dt-bindings: watchdog: Convert TI OMAP to DT schema

Convert the TI OMAP watchdog binding to DT schema format. The compatible
string list was incomplete. The "reg" and "interrupts" properties were
missing. "ti,hwmods" is also deprecated and not required.

Signed-off-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>

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

@@ -1,15 +0,0 @@
-TI Watchdog Timer (WDT) Controller for OMAP
-
-Required properties:
-- compatible : "ti,omap3-wdt" for OMAP3 or "ti,omap4-wdt" for OMAP4
-- ti,hwmods : Name of the hwmod associated to the WDT
-
-Optional properties:
-- timeout-sec : default watchdog timeout in seconds
-
-Examples:
-
-wdt2: wdt@4a314000 {
-	compatible = "ti,omap4-wdt", "ti,omap3-wdt";
-	ti,hwmods = "wd_timer2";
-};

Documentation/devicetree/bindings/watchdog/ti,omap2-wdt.yaml

@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/ti,omap2-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI OMAP Watchdog Timer Controller
+
+maintainers:
+  - Aaro Koskinen <aaro.koskinen@iki.fi>
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - ti,omap2-wdt
+          - ti,omap3-wdt
+      - items:
+          - enum:
+              - ti,am4372-wdt
+              - ti,omap4-wdt
+              - ti,omap5-wdt
+          - const: ti,omap3-wdt
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  ti,hwmods:
+    description: Name of the hardware module associated with the watchdog.
+    $ref: /schemas/types.yaml#/definitions/string
+    deprecated: true
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog@48314000 {
+        compatible = "ti,omap3-wdt";
+        reg = <0x48314000 0x80>;
+        ti,hwmods = "wd_timer2";
+    };