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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/arm-smc-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Secure Monitor Call based watchdog
+
+allOf:
+ - $ref: watchdog.yaml#
+
+maintainers:
+ - Julius Werner <jwerner@chromium.org>
+
+properties:
+ compatible:
+ enum:
+ - arm,smc-wdt
+
+ arm,smc-id:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ The ATF smc function id used by the firmware.
+ Defaults to 0x82003D06 if unset.
+
+required:
+ - compatible
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ watchdog {
+ compatible = "arm,smc-wdt";
+ arm,smc-id = <0x82003D06>;
+ timeout-sec = <15>;
+ };
+
+...