dt-bindings: watchdog: qcom-wdt: allow interrupts

Both of type of watchdogs described in the binding (the KPSS watchdog
and APSS WDT timer) have interrupts.  Allow interrupts and describe them
for KPSS watchdog to fix warnings like:

  watchdog@17c10000: Unevaluated properties are not allowed ('interrupts' was unexpected)

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: krzk

Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml

@@ -9,9 +9,6 @@ title: Qualcomm Krait Processor Sub-system (KPSS) Watchdog timer
 maintainers:
   - Sai Prakash Ranjan <[email protected]>
 
-allOf:
-  - $ref: watchdog.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -51,11 +48,31 @@ properties:
   clocks:
     maxItems: 1
 
+  interrupts:
+    minItems: 1
+    maxItems: 5
+
 required:
   - compatible
   - reg
   - clocks
 
+allOf:
+  - $ref: watchdog.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,kpss-wdt
+    then:
+      properties:
+        interrupts:
+          minItems: 1
+          items:
+            - description: Bark
+            - description: Bite
+
 unevaluatedProperties: false
 
 examples:
@@ -66,5 +83,6 @@ examples:
       compatible = "qcom,apss-wdt-sm8150", "qcom,kpss-wdt";
       reg = <0x17c10000 0x1000>;
       clocks = <&sleep_clk>;
+      interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>;
       timeout-sec = <10>;
     };