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

[Simon Glass]

Hi,

On Fri, 21 Dec 2018 at 01:25, Chee, Tien Fong <tien.fong.chee at intel.com> wrote:
>
> On Fri, 2018-12-14 at 14:53 +0800, tien.fong.chee at intel.com wrote:
> > From: Tien Fong Chee <tien.fong.chee at 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 at 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?

Regards,
Simon

>
> > diff --git a/drivers/misc/fs_loader.c b/drivers/misc/fs_loader.c
> > index 57a14a3..744fa46 100644
> > --- a/drivers/misc/fs_loader.c
> > +++ b/drivers/misc/fs_loader.c
> > @@ -12,6 +12,7 @@
> >  #include <linux/string.h>
> >  #include <mapmem.h>
> >  #include <malloc.h>
> > +#include <mmc.h>
> >  #include <spl.h>
> >
> >  DECLARE_GLOBAL_DATA_PTR;
> > @@ -252,6 +253,36 @@ static int fs_loader_ofdata_to_platdata(struct
> > udevice *dev)
> >
> >  static int fs_loader_probe(struct udevice *dev)
> >  {
> > +#ifdef CONFIG_MMC
> > +     int ret;
> > +     struct device_platdata *plat = dev->platdata;
> > +
> > +     ret = mmc_initialize(NULL);
> > +     if (ret) {
> > +             debug("MMC: could not initialize mmc. error: %d\n",
> > ret);
> > +
> > +             return ret;
> > +     }
> > +
> > +     if (plat->phandlepart.phandle) {
> > +             ofnode node = ofnode_get_by_phandle(plat-
> > >phandlepart.phandle);
> > +
> > +             struct udevice *mmc_dev = NULL;
> > +
> > +             ret = device_get_global_by_ofnode(node, &mmc_dev);
> > +             if (!ret) {
> > +                     struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
> > +
> > +                     ret = mmc_init(mmc);
> > +                     if (ret) {
> > +                             debug("MMC: mmc init failed with
> > error: %d\n",
> > +                                     ret);
> > +
> > +                             return ret;
> > +                     }
> > +             }
> > +     }
> > +#endif
> >       return 0;
> >  };
> >