From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fabio Estevam <festevam@gmail.com>
Date: Fri, 4 Dec 2015 22:19:05 -0200
Subject: [U-Boot] mmc erase fails from U-Boot command line
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Hi Eric,

On Fri, Dec 4, 2015 at 8:42 PM, Eric Nelson <eric@nelint.com> wrote:

> I've figured out a way to repeat this on my machine.
>
> If I write 0xff's to the eMMC blocks, then issue an erase for the same,
> I get the problem with each MMC_ERASE command.
>
> I've also found something that fixes the issue in my testing.
>
> Changing SECURE_ERASE to 0 from 0x80000000 in include/mmc.h allows
> things to function for me.
>
> Page 115 of the JEDEC eMMC 4.5 spec says that bit 31 is obsolete and
> should be zero:
>         http://www.jedec.org/sites/default/files/docs/jesd84-B45.pdf
>
> Hector and Fabio, can you test that change?
>
> Please advise,

That sounds promising. I will test it on Monday when I get access to a
revC4 board.

Thanks a lot!