dt-bindings: input: Convert matrix-keymap to json-schema

Convert the matrix-keymap binding to DT schema format using json-schema
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1592285467-18371-1-git-send-email-Anson.Huang@nxp.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/input/matrix-keymap.txt

-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>;
+This file has been moved to matrix-keymap.yaml

Documentation/devicetree/bindings/input/matrix-keymap.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/matrix-keymap.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common key matrices binding for matrix-connected key boards
+
+maintainers:
+  - Olof Johansson <olof@lixom.net>
+
+description: |
+  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.
+
+  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".
+
+properties:
+  linux,keymap:
+    $ref: '/schemas/types.yaml#/definitions/uint32-array'
+    description: |
+      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
+
+  keypad,num-rows:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Number of row lines connected to the keypad controller.
+
+  keypad,num-columns:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Number of column lines connected to the keypad controller.
+
+examples:
+  - |
+    keypad {
+        /* ... */
+        linux,keymap = < 0x00030012
+                         0x0102003a >;
+        keypad,num-rows = <2>;
+        keypad,num-columns = <8>;
+    };