docs: dt: add an index.rst file for devicetree
There are some device tree documentation under
Documentation/devicetree. Add a top index file for it and
add the already-existing ReST file on it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/index.rst b/Documentation/devicetree/index.rst
new file mode 100644
index 0000000..a11efe2
--- /dev/null
+++ b/Documentation/devicetree/index.rst
@@ -0,0 +1,10 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=============================
+Open Firmware and Device Tree
+=============================
+
+.. toctree::
+ :maxdepth: 1
+
+ writing-schema