similarity index 100%
rename from doc/efi.rst
rename to doc/api/efi.rst
new file mode 100644
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+U-Boot API documentation
+========================
+
+.. toctree::
+ :maxdepth: 2
+
+ efi
+ linker_lists
+ serial
similarity index 100%
rename from doc/linker_lists.rst
rename to doc/api/linker_lists.rst
similarity index 100%
rename from doc/serial.rst
rename to doc/api/serial.rst
@@ -4,8 +4,16 @@
U-Boot Developer Manual
#######################
+U-Boot API documentation
+------------------------
+
+These books get into the details of how specific U-Boot subsystems work
+from the point of view of a U-Boot developer. Much of the information here
+is taken directly from the U-Boot source, with supplemental material added
+as needed (or at least as we managed to add it - probably *not* all that is
+needed).
+
.. toctree::
+ :maxdepth: 2
- efi
- linker_lists
- serial
+ api/index