[PATCH v2 4/5] dt-bindings: add bindings for polarfire soc system controller

[<conor.dooley@microchip.com>]

From: Conor Dooley <conor.dooley@microchip.com>

Add device tree bindings for the MSS system controller on
the Microchip PolarFire SoC.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../microchip,mpfs_sys_controller.yaml        | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/microchip/microchip,mpfs_sys_controller.yaml

diff --git a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs_sys_controller.yaml b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs_sys_controller.yaml
new file mode 100644
index 000000000000..c22fc203b95c
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs_sys_controller.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/microchip/microchip,mpfs_sys_controller.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Microchip MPFS system controller
+
+maintainers:
+  - Conor Dooley <conor.dooley@microchip.com>
+
+properties:
+  compatible:
+    const: microchip,polarfire-soc-sys-controller
+
+  mbox-names:
+    maxItems: 1
+    description: name of the mailbox controller device node
+
+  mboxes:
+    maxItems: 1
+    description: |
+      phandle and index of the mailbox controller device node. It must be 0 (hardware supports only one channel).
+
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+required:
+  - compatible
+  - mbox-names
+  - "#address-cells"
+  - "#size-cells"
+  - "mboxes"
+
+additionalProperties: false
+
+examples:
+  - |
+    syscontroller: syscontroller {
+      compatible = "microchip,polarfire-soc-sys-controller";
+      #address-cells = <1>;
+      #size-cells = <1>;
+      mbox-names = "mbox-mpfs";
+      mboxes = <&mbox 0>;
+    };
-- 
2.17.1