Question about uboot initialisation

[Simon Glass]

Hi Aubin,

On Mon, 29 Aug 2022 at 01:40, momo aubin <aubinno at gmail.com> wrote:
>
> Hi Simon,
> I got what is the 'dm tree' which is a driver model. This command could be done only in uboot stage. but i got the situation in which the initialisation of u-boot has not finished yet as showing in the following picture.
>
>
>  .i would like to know what is wrong in the initialisation ?

Please try to avoid top posting.

I think the best thing is to move to the latest U-Boot. You are about
9 years behind! But as to your question, I am really not sure. If it
is a TI board, you could try asking them?

Regards,
Simon


>
> Best Regard,
> Aubin
>
> On Mon, 29 Aug 2022 at 05:24, momo aubin <aubinno at gmail.com> wrote:
>>
>> 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