Convert the i.MX KEYPAD binding to DT schema format using json-schema

Signed-off-by: Anson Huang <redacted>
---
 .../devicetree/bindings/input/imx-keypad.txt       | 53 -------------
 .../devicetree/bindings/input/imx-keypad.yaml      | 89 ++++++++++++++++++++++
 2 files changed, 89 insertions(+), 53 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/input/imx-keypad.txt
 create mode 100644 Documentation/devicetree/bindings/input/imx-keypad.yaml

diff --git a/Documentation/devicetree/bindings/input/imx-keypad.txt b/Documentation/devicetree/bindings/input/imx-keypad.txt
deleted file mode 100644
index 2ebaf7d..0000000
--- a/Documentation/devicetree/bindings/input/imx-keypad.txt
+++ /dev/null

@@ -1,53 +0,0 @@
-* Freescale i.MX Keypad Port(KPP) device tree bindings
-
-The KPP is designed to interface with a keypad matrix with 2-point contact
-or 3-point contact keys. The KPP is designed to simplify the software task
-of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
-and decoding one or multiple keys pressed simultaneously on a keypad.
-
-Required SoC Specific Properties:
-- compatible: Should be "fsl,<soc>-kpp".
-
-- reg: Physical base address of the KPP and length of memory mapped
-  region.
-
-- interrupts: The KPP interrupt number to the CPU(s).
-
-- clocks: The clock provided by the SoC to the KPP. Some SoCs use dummy
-clock(The clock for the KPP is provided by the SoCs automatically).
-
-Required Board Specific Properties:
-- pinctrl-names: The definition can be found at
-pinctrl/pinctrl-bindings.txt.
-
-- pinctrl-0: The definition can be found at
-pinctrl/pinctrl-bindings.txt.
-
-- linux,keymap: The definition can be found at
-bindings/input/matrix-keymap.txt.
-
-Example:
-kpp: kpp@73f94000 {
-	compatible = "fsl,imx51-kpp", "fsl,imx21-kpp";
-	reg = <0x73f94000 0x4000>;
-	interrupts = <60>;
-	clocks = <&clks 0>;
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_kpp_1>;
-	linux,keymap = <0x00000067	/* KEY_UP */
-			0x0001006c	/* KEY_DOWN */
-			0x00020072	/* KEY_VOLUMEDOWN */
-			0x00030066	/* KEY_HOME */
-			0x0100006a	/* KEY_RIGHT */
-			0x01010069	/* KEY_LEFT */
-			0x0102001c	/* KEY_ENTER */
-			0x01030073	/* KEY_VOLUMEUP */
-			0x02000040	/* KEY_F6 */
-			0x02010042	/* KEY_F8 */
-			0x02020043	/* KEY_F9 */
-			0x02030044	/* KEY_F10 */
-			0x0300003b	/* KEY_F1 */
-			0x0301003c	/* KEY_F2 */
-			0x0302003d	/* KEY_F3 */
-			0x03030074>;	/* KEY_POWER */
-};

diff --git a/Documentation/devicetree/bindings/input/imx-keypad.yaml b/Documentation/devicetree/bindings/input/imx-keypad.yaml
new file mode 100644
index 0000000..a1350cd
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/imx-keypad.yaml

@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/imx-keypad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX Keypad Port(KPP) device tree bindings
+
+maintainers:
+  - Liu Ying <gnuiyl@gmail.com>
+
+description: |
+  The KPP is designed to interface with a keypad matrix with 2-point contact
+  or 3-point contact keys. The KPP is designed to simplify the software task
+  of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
+  and decoding one or multiple keys pressed simultaneously on a keypad.
+
+properties:
+  compatible:
+    oneOf:
+      - const: fsl,imx21-kpp
+      - items:
+          - enum:
+            - fsl,imx25-kpp
+            - fsl,imx27-kpp
+            - fsl,imx31-kpp
+            - fsl,imx35-kpp
+            - fsl,imx51-kpp
+            - fsl,imx53-kpp
+            - fsl,imx50-kpp
+            - fsl,imx6q-kpp
+            - fsl,imx6sx-kpp
+            - fsl,imx6sl-kpp
+            - fsl,imx6sll-kpp
+            - fsl,imx6ul-kpp
+            - fsl,imx7d-kpp
+          - const: fsl,imx21-kpp
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  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