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

[Peng Fan]

Hi Faiz,

It's 2 months since this patchset out (:
> 
> 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.

What issue do you see? I did not test SPL MMC with HS400 support.  You mean only add a Kconfig
entry SPL_MMC_HS400_SUPPORT?

Regards,
Peng.

> 
> Thanks,
> Faiz