[PATCH] x86: spi: Only use the fast SPI peripheral when support

[Simon Glass <sjg@chromium.org>]

HI Bin,

On Wed, 25 Mar 2020 at 01:25, Bin Meng <bmeng.cn@gmail.com> wrote:
>
> Hi Simon,
>
> On Tue, Mar 24, 2020 at 9:45 PM Simon Glass <sjg@chromium.org> wrote:
> >
> > At present we query the memory map on boards which don't support it. Fix
> > this by only doing it on Apollo Lake.
> >
>
> I wonder isn't this check already covered in mrccache_get_region() below:
>
> ret = dm_spi_get_mmap(dev, &map_base, &map_size, &offset);
> if (!ret) {
> entry->base = map_base;
> } else {
> ret = dev_read_u32_array(dev, "memory-map", reg, 2);
> if (ret)
> return log_msg_ret("Cannot find memory map\n", ret);
> entry->base = reg[0];
> }

Yes it is, so long as dm_spi_get_mmap() returns an error, as it does
with my patch.


>
> > This fixes booting on chromebook_link.
> >
> > Signed-off-by: Simon Glass <sjg@chromium.org>
> > Fixes: 92842147c31 ("spi: ich: Add support for get_mmap() method")
> > ---
> >
> >  drivers/spi/ich.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
> > index a9d7715a55..9f8af45242 100644
> > --- a/drivers/spi/ich.c
> > +++ b/drivers/spi/ich.c
> > @@ -637,7 +637,10 @@ static int ich_get_mmap(struct udevice *dev, ulong *map_basep, uint *map_sizep,
> >                         uint *offsetp)
> >  {
> >         struct udevice *bus = dev_get_parent(dev);
> > +       struct ich_spi_platdata *plat = dev_get_platdata(bus);
> >
> > +       if (plat->ich_version != ICHV_APL)
> > +               return -ENOENT;
> >         return ich_get_mmap_bus(bus, map_basep, map_sizep, offsetp);
> >  }
Regards,
Simon