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

[JH]

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