Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / input / matrix-keymap.txt

diff --git a/kernel/Documentation/devicetree/bindings/input/matrix-keymap.txt b/kernel/Documentation/devicetree/bindings/input/matrix-keymap.txt
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+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>;