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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Wolfram Sang <w.sang@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 19:50:36 +0100	[thread overview]
Message-ID: <20121205185036.GM10369@pengutronix.de> (raw)
In-Reply-To: <20121205184210.GA9329@pengutronix.de>

On Wed, Dec 05, 2012 at 07:42:10PM +0100, Wolfram Sang wrote:
> 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.

change the patch or the subject, either way is fine with me.

Sascha

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  reply	other threads:[~2012-12-05 18:50 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-05 14:53 Wolfram Sang
2012-12-05 18:37 ` Sascha Hauer
2012-12-05 18:42   ` Wolfram Sang
2012-12-05 18:50     ` Sascha Hauer [this message]
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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