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Date: Mon, 13 May 2013 22:13:10 +0530
From: Vikram Narayanan <vikram186@gmail.com>
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To: Stefan Roese <sr@denx.de>
Subject: Re: mtd_oobtest fails with GPMI-NAND
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On 5/13/2013 1:31 PM, Stefan Roese wrote:
> On 05/13/2013 04:51 AM, Huang Shijie wrote:
>>>> Also, I don't have enough spare boards to sacrifice it for mtd_torture test.
>>> Yes, I can understand this.
>>>
>>> Huang, do you have any idea on how to proceed here? What else
>>> could/should we test? Any ideas/hints?
>>
>> Currently, the kernel supports three imx6 boards for the gpmi-nand:
>>      imx6q-arm2, imx6q-sabreauto, imx6dl-sabareauto.
>>
>> I am afraid your board is none of them. I doubt your board is not
>> correctly configrated with
>> some timing or signals.
>
> Correct, our board is a custom imx6 board. Basically NAND is working
> just fine (UBI/UBIFS works basically). This board even boots from NAND.
> So at least the pin muxing has to be correct.

If you are missing something very fundamental like the pinmux, I really 
wonder how the board would boot. So I'd say, you got your basic settings 
right.

> Please correct me if I'm wrong, but from my understanding the Linux GPMI
> NAND driver configures the timings. So this is not board platform code
> related but NAND driver related.
>
> Do you have any hints where to "tune/change" some values (timing or
> signal related) to fix this error?

Not sure if this will fix your errors. There is a struct timing in the 
driver (Just give a grep). Update that structure with the timings given 
in your NAND datasheet.

HTH,
Vikram