[U-Boot] [PATCH] Add support for initializing MMC

[Chee, Tien Fong <tien.fong.chee@intel.com>]

On Sat, 2018-12-22 at 13:51 -0700, Simon Glass wrote:
> Hi Tien,
> 
> On Fri, 21 Dec 2018 at 10:50, Chee, Tien Fong <tien.fong.chee@intel.c
> om> wrote:
> > 
> > 
> > On Fri, 2018-12-21 at 10:16 -0700, Simon Glass wrote:
> > > 
> > > Hi,
> > > 
> > > On Fri, 21 Dec 2018 at 01:25, Chee, Tien Fong <tien.fong.chee@int
> > > el.c
> > > om> wrote:
> > > > 
> > > > 
> > > > 
> > > > On Fri, 2018-12-14 at 14:53 +0800, tien.fong.chee at intel.com
> > > > wrote:
> > > > > 
> > > > > 
> > > > > From: Tien Fong Chee <tien.fong.chee@intel.com>
> > > > > 
> > > > > Firmware loader would encounter problem if the MMC is
> > > > > accessed
> > > > > before
> > > > > initializing it. This patch would adding the support of
> > > > > initializing
> > > > > MMC before the MMC is accessed by firmware loader.
> > > > > 
> > > > > Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
> > > > > ---
> > > > >  drivers/misc/fs_loader.c |   31
> > > > > +++++++++++++++++++++++++++++++
> > > > >  1 files changed, 31 insertions(+), 0 deletions(-)
> > > > > 
> > > > Any comment for this patch?
> > > This should not be needed with CONFIG_DM_MMC enabled as it should
> > > be
> > > enough to probe the mmc device. Is that right?
> > No, CONFIG_DM_MMC is required, otherwise compiler would tell you
> > error.
> > This whole mechanism is always developed in DM context.
> > What's your concern? You want me to add CONFIG_DM_MMC or replace
> > with
> > CONFIG_MMC? or You want to improve the document?
> Well, mmc_blk_probe() calls mmc_init() on the device. So instead of
> the code you have, would it be possible to probe the blk device? You
> can use device_find_first_child() for that. Perhaps write a function
> in blk.h which probes the first block device for a parent?
Yeah, sure. Let me find out more info.
> 
> Regards,
> Simon