[U-Boot] mmc erase fails from U-Boot command line

[Eric Nelson <eric@nelint.com>]

Hi all,

On 11/16/2015 08:30 AM, Fabio Estevam wrote:
> On Mon, Nov 16, 2015 at 1:23 PM, Fabio Estevam <festevam@gmail.com> wrote:
>> Hi Hector,
>>
>> On Fri, Nov 13, 2015 at 12:37 PM, Fabio Estevam <festevam@gmail.com> wrote:
>>> On Fri, Nov 13, 2015 at 10:26 AM, Palacios, Hector
>>> <Hector.Palacios@digi.com> wrote:
>>>
>>>> Could it be a silicon revision issue?
>>>> My CPU is i.MX6Q rev1.2.
>>>
>>> I will try to test this on other sabresd boards next week.
>>
>> I tested this on other mx6qsabresd board I have and I could see the error.
>>
>> The board that failed is revC2
> 
> Boards revC2 and revC4 failed. (Both are TO1.2)
> 
> Board revB (with TO1.1) works fine.
>

I've also recently seen this on two different custom boards. Both are
running i.MX6Q TO1.2 and both are using eMMC from Micron.

The code which is generating the error message:

	http://git.denx.de/?p=u-boot.git;a=blob;f=drivers/mmc/fsl_esdhc.c;h=c5054d66bdcda029f0485958c87bd5154ccee591;hb=HEAD#l390

Seems to refer to an errata for the i.MX35 (ENGcm03648):
	http://cache.freescale.com/files/dsp/doc/errata/IMX35CE.pdf

I don't see any reference to the errata in the i.MX6 docs.

Ignoring the error (removing the return statement) seems to leave things
in a workable state, so I suspect the problem isn't with an insufficient
timeout.

Regards,


Eric