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

Convert TI-NSPIRE Keypad controller bindings to DT schema.

Signed-off-by: Andrew Davis <afd@ti.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240612150711.26706-1-afd@ti.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: glneo

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

@@ -0,0 +1,74 @@
+# 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 <afd@ti.com>
+
+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)
+        >;
+    };