[U-Boot] [RFC] mmc: fsl_esdhc: Do not set high speed mode on MX25 and MX51

[Otavio Salvador]

On Wed, Oct 18, 2017 at 1:57 PM, Fabio Estevam <fabio.estevam at nxp.com> wrote:
> Currently when a high speed SD card is connected on MX25 or MX51 boards
> the following error happens:
>
> U-Boot 2017.11-rc2 (Oct 18 2017 - 13:49:26 -0200)
>
> CPU:   Freescale i.MX51 rev3.0 at 800 MHz
> Reset cause: POR
> Board: MX51EVK
> DRAM:  512 MiB
> MMC:   FSL_SDHC: 0, FSL_SDHC: 1
> *** Warning - read failed, using default environment
>
> In:    serial
> Out:   serial
> Err:   serial
> Net:   FEC
> Hit any key to stop autoboot:  0
> => saveenv
> Saving Environment to MMC...
> Writing to MMC(0)... failed
>
> Workaround this issue by not setting the mmc high speed mode flags even
> if the HOSTCAPBLT register reports that the SD card can operate at
> high speed.
>
> Tested on imx51evk and imx25pdk boards.
>
> Signed-off-by: Fabio Estevam <fabio.estevam at nxp.com>

Tested-by: Otavio Salvador <otavio at ossystems.com.br> # imx25pdk

I had this error when booting here and I can confirm it fixes the issue for me.

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
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