i.MX ProcessorsのトピックRe: Howto re-build dtb with bitbake cmd

Howto re-build dtb with bitbake cmd

floriankoenig — Wed, 18 Oct 2017 13:20:55 GMT

hi,

i builded a complete image, but now i want to change some properties in the device tree file (dts) and simply just want to rebuild the dts file into a dtb.

I saw on net, that "bitbake my-own-linux -f -c deploy" should do the trick. But when i look at the date of the dtb-file in the build/arch/arm/boot/dts/ directory. it is not re-build ?

When i look at poky/meta/recipes-kernel/linux/linux-dtb.inc it seemed that the do_compile_append task is building the dtb with "oe_runmake ${DTB}" , but i think it is only callable with bitbake when i run "bitbake my-own-linux -c do_compile" , is that correct ?

Is there any way to re-build only the dtb with bitbake commands to have a consistent workflow ?

thanks

Re: Howto re-build dtb with bitbake cmd

Carlos_Musich — Tue, 24 Oct 2017 00:46:04 GMT

Hi Florian,

it is not necessary to use bitbake. You can just go to your kernel-source folder and execute

make imx_v7_defconfig

make file_name.dtb

and the new .dtb will be located at kernel-source/arch/arm/boot/dts/ directory.

Regards,
Carlos

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: Howto re-build dtb with bitbake cmd

abhijeet_ghodga — Fri, 16 Aug 2019 06:01:43 GMT

What about the .dtb files generated in the deploy folder in /tmp directory? Do we have to delete those files or they get overwritten? Also how to find which .dts files are relevant as there are many made in the /kernel-source/arch/arm/boot/dts directory?

Re: Howto re-build dtb with bitbake cmd

Zater — Fri, 23 Feb 2024 14:37:59 GMT

Hello Mr. ghodga

did you find how to assign the desired .dts file to bitbake to be build ?

Re: Howto re-build dtb with bitbake cmd

Naveenkumar_Muthusamy — Thu, 09 May 2024 05:11:48 GMT

Hi all,

Below commands may work:

bitbake -c devshell virtual/kernel

make dtbs

Re: Howto re-build dtb with bitbake cmd

NunoVilaca — Thu, 09 May 2024 10:25:49 GMT

Where are the built blobs supposed to go? I tried it, it built the blobs, ~~but I can't find them anywhere~~.

Nevermind, I found it on yocto's tmp/work dir. I was expecting them to be on the kernel source dir.

One last note: make dtbs will build all dtbs. You can build just the dtb you want using, make <dtbname>.dtb

Beware you need the .dtb in the end. Also that the base dir is arch/arm/boot/dts, so if you want a dtb inside a sub-dir you must include it in the name:

make freescale/dtbname.dtb

Re: Howto re-build dtb with bitbake cmd

Naveenkumar_Muthusamy — Fri, 10 May 2024 10:20:01 GMT

Hi ,

Thanks for your reply. i have followed your input and it works well.