dt-bindings: display/panel: Add common rotation property

Display panels can be oriented many ways, especially in the embedded
world. The rotation property is a way to describe this orientation.
The counter clockwise direction is chosen because that's what fbdev
and drm use.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/display/panel/panel.txt b/Documentation/devicetree/bindings/display/panel/panel.txt
new file mode 100644 (file)
index 0000000..e2e6867
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/panel.txt
@@ -0,0 +1,4 @@
+Common display properties
+-------------------------
+
+- rotation:    Display rotation in degrees counter clockwise (0,90,180,270)