dt-bindings: input: ti,nspire-keypad: convert to YAML format

Convert TI-NSPIRE Keypad controller bindings to DT schema.

Signed-off-by: Andrew Davis <[e-mail]>
Reviewed-by: Conor Dooley <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

Documentation/devicetree/bindings/input/ti,nspire-keypad.txt

···
-TI-NSPIRE Keypad
-
-Required properties:
-- compatible: Compatible property value should be "ti,nspire-keypad".
-
-- reg: Physical base address of the peripheral and length of memory mapped
-  region.
-
-- interrupts: The interrupt number for the peripheral.
-
-- scan-interval: How often to scan in us. Based on a APB speed of 33MHz, the
-	maximum and minimum delay time is ~2000us and ~500us respectively
-
-- row-delay: How long to wait before scanning each row.
-
-- clocks: The clock this peripheral is attached to.
-
-- linux,keymap: The keymap to use
-	(see Documentation/devicetree/bindings/input/matrix-keymap.txt)
-
-Optional properties:
-- active-low: Specify that the keypad is active low (i.e. logical low signifies
-	a key press).
-
-Example:
-
-input {
-	compatible = "ti,nspire-keypad";
-	reg = <0x900E0000 0x1000>;
-	interrupts = <16>;
-
-	scan-interval = <1000>;
-	row-delay = <200>;
-
-	clocks = <&apb_pclk>;
-
-	linux,keymap = <
-	0x0000001c	0x0001001c	0x00040039
-	0x0005002c	0x00060015	0x0007000b
-	0x0008000f	0x0100002d	0x01010011
-	0x0102002f	0x01030004	0x01040016
-	0x01050014	0x0106001f	0x01070002
-	0x010a006a	0x02000013	0x02010010
-	0x02020019	0x02030007	0x02040018
-	0x02050031	0x02060032	0x02070005
-	0x02080028	0x0209006c	0x03000026
-	0x03010025	0x03020024	0x0303000a
-	0x03040017	0x03050023	0x03060022
-	0x03070008	0x03080035	0x03090069
-	0x04000021	0x04010012	0x04020020
-	0x0404002e	0x04050030	0x0406001e
-	0x0407000d	0x04080037	0x04090067
-	0x05010038	0x0502000c	0x0503001b
-	0x05040034	0x0505001a	0x05060006
-	0x05080027	0x0509000e	0x050a006f
-	0x0600002b	0x0602004e	0x06030068
-	0x06040003	0x0605006d	0x06060009
-	0x06070001	0x0609000f	0x0708002a
-	0x0709001d	0x070a0033	>;
-};

Documentation/devicetree/bindings/input/ti,nspire-keypad.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/ti,nspire-keypad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI-NSPIRE Keypad
+
+maintainers:
+  - Andrew Davis <[e-mail]>
+
+allOf:
+  - $ref: input.yaml#
+  - $ref: matrix-keymap.yaml#
+
+properties:
+  compatible:
+    enum:
+      - ti,nspire-keypad
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  scan-interval:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: How often to scan in us. Based on a APB speed of 33MHz, the
+      maximum and minimum delay time is ~2000us and ~500us respectively
+
+  row-delay:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: How long to wait between scanning each row in us.
+
+  active-low:
+    description: Specify that the keypad is active low.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - scan-interval
+  - row-delay
+  - linux,keymap
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/input/input.h>
+    keypad@900e0000 {
+        compatible = "ti,nspire-keypad";
+        reg = <0x900e0000 0x1000>;
+        interrupts = <16>;
+
+        clocks = <&apb_pclk>;
+
+        scan-interval = <1000>;
+        row-delay = <200>;
+
+        linux,keymap = <
+            MATRIX_KEY(0,  0, KEY_ENTER)
+            MATRIX_KEY(0,  1, KEY_ENTER)
+            MATRIX_KEY(0,  4, KEY_SPACE)
+            MATRIX_KEY(0,  5, KEY_Z)
+            MATRIX_KEY(0,  6, KEY_Y)
+            MATRIX_KEY(0,  7, KEY_0)
+        >;
+    };