Hi Momo, On Sun, 11 Sept 2022 at 08:29, momo aubin <[email protected]> wrote: > > Hi Simon, > > Thanks for getting back to me. > > How can I avoid top posting ? i'm a new
You can do a web search for "top posting" which explains the issue better than I can. > > How uboot know that the kernel has started ? Generally it does not. U-Boot's job is typically over once it jumps to the kernel. > If the system is blocked during the u-boot stage, is it possible to restart > all the systems ? > It is possible to put a timer in the u-boot stage in case of the kernel has > not started , can the system reboot by choosing another u-boot ? You can use a watchdog timer to reboot the system. It can be set up in U-Boot, then it Linux does not kick it in time, it will cause a reboot. To choose another U-Boot, you would need to do some scripting, or use mender. There is some work on VBE going on (U-Boot standard boot) but it will take a while to all land. Regards, SImon > > > Thanks for your answer in advance. > Aubin > > > On Tue, 30 Aug 2022 at 04:30, Simon Glass <[email protected]> wrote: >> >> Hi Aubin, >> >> On Mon, 29 Aug 2022 at 01:40, momo aubin <[email protected]> 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 <[email protected]> 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 <[email protected]> wrote: >> >>> >> >>> Hi Aubin, >> >>> >> >>> On Fri, 26 Aug 2022 at 06:41, momo aubin <[email protected]> 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
