[PATCH v4 2/5] dt-bindings: add bindings for polarfire soc mailbox

[conor.dooley at microchip.com]

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

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

Signed-off-by: Conor Dooley <conor.dooley at microchip.com>
---
 .../microchip,polarfire-soc-mailbox.yaml      | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/microchip,polarfire-soc-mailbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/microchip,polarfire-soc-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/microchip,polarfire-soc-mailbox.yaml
new file mode 100644
index 000000000000..3df4595ad58a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/microchip,polarfire-soc-mailbox.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/mailbox/microchip,mailbox-mpfs.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Microchip PolarFire SoC (MPFS) MSS (microprocessor subsystem) mailbox controller
+
+maintainers:
+  - Conor Dooley <conor.dooley at microchip.com>
+
+properties:
+  compatible:
+    const: microchip,polarfire-soc-mailbox
+
+  reg:
+    items:
+      - description: mailbox data registers
+      - description: mailbox interrupt registers
+
+  interrupts:
+    maxItems: 1
+
+  "#mbox-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#mbox-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+      mbox: mailbox at 37020000 {
+        compatible = "microchip,polarfire-soc-mailbox";
+        reg = <0x0 0x37020000 0x0 0x1000>, <0x0 0x2000318c 0x0 0x40>;
+        interrupt-parent = <&L1>;
+        interrupts = <96>;
+        #mbox-cells = <1>;
+      };
+    };
-- 
2.17.1