[PATCH] mtd: nand_mxs: fix NAND error when change clk rate

Sam Ravnborg sam at ravnborg.org
Wed Dec 21 14:29:23 PST 2016

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!


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