[yocto] How to define and build device tree in Yocto?

[Gabriele Zampieri]

Hi,

The easiest way is to add them via patches. You can write a recipe that
patch the Linux tree and put it in your meta layer (usually in
meta-xxx/recipes-kernel/linux). Then you need to tell Yocto to export the
dtb via KERNEL_DEVICETREE variable (
https://www.yoctoproject.org/docs/latest/mega-manual/mega-manual.html#var-KERNEL_DEVICETREE).
I usually put this variable in my machine configuration.

Gabriele

Il giorno dom 5 mag 2019 alle ore 14:04 JH <jupiter.hce at gmail.com> ha
scritto:

> Hi,
>
> I think the device tree blob is build from device tree source, but I
> could not find any dts files in recipe source directory, there are
> many dts files in build directory and there are dtb in build
> directory.
>
> If I have a device tree source, where I should put it and how to
> define the recipe to built it?
>
> Thank you.
>
> Kind regards,
>
> - jupiter
> --
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