Distro Boot instructions with examples

[Mark Kettenis]

> From: Igor Opaniuk <igor.opaniuk at gmail.com>
> Date: Tue, 7 May 2024 16:30:17 +0200
> 
> Hello Antoni,
> 
> On Tue, May 7, 2024 at 4:14 PM Antoni Jankowski
> <antoni.s.jankowski at gmail.com> wrote:
> >
> > Hi,
> >
> > I've recently learned about the Distro Boot feature of u-boot. This sounds
> > interesting, however the official instructions are sparse and examples seem
> > to be non-existent.
> >
> > The platform I'm working with at the moment is a raspberry pi CM4, are
> > there any examples of how to implement this concept? Distro Boot seems to
> > be suitable for updating all the rootfs at once, including what usually is
> > a separate boot partition.
> >
> > Best regards,
> > Antoni
> 
> There is a nice manual from Toradex about Distro Boot integration [1].
> You can also find a bunch of examples of integration of existing boards
> just by grep-ing:
> 
> u-boot.git$ grep -ine "config_distro_bootcmd" -r ./include/configs/
> ./include/configs/pico-imx6ul.h:86:#include <config_distro_bootcmd.h>
> ./include/configs/kp_imx6q_tpc.h:84:#include <config_distro_bootcmd.h>
> ./include/configs/imx8mp_venice.h:21:#include <config_distro_bootcmd.h>
> ./include/configs/stm32f746-disco.h:30:#include <config_distro_bootcmd.h>
> ...
> 
> Hope this helps.
> 
> [1] https://developer.toradex.com/linux-bsp/os-development/boot/distro-boot/

However, "distro boot" is being superseded by "standard boot" in
recent versions of U-Boot and the raspberry pi boards have already
moved on.  See doc/develop/bootstd.rst for some documentation on
"standard boot".