dt-bindings: rng: add binding for BCM74110 RNG

Add a binding for the random number generator used on the BCM74110.

Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: Markus Mayer

Documentation/devicetree/bindings/rng/brcm,bcm74110-rng.yaml

@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rng/brcm,bcm74110-rng.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: BCM74110 Random number generator
+
+description:
+  Random number generator used on the BCM74110.
+
+maintainers:
+  - Markus Mayer <mmayer@broadcom.com>
+  - Florian Fainelli <florian.fainelli@broadcom.com>
+
+properties:
+  compatible:
+    enum:
+      - brcm,bcm74110-rng
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    rng@83ba000 {
+        compatible = "brcm,bcm74110-rng";
+        reg = <0x83ba000 0x14>;
+    };