10:35 ` [PATCH] nand/davinci: relax a timeout for ECC-initialization Wolfram Sang
2010-09-03 11:12 ` Sudhakar Rajashekhara
2010-09-03 12:15 ` Wolfram Sang
2010-09-07 8:00 ` Artem Bityutskiy
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