tree ebd398714c12cda56eac400fd7bb67b3dbde77d3
parent 040b69af7209d8fe0742352f4a72719df8dda9a5
author Simon Glass <sjg@chromium.org> 1422199618 -0700
committer Simon Glass <sjg@chromium.org> 1422576594 -0700

dm: core: Set device tree node for root device

The root device corresponds to the root device tree node, so set this up.
Also add a few notes to the documentation.

Signed-off-by: Simon Glass <sjg@chromium.org>