[PATCH v2 06/10] dt-bindings: power: renesas,r8a78000-mdlc: Add firmware property

Add a firmware property, for systems where SCMI must be used instead of
direct hardware access.

Signed-off-by: Geert Uytterhoeven <[email protected]>
---
v2:
  - Spin off from "dt-bindings: power: Document Renesas R-Car X5H Module
    Controller".
---
 .../devicetree/bindings/power/renesas,r8a78000-mdlc.yaml   | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/renesas,r8a78000-mdlc.yaml b/Documentation/devicetree/bindings/power/renesas,r8a78000-mdlc.yaml
index 1dba1e1b1c5b52d0..9616f0244415896c 100644
--- a/Documentation/devicetree/bindings/power/renesas,r8a78000-mdlc.yaml
+++ b/Documentation/devicetree/bindings/power/renesas,r8a78000-mdlc.yaml
@@ -43,6 +43,12 @@ properties:
       and thus identical to the second power domain specifier cell.
     const: 1
 
+  firmware:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Reference to the SCMI firmware device node on systems where SCMI must be
+      used instead of direct hardware access.
+
 required:
   - compatible
   - reg
@@ -58,4 +64,5 @@ examples:
             reg = <0xc3060000 0x1000>;
             #power-domain-cells = <2>;
             #reset-cells = <1>;
+            firmware = <&scmi>;
     };
-- 
2.43.0