diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst index 757cce5fb8..5aead5ff21 100644 --- a/documentation/ref-manual/variables.rst +++ b/documentation/ref-manual/variables.rst @@ -2307,6 +2307,18 @@ system and gives an overview of their function and contents. :ref:`kernel-yocto ` class in ``meta/classes`` to see how the variable is used. + :term:`EXTERNAL_KERNEL_DEVICETREE` + When inheriting :ref:`ref-classes-kernel-fitimage` and a + :term:`PREFERRED_PROVIDER` for ``virtual/dtb`` set to ``devicetree``, the + variable :term:`EXTERNAL_KERNEL_DEVICETREE` can be used to specify a + directory containing one or more compiled device tree or device tree + overlays to use. + + Using this variable is only useful when you are using a kernel recipe + inheriting the :ref:`ref-classes-kernel` class, and which doesn't + already set a local version. Therefore, setting this variable has no + impact on ``linux-yocto`` kernels. + :term:`EXTERNAL_TOOLCHAIN` When you intend to use an :ref:`external toolchain `,