Add devicetree source files as of Linux-3.15-rc2

This adds the Linux dts files to barebox. The dts files are
generated from Ian Campbells device-tree-rebasing.git:

git://xenbits.xen.org/people/ianc/device-tree-rebasing.git

The dts are found in dts/ in the barebox repository and
will be updated from upstream regularly, probably for each upstream
-rc.

To keep the synchronization with upstream easy no changes to
the original files are allowed under dts/. Instead changes to
upstream dts files will be done using overlays in arch/$ARCH/dts/.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 27 insertions, 0 deletions

diff --git a/dts/Bindings/input/matrix-keymap.txt b/dts/Bindings/input/matrix-keymap.txt
new file mode 100644
index 0000000000..c54919fad1
--- /dev/null
+++ b/dts/Bindings/input/matrix-keymap.txt
@@ -0,0 +1,27 @@
+A simple common binding for matrix-connected key boards. Currently targeted at
+defining the keys in the scope of linux key codes since that is a stable and
+standardized interface at this time.
+
+Required properties:
+- linux,keymap: an array of packed 1-cell entries containing the equivalent
+  of row, column and linux key-code. The 32-bit big endian cell is packed
+  as:
+	row << 24 | column << 16 | key-code
+
+Optional properties:
+Properties for the number of rows and columns are optional because some
+drivers will use fixed values for these.
+- keypad,num-rows: Number of row lines connected to the keypad controller.
+- keypad,num-columns: Number of column lines connected to the keypad
+  controller.
+
+Some users of this binding might choose to specify secondary keymaps for
+cases where there is a modifier key such as a Fn key. Proposed names
+for said properties are "linux,fn-keymap" or with another descriptive
+word for the modifier other from "Fn".
+
+Example:
+	linux,keymap = < 0x00030012
+			 0x0102003a >;
+	keypad,num-rows = <2>;
+	keypad,num-columns = <8>;