[U-Boot] [PATCH V3 1/2] mmc: add HS400 support

[Faiz Abbas]

Hi,

On Saturday 19 May 2018 06:24 PM, Peng Fan wrote:
> Add HS400 support.
> Selecting HS400 needs first select HS199 according to spec, so use
> a dedicated function for HS400.
> Add HS400 related macros.
> Remove the restriction of only using the low 6 bits of
> EXT_CSD_CARD_TYPE, using all the 8 bits.
> 
> Signed-off-by: Peng Fan <peng.fan at nxp.com>
> Cc: Jaehoon Chung <jh80.chung at samsung.com>
> Cc: Jean-Jacques Hiblot <jjhiblot at ti.com>
> Cc: Stefano Babic <sbabic at denx.de>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Kishon Vijay Abraham I <kishon at ti.com>
> Cc: Bin Meng <bmeng.cn at gmail.com>
> ---
> 
> V3:
>  Simplify code
>  add error msg
> 
> V2:
>  remove 4bits support from HS400, as HS400 does not support 4bits per spec.
> 
>  drivers/mmc/Kconfig |   7 +++
>  drivers/mmc/mmc.c   | 137 +++++++++++++++++++++++++++++++++++++++++-----------
>  include/mmc.h       |  11 +++++
>  3 files changed, 128 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
> index 3f15f85efd..a535a87a8e 100644
> --- a/drivers/mmc/Kconfig
> +++ b/drivers/mmc/Kconfig
> @@ -104,6 +104,13 @@ config SPL_MMC_UHS_SUPPORT
>  	  cards. The IO voltage must be switchable from 3.3v to 1.8v. The bus
>  	  frequency can go up to 208MHz (SDR104)
>  
> +config MMC_HS400_SUPPORT
> +	bool "enable HS400 support"
> +	select MMC_HS200_SUPPORT
> +	help
> +	  The HS400 mode is support by some eMMC. The bus frequency is up to
> +	  200MHz. This mode requires tuning the IO.
> +

Please add SPL_MMC_HS400_SUPPORT also.

Thanks,
Faiz