From: Sam Ravnborg <sam@ravnborg.org>
To: Christian Hemp <c.hemp@phytec.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] mtd: nand_mxs: fix NAND error when change clk rate
Date: Wed, 21 Dec 2016 23:29:23 +0100 [thread overview]
Message-ID: <20161221222923.GB24177@ravnborg.org> (raw)
In-Reply-To: <1482356321-19996-1-git-send-email-c.hemp@phytec.de>
Hi Christian.
On Wed, Dec 21, 2016 at 10:38:41PM +0100, Christian Hemp wrote:
> The function "nand_enable_edo_mode" changed the NAND clk rate, without turning
> it off. In this case it is posible to get the following errors:
> MXS NAND: Error sending command
> MXS NAND: Error sending command
> MXS NAND: DMA read error
>
> This can be fixed if the NAND clk is disabled before we change the clk
> rate.
Very interesting.
I have ~50 targets and a few of these are used for power cycle tests.
On one of these targets I have seen this exact same pattern - once...
Can you give any hints that makes it simpler to verify your fix or anything?
This is a board with i.MX6 SoloCore - where we have 2 GiB FLASH + 512 MB RAM.
Anyway - it saved my day to see this landing on the mailing list!
Sam
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next prev parent reply other threads:[~2016-12-21 22:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-21 21:38 Christian Hemp
2016-12-21 22:29 ` Sam Ravnborg [this message]
2016-12-22 8:50 ` Christian Hemp
2016-12-22 17:55 ` Sam Ravnborg
2016-12-23 10:39 ` Sam Ravnborg
2016-12-27 17:07 ` Fabio Estevam
2017-01-09 10:21 ` Sascha Hauer
2017-08-21 16:26 ` Uwe Kleine-König
2017-08-21 16:31 ` Fabio Estevam
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