From: Marek Vasut <marek.vasut@gmail.com>
To: Huang Shijie <b32955@freescale.com>
Cc: baruch@tkos.co.il, koen.beel.barco@gmail.com,
Wolfram Sang <w.sang@pengutronix.de>,
linux-mtd@lists.infradead.org, Artem.Bityutskiy@intel.com,
shijie8@gmail.com, linux-arm-kernel@lists.infradead.org,
LW@karo-electronics.de
Subject: Re: [PATCH v2] MTD/GPMI bugfix : reset the BCH module when it is not MX23
Date: Sat, 31 Dec 2011 04:15:02 +0100 [thread overview]
Message-ID: <201112310415.02867.marek.vasut@gmail.com> (raw)
In-Reply-To: <4EFE7236.10609@freescale.com>
> Hi,
>
> > On Fri, Dec 30, 2011 at 04:27:26PM +0800, Huang Shijie wrote:
> >> In MX28, if we do not reset the BCH module. The BCH module may
> >> becomes unstable when the board reboots for several thousands times.
> >
> > Do you have more details when and why this happens? What happens on MX23
> > then?
>
> In one customer's 3G router which uses the MX28:
> [0] NAND boot mode, mount the UBIFS in the NAND partition.
> [1] We used the gpmi_reset_block(r->bch_regs, true) to init the BCH module.
> [2] The board will automatically reboot again after it booted by NAND
> boot mode.
> [3] After reboot more then thousands times(cost nearly one day), the BCH
> mode became UNSTABLE,
> the data read out was not right, so the system could not mount the UBIFS.
>
> After we use gpmi_reset_block(r->bch_regs, false) to init the BCH
> module, the bug never happens.
>
>
>
> The gpmi_reset_block() was coded to avoid the NAND boot bug in MX23. So
> MX23 does not have the bug.
>
> >> Signed-off-by: Huang Shijie <b32955@freescale.com>
> >
> > Is this Bug 2847 from the errata? Should be mentioned in the commit
> > message and
>
> Yes, this is the bug 2847 from the mx23's errata.
>
> I will add some comments to it.
>
> Best Regards
> Huang Shijie
>
> > comments of the patch if so.
> >
> > Regards,
> >
> > Wolfram
Ah, so you confirmed it's a problem with the silicon. Good
next prev parent reply other threads:[~2011-12-31 3:15 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-30 8:27 [PATCH v2] MTD/GPMI bugfix : reset the BCH module when it is not MX23 Huang Shijie
2011-12-30 14:01 ` Marek Vasut
2011-12-30 14:36 ` Wolfram Sang
2011-12-31 2:23 ` Huang Shijie
2011-12-31 3:15 ` Marek Vasut [this message]
2011-12-31 3:31 ` Huang Shijie
2011-12-31 4:45 ` Marek Vasut
2011-12-31 15:43 ` Wolfram Sang
2012-01-01 15:23 ` Huang Shijie
2012-01-01 22:33 ` Wolfram Sang
2012-01-03 2:30 ` Huang Shijie
2012-01-03 11:11 ` Wolfram Sang
2012-01-04 2:43 ` Huang Shijie
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