[U-Boot] [PATCH 1/1] rockchip: provide installation instruction for Firefly-RK3399.

[Mark Kettenis]

> From: Simon Glass <sjg at chromium.org>
> Date: Sun, 8 Oct 2017 22:41:50 -0600
> 
> On 27 September 2017 at 21:35, Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
> > Unfortunately installing U-Boot on an SD card for the Firefly-RK3399
> > is not trivial.
> >
> > I could not get U-Boot running with SPL.  So I ended up using the
> > Rockchip miniloader.
> >
> > Adding a README hopefully will give other users an easier start.
> >
> > Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> > ---
> >  board/rockchip/firefly_rk3399/README | 55 ++++++++++++++++++++++++++++++++++++
> >  1 file changed, 55 insertions(+)
> >  create mode 100644 board/rockchip/firefly_rk3399/README
> 
> Reviewed-by: Simon Glass <sjg at chromium.org>

Hmm,

Do we really want to push people in this direction, using propriatary,
closed-source binaries?

The "pure" U-Boot approach that is currently documented works just
fine.  The only problem is that the firefly-rk3399 by default boots
from eMMC.  And the first-stage bootloader only recognizes SD-cards
with the propriatary loader.  So the trick is to wipe the firmware
stored in eMMC or replace it with U-Boot.