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]
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