[U-Boot] [PATCH] mmc: mx6qsabrelite: fsl_esdhc: Define maximum bus width supported by SabreLite board

[Eric Nelson]

Thanks Abbas,

On 03/20/2013 11:38 PM, Abbas Raza wrote:
> From: Abbas Raza <Abbas_Raza at mentor.com>
>
> Maximum bus width supported by SabreLite board is not 8bit like
> all other mx6q specific boards. In case where both host controller
> and card support 8bit transfers, they agree to communicate on 8bit
> interface while boards like the SabreLite support only 4bit interface.
> Due to this reason the mmc 8bit default mode fails on the SabreLite.
> To rectify this, define maximum bus width supported by this board (4bit).
> If max_bus_width is not defined, it is 0 by default and 8bit width support
> will be enabled in host capabilities otherwise host capabilities are modified
> accordingly.
>
> It is tested with a MMCplus card.
>
> Signed-off-by: Abbas Raza <Abbas_Raza at mentor.com>
> cc: stefano Babic <sbabic at denx.de>
> cc: Andy Fleming <afleming at gmail.com>
> Acked-by: Dirk Behme <dirk.behme at de.bosch.com>
> Acked-by: Andrew Gabbasov <andrew_gabbasov at mentor.com>
> ---
>   board/freescale/mx6qsabrelite/mx6qsabrelite.c | 3 +++
>   drivers/mmc/fsl_esdhc.c                       | 7 +++++++
>   include/fsl_esdhc.h                           | 1 +
>   3 files changed, 11 insertions(+)
>

Tested-by: Eric Nelson <eric.nelson at boundarydevices.com>

Note that the board settings also apply to nitrogen6x and wandboard
if you want to expand the patch a bit:

	http://git.denx.de/u-boot.git/?p=u-boot/u-boot-imx.git;a=blob;f=board/boundary/nitrogen6x/nitrogen6x.c;h=229c2378396d43a365d6682af35c0e519ccd69d4;hb=HEAD#l304
	http://git.denx.de/u-boot.git/?p=u-boot/u-boot-imx.git;a=blob;f=board/wandboard/wandboard.c;h=d95189f77de4c3573ec30c53e04fe1b083c1d2b5;hb=HEAD#l107

I also tested against a custom board with 8-bit eMMC.

Regards,


Eric