Question about uboot initialisation

[momo aubin]

Hi Simon,

Thanks for your answer.

The script that you are telling it is Env.txt right ?

What is a 'dm tree' ? Please could you provide me more infos about this ?

Thanks for your answer in advance.

On Sat, 27 Aug 2022 at 02:21, Simon Glass <sjg at chromium.org> wrote:

> Hi Aubin,
>
> On Fri, 26 Aug 2022 at 06:41, momo aubin <aubinno at gmail.com> wrote:
> >
> > Dear all,
> >
> >
> > Is there any way that allows us to know that uboot has initialised all
> his
> > peripherals before starting loading kernel ?
> >
> > The goal of this check is to reset the board in case of bad
> initialisation
> > and choose a different uboot .
> >
> > Thanks for your answer in advance.
> > Aubin
>
> If there is a failure then it likely results in an error-return code
> from board_init_f() or board_init_r(). These generally halt U-Boot /
> cause a reboot. But this only covers the peripherals that U-Boot sets
> up early, like serial, clocks, pinctrl, MMC, PCI, etc.
>
> U-Boot typically does not init a peripheral unless it is needed for U-Boot.
>
> While U-Boot is running (e.g. a script) it may start up other
> peripherals (e.g. to read a kernel from USB) and in those cases errors
> can be handled by the script.
>
> You can use 'dm tree' to see what devices have been probed successfully.
>
> Regards,
> Simon
>