Convert the legacy TXT binding for the TWL4030 keypad module
to the modern YAML DT schema format. This adds formal validation
and improves documentation by inheriting from the matrix-keymap schema.

Changes in v2:
Simplified the description field by removing redundant '|'
as it does not affect formatting in this context.

Signed-off-by: Jihed Chaibi <redacted>
---
 .../bindings/input/ti,twl4030-keypad.yaml     | 44 +++++++++++++++++++
 .../bindings/input/twl4030-keypad.txt         | 27 ------------
 2 files changed, 44 insertions(+), 27 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/input/ti,twl4030-keypad.yaml
 delete mode 100644 Documentation/devicetree/bindings/input/twl4030-keypad.txt

diff --git a/Documentation/devicetree/bindings/input/ti,twl4030-keypad.yaml b/Documentation/devicetree/bindings/input/ti,twl4030-keypad.yaml
new file mode 100644
index 000000000..2efc88b89
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/ti,twl4030-keypad.yaml

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/ti,twl4030-keypad.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments TWL4030-family Keypad Controller
+
+maintainers:
+  - Peter Ujfalusi <peter.ujfalusi@gmail.com>
+
+description:
+  TWL4030's Keypad controller is used to interface a SoC with a matrix-type
+  keypad device. The keypad controller supports multiple row and column lines.
+  A key can be placed at each intersection of a unique row and a unique column.
+  The keypad controller can sense a key-press and key-release and report the
+  event using a interrupt to the cpu.
+
+allOf:
+  - $ref: matrix-keymap.yaml#
+
+properties:
+  compatible:
+    const: ti,twl4030-keypad
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - interrupts
+  - keypad,num-rows
+  - keypad,num-columns