[U-Boot] [RFC PATCH 3/9] doc: Add driver-model to Sphinx TOC tree

[Bin Meng]

Add index.rst for driver model. More docs will be added later.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---

 doc/driver-model/index.rst |  6 ++++++
 doc/index.rst              | 11 +++++++++++
 2 files changed, 17 insertions(+)
 create mode 100644 doc/driver-model/index.rst

diff --git a/doc/driver-model/index.rst b/doc/driver-model/index.rst
new file mode 100644
index 0000000..c16a544
--- /dev/null
+++ b/doc/driver-model/index.rst
@@ -0,0 +1,6 @@
+============
+Driver Model
+============
+
+.. toctree::
+   :maxdepth: 2
diff --git a/doc/index.rst b/doc/index.rst
index cfcf1dd..835decf 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -15,6 +15,17 @@ if you want to help out.
 .. toctree::
    :maxdepth: 2
 
+Driver-Model documentation
+--------------------------
+The following holds information on the U-Boot device driver framework:
+driver-model, including the design details of itself and several driver
+subsystems.
+
+.. toctree::
+   :maxdepth: 2
+
+   driver-model/index
+
 U-Boot API documentation
 ------------------------
 
-- 
2.7.4