[PATCH 3/3] doc: board: qualcomm: Document RUBIK Pi 3

[Hongyang Zhao]

Hi Simon,

Thanks for your review.

On 2026-06-17T10:56:10, Hongyang Zhao <hongyang.zhao at thundersoft.com> wrote:
> > doc: board: qualcomm: Document RUBIK Pi 3
> >
> > Add build and flashing instructions for running U-Boot on the
> > Thundercomm RUBIK Pi 3 and include the page in the Qualcomm board
> > documentation index.
> >
> > Signed-off-by: Hongyang Zhao <hongyang.zhao at thundersoft.com>
> >
> > doc/board/qualcomm/index.rst    |  1 +
> >  doc/board/qualcomm/rubikpi3.rst | 51 +++++++++++++++++++++++++++++++++++++++++
> >  2 files changed, 52 insertions(+)
>
> > diff --git a/doc/board/qualcomm/rubikpi3.rst b/doc/board/qualcomm/rubikpi3.rst
> > @@ -0,0 +1,51 @@
> > +Note that fastboot may not be available after replacing the original firmware.
> > +To restore the original firmware, or to install a new version of U-Boot, EDL
> > +mode can be used with the firehose loader binary appropriate for the board.
> > +
> > +A tool like bkerler's edl_ can be used for flashing::
> > +
> > +  $ edl.py --loader /path/to/prog_firehose_ddr.elf w uefi_a u-boot.mbn
>
> Please can you describe how to enter EDL mode on this board? The
> rb3gen2 page points the reader at the Qualcomm Linux documentation -
> without similar guidance here, a user who bricks the board has no
> obvious recovery path.
>

Got it. I’ll add instructions for entering EDL mode in v2.

> > diff --git a/doc/board/qualcomm/rubikpi3.rst b/doc/board/qualcomm/rubikpi3.rst
> > @@ -0,0 +1,51 @@
> > +First, set up `CROSS_COMPILE for aarch64. Then, build U-Boot for
> > +qcs6490_rubikpi3`::
> > +
> > +  $ export CROSS_COMPILE=<aarch64 toolchain prefix>
> > +  $ make qcs6490_rubikpi3_defconfig
>
> Since you are renaming the defconfig in v2, remember to update the
> build instructions and heading reference here to match.

Got it.

--
Thanks and kind regards,
Hongyang