dt-bindings: watchdog: Convert mpc8xxx-wdt to YAML

Convert mpc83xx-wdt.txt to YAML to enable automatic schema validation.

Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: neuschaefer

Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt

@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/mpc8xxx-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MPC8xxx watchdog timer (For 83xx, 86xx and 8xx)
+
+maintainers:
+  - J. Neuschäfer <j.ne@posteo.net>
+
+properties:
+  compatible:
+    enum:
+      - mpc83xx_wdt       # for an mpc83xx
+      - fsl,mpc8610-wdt   # for an mpc86xx
+      - fsl,mpc823-wdt    # for an mpc8xx
+
+  device_type:
+    const: watchdog
+
+  reg:
+    minItems: 1
+    items:
+      - description: |
+          Base physical address and length of the area hosting the watchdog
+          registers.
+
+          On the 83xx, "Watchdog Timer Registers" area:     <0x200 0x100>
+          On the 86xx, "Watchdog Timer Registers" area:     <0xe4000 0x100>
+          On the 8xx, "General System Interface Unit" area: <0x0 0x10>
+
+      - description: |
+          Additional optional physical address and length (4) of location of
+          the Reset Status Register (called RSTRSCR on the mpc86xx)
+
+          On the 83xx, it is located at offset 0x910
+          On the 86xx, it is located at offset 0xe0094
+          On the 8xx, it is located at offset 0x288
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: watchdog.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    watchdog@0 {
+        compatible = "fsl,mpc823-wdt";
+        reg = <0x0 0x10 0x288 0x4>;
+    };
+
+  - |
+    watchdog@200 {
+        compatible = "mpc83xx_wdt";
+        reg = <0x200 0x100>;
+        device_type = "watchdog";
+    };
+
+...