[PATCH] dt-bindings: mailbox: apple, mailbox: Add power-domains property

[Hector Martin]

This will bind to the PMGR pwrstate nodes that control power/clock
gating to SoC blocks. The mailbox driver doesn't do runtime-pm yet, so
initially this will just keep the domain on permanently.

Signed-off-by: Hector Martin <marcan at marcan.st>
---
 Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
index 2c1704b34e7a..c4255f42e801 100644
--- a/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
+++ b/Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
@@ -56,6 +56,9 @@ properties:
   "#mbox-cells":
     const: 0
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg
-- 
2.33.0