[PATCH v5 3/8] dt-bindings: mfd: realtek,rtd1xxx: Add interrupt controller child node

[Yu-Chun Lin <eleanor.lin@realtek.com>]

Allow an interrupt controller as a child node by referencing the
rtd1319-intc-iso schema, update additionalProperties to
unevaluatedProperties, and append a usage example.

Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
---
 .../bindings/mfd/realtek,rtd1xxx.yaml         | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/realtek,rtd1xxx.yaml b/Documentation/devicetree/bindings/mfd/realtek,rtd1xxx.yaml
index 717e29c37b36..b21e14df2879 100644
--- a/Documentation/devicetree/bindings/mfd/realtek,rtd1xxx.yaml
+++ b/Documentation/devicetree/bindings/mfd/realtek,rtd1xxx.yaml
@@ -65,6 +65,10 @@ properties:
     const: 1
 
 patternProperties:
+  "^interrupt-controller":
+    $ref: /schemas/interrupt-controller/realtek,rtd1319-intc-iso.yaml
+    unevaluatedProperties: false
+
   '@[0-9a-f]+$':
     type: object
 
@@ -76,3 +80,27 @@ required:
   - reg
 
 additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    syscon@7000 {
+        compatible = "realtek,rtd1625-iso", "syscon", "simple-mfd";
+        reg = <0x7000 0x1000>;
+        ranges = <0x0 0x7000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        interrupt-controller {
+            compatible = "realtek,rtd1625-intc-iso";
+            interrupt-controller;
+            interrupt-parent = <&gic>;
+            interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+                         <GIC_SPI 39 IRQ_TYPE_LEVEL_HIGH>;
+            #address-cells = <0>;
+            #interrupt-cells = <1>;
+        };
+    };
-- 
2.43.0