From: Wolfram Sang <w.sang@pengutronix.de>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] mtd: nand: mxs: reset BCH earlier to avoid NAND startup problems
Date: Wed, 5 Dec 2012 19:42:10 +0100 [thread overview]
Message-ID: <20121205184210.GA9329@pengutronix.de> (raw)
In-Reply-To: <20121205183732.GK10369@pengutronix.de>
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On Wed, Dec 05, 2012 at 07:37:32PM +0100, Sascha Hauer wrote:
> On Wed, Dec 05, 2012 at 03:53:53PM +0100, Wolfram Sang wrote:
> > It could happen (1 out of 100 times) that NAND did not start up
> > correctly after warm rebooting, so barebox could not find its
> > environment or DMA timed out due to a stalled BCH. When resetting BCH
> > together with GPMI, the issue could not be observed anymore. We probably
> > need the consistent state already before sending commands to NAND.
>
> The subject suggests that the BCH engine is resetted earlier, but
> instead of moving the reset this patch adds another reset. Is this
> intended?
Yes, I wanted to keep resetting BCH before applying a new layout. Maybe
the subject should have been named "earlier, too,". I can drop the other
check and rerun my tests if this seems overcautios to you.
Thanks,
Wolfram
--
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2012-12-05 18:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-05 14:53 [PATCH] mtd: nand: mxs: reset BCH earlier to avoid NAND startup problems Wolfram Sang
2012-12-05 18:37 ` Sascha Hauer
2012-12-05 18:42 ` Wolfram Sang [this message]
2012-12-05 18:50 ` Sascha Hauer
2012-12-05 19:02 ` [PATCH V2] mtd: nand: mxs: reset BCH earlier, too, " Wolfram Sang
2012-12-06 7:43 ` Sascha Hauer
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