dt-bindings: input: cpcap-pwrbutton: Convert to DT schema

Convert power button devicetree bindings for the Motorola CPCAP MFD from
TXT to YAML format. This patch does not change any functionality; the
bindings remain the same.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260721095654.429346-3-clamor95@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/input/cpcap-pwrbutton.txt

@@ -1,20 +0,0 @@
-Motorola CPCAP on key
-
-This module is part of the CPCAP. For more details about the whole
-chip see Documentation/devicetree/bindings/mfd/motorola-cpcap.txt.
-
-This module provides a simple power button event via an Interrupt.
-
-Required properties:
-- compatible: should be one of the following
-   - "motorola,cpcap-pwrbutton"
-- interrupts: irq specifier for CPCAP's ON IRQ
-
-Example:
-
-&cpcap {
-	cpcap_pwrbutton: pwrbutton {
-		compatible = "motorola,cpcap-pwrbutton";
-		interrupts = <23 IRQ_TYPE_NONE>;
-	};
-};

Documentation/devicetree/bindings/input/motorola,cpcap-pwrbutton.yaml

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/motorola,cpcap-pwrbutton.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Motorola CPCAP PMIC power key
+
+maintainers:
+  - Svyatoslav Ryhel <clamor95@gmail.com>
+
+description:
+  This module is part of the Motorola CPCAP MFD device. For more details
+  see Documentation/devicetree/bindings/mfd/motorola,cpcap.yaml. The
+  power key is represented as a sub-node of the PMIC node on the device
+  tree.
+
+properties:
+  compatible:
+    const: motorola,cpcap-pwrbutton
+
+  interrupts:
+    items:
+      - description: CPCAP's ON interrupt
+
+required:
+  - compatible
+  - interrupts
+
+additionalProperties: false
+
+...