dt-bindings: hwmon/pmbus: Add Infineon XDP720

Add documentation for the device tree binding of the XDP720 eFuse.

Signed-off-by: Ashish Yadav <ashish.yadav@infineon.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20260410070154.3313-2-Ashish.Yadav@infineon.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml
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+++ b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,xdp720.yaml
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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/hwmon/pmbus/infineon,xdp720.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Infineon XDP720 Digital eFuse Controller
+
+maintainers:
+  - Ashish Yadav <ashish.yadav@infineon.com>
+
+description: |
+  The XDP720 is an eFuse with integrated current sensor and digital
+  controller. It provides accurate system telemetry (V, I, P, T) and
+  reports analog current at the IMON pin for post-processing.
+
+  Datasheet:
+     https://www.infineon.com/assets/row/public/documents/24/49/infineon-xdp720-001-datasheet-en.pdf
+
+properties:
+  compatible:
+    enum:
+      - infineon,xdp720
+
+  reg:
+    maxItems: 1
+
+  infineon,rimon-micro-ohms:
+    description:
+      The value of the RIMON resistor, in micro ohms, required to enable
+      the system overcurrent protection.
+
+  vdd-vin-supply:
+    description:
+      Supply for the VDD_VIN pin (pin 9), the IC controller power supply.
+      Typically connected to the input bus (VIN) through a 100 ohm / 100 nF
+      RC filter.
+
+required:
+  - compatible
+  - reg
+  - vdd-vin-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        hwmon@11 {
+            compatible = "infineon,xdp720";
+            reg = <0x11>;
+            vdd-vin-supply = <&vdd_vin>;
+            infineon,rimon-micro-ohms = <1098000000>;  /* 1.098k ohm */
+        };
+    };