[yocto] Where to add U-Boot argements bootargs and bootcmd?

[Gabriele Zampieri]

Hi JH,

wks is the extension used by wic to generate different kind of flashable
(partitioned) images. I never used it, but looking around (
https://www.yoctoproject.org/docs/latest/ref-manual/ref-manual.html#command-bootloader
) I see two relevant arguments:

   - *--append *
   - *--configfile*

Check them in the link above.

Here is an example for --append:
https://github.com/openembedded/openembedded-core/blob/master/scripts/lib/wic/canned-wks/directdisk-multi-rootfs.wks#L22

Digging a bit deeper it seems that you cannot feed a custom config to uboot
via wic (and again, correct me if I'm wrong), but only for extlinux (see:
https://github.com/openembedded/openembedded-core/blob/master/scripts/lib/wic/plugins/source/bootimg-partition.py#L110
)

I do not have time to replicate your environment, so I'm just giving you
suggestions.

Best regards,
Gabriele

Il giorno lun 15 lug 2019 alle ore 14:45 JH <jupiter.hce at gmail.com> ha
scritto:

> Thanks Gabriele and Maciej, I use meta-freescale for imx6. The u-boot
> argements seem defined in wks files such as imx-uboot-mxs.wks,
> imx-uboot-bootpart.wks, not quite sure how to extend or overwrite it.
> Sorry still learning the Yocto.
>
> Thank you.
>
> Kind regards,
>
> - jh
>
> On 7/15/19, Gabriele Zampieri <gabbla.malist at gmail.com> wrote:
> > Yes, thanks Maciej for pointing that out! It may be a good starting point
> > for JH.
> >
> > Gabriele
> >
> > Il giorno lun 15 lug 2019 alle ore 10:29 Maciej Pijanowski <
> > maciej.pijanowski at 3mdeb.com> ha scritto:
> >
> >>
> >> On 15.07.2019 08:45, Gabriele Zampieri wrote:
> >>
> >> Hi,
> >>
> >> as far as I know, there is no mechanism to add custom bootargs and/or
> >> bootcmd to uboot via Yocto (correct me if I'm wrong). I usually patch
> the
> >> upstream uboot to achieve this task.
> >>
> >> I also haven't heard of any standardized way. It may depend on the
> target
> >> hardware
> >> and the BSP layer you are using. Apart from patching the U-Boot, there
> >> also might
> >> be boot.cmd script to modify or the config.txt in case of the RPI, for
> >> example.
> >>
> >>
> >> Best regards,
> >> Gabriele
> >>
> >> Il giorno lun 8 lug 2019 alle ore 22:43 JH <jupiter.hce at gmail.com> ha
> >> scritto:
> >>
> >>> Hi,
> >>>
> >>> Which Yocto files and which statement can I add my own U-Boot bootargs
> >>> and bootcmd?
> >>>
> >>> Thank you.
> >>>
> >>> - jupiter
> >>> --
> >>> _______________________________________________
> >>> yocto mailing list
> >>> yocto at yoctoproject.org
> >>> https://lists.yoctoproject.org/listinfo/yocto
> >>>
> >>
> >> --
> >> Maciej Pijanowski
> >> Embedded Systems Engineerhttps://3mdeb.com | @3mdeb_com
> >>
> >> --
> >> _______________________________________________
> >> yocto mailing list
> >> yocto at yoctoproject.org
> >> https://lists.yoctoproject.org/listinfo/yocto
> >>
> >
>
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