From: Scott Wood <scottwood@freescale.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] mtd: nand: mxs: reset BCH earlier, too, to avoid NAND startup problems
Date: Tue, 11 Dec 2012 17:23:27 -0600 [thread overview]
Message-ID: <1355268207.16025.1@snotra> (raw)
In-Reply-To: <1354740527-18798-1-git-send-email-w.sang@pengutronix.de> (from w.sang@pengutronix.de on Wed Dec 5 14:48:47 2012)
On 12/05/2012 02:48:47 PM, Wolfram Sang wrote:
> It could happen (1 out of 100 times) that NAND did not start up
> correctly after
> warm rebooting, so we end up with various failures or DMA timed out
> due to a
> stalled BCH. When resetting BCH together with GPMI, the issue could
> not be
> observed anymore (after 10000+ reboots). We probably need the
> consistent state
> already before sending commands to NAND. This behaviour was observed
> in barebox
> and kernel, so I assume it affects U-Boot as well. I chose to keep
> the extra
> reset for BCH when changing the flash layout to be on the safe side.
>
> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
Applied to u-boot-nand-flash
-Scott
prev parent reply other threads:[~2012-12-11 23:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-05 20:48 [U-Boot] [PATCH] mtd: nand: mxs: reset BCH earlier, too, to avoid NAND startup problems Wolfram Sang
2012-12-05 22:28 ` Otavio Salvador
2012-12-05 23:35 ` Fabio Estevam
2012-12-05 23:39 ` Wolfram Sang
2012-12-06 10:11 ` Fabio Estevam
2012-12-11 2:32 ` Marek Vasut
2012-12-11 23:23 ` Scott Wood [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1355268207.16025.1@snotra \
--to=scottwood@freescale.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.