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diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml
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+++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.yaml
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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/fsl-imx-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX Watchdog Timer (WDT) Controller
+
+maintainers:
+  - Anson Huang <Anson.Huang@nxp.com>
+
+allOf:
+  - $ref: "watchdog.yaml#"
+
+properties:
+  compatible:
+    oneOf:
+      - const: fsl,imx21-wdt
+      - items:
+          - enum:
+              - fsl,imx8mm-wdt
+              - fsl,imx8mn-wdt
+              - fsl,imx8mp-wdt
+              - fsl,imx8mq-wdt
+          - const: fsl,imx21-wdt
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  fsl,ext-reset-output:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: |
+      If present, the watchdog device is configured to assert its
+      external reset (WDOG_B) instead of issuing a software reset.
+
+required:
+  - compatible
+  - interrupts
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/imx6qdl-clock.h>
+
+    watchdog@20bc000 {
+        compatible = "fsl,imx21-wdt";
+        reg = <0x020bc000 0x4000>;
+        interrupts = <0 80 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clks IMX6QDL_CLK_IPG>;
+    };
+
+...