[U-Boot] [PATCHv5 09/14] mmc: support the DDR mode for eMMC

[Jaehoon Chung]

Hi, Hector.

On 05/21/2014 01:37 AM, Hector Palacios wrote:
> Hi,
> 
> On 05/16/2014 06:59 AM, Jaehoon Chung wrote:
>> Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
>> Tested-by: Lukasz Majewski <l.majewski at samsung.com>
>> Acked-by: Lukasz Majewski <l.majewski at samsung.com>
> 
> What platforms did you test DDR mode on?

I have tested DDR mode with exynos board.

> I tried this on an Freescale i.MX6 based platform but the driver returned error code COM_ERR (-18) when trying to switch to any of the DDR modes. I guess the fsl_esdhc.c driver needs some adaptation for DDR to work.

I didn't know how work DDR mode at fsl_esdhc.c.(If you share the host controller TRM, it's helpful to me.)
Host controller also need to change the DDR mode.

I wonder your board didn't work not to enable the DDR mode?

Best Regards,
Jaehoon Chung

> 
> Best regards,
> -- 
> Hector Palacios
>