From: Marek Vasut <marex@denx.de>
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 03:32:29 +0100 [thread overview]
Message-ID: <201212110332.29853.marex@denx.de> (raw)
In-Reply-To: <1354740527-18798-1-git-send-email-w.sang@pengutronix.de>
Dear Wolfram Sang,
> 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>
[...]
Good, thanks. Ccing Scott to pick this up.
Acked-by: Marek Vasut <marex@denx.de>
Best regards,
Marek Vasut
next prev parent reply other threads:[~2012-12-11 2:32 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 [this message]
2012-12-11 23:23 ` Scott Wood
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