dt-bindings: i2c: apple,i2c: Add power-domains property

This will bind to the PMGR pwrstate nodes that control power/clock
gating to SoC blocks. The i2c driver doesn't do runtime-pm yet, so
initially this will just keep the domain on permanently.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Hector Martin <marcan@marcan.st>

diff --git a/Documentation/devicetree/bindings/i2c/apple,i2c.yaml b/Documentation/devicetree/bindings/i2c/apple,i2c.yaml
index 82b9531..47dd6c1 100644 (file)
--- a/Documentation/devicetree/bindings/i2c/apple,i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/apple,i2c.yaml
@@ -40,6 +40,9 @@ properties:
       used. This frequency is generated by dividing the reference clock.
       Allowed values are between ref_clk/(16*4) and ref_clk/(16*255).
 
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg