[PATCH] dt-bindings: display: renesas, du: Add missing power-domains property

[Geert Uytterhoeven]

"make dtbs_check" complains:

    arch/arm/boot/dts/r8a7779-marzen.dt.yaml: display at fff80000: 'power-domains' does not match any of the regexes: 'pinctrl-[0-9]+'
    arch/arm64/boot/dts/renesas/r8a77970-v3msk.dt.yaml: display at feb00000: 'power-domains' does not match any of the regexes: 'pinctrl-[0-9]+'
    arch/arm64/boot/dts/renesas/r8a77970-eagle.dt.yaml: display at feb00000: 'power-domains' does not match any of the regexes: 'pinctrl-[0-9]+'
    arch/arm64/boot/dts/renesas/r8a77980-condor.dt.yaml: display at feb00000: 'power-domains' does not match any of the regexes: 'pinctrl-[0-9]+'
    arch/arm64/boot/dts/renesas/r8a77980-v3hsk.dt.yaml: display at feb00000: 'power-domains' does not match any of the regexes: 'pinctrl-[0-9]+'

Fix this by documenting the power-domains property.

Fixes: 99d66127fad25ebb ("dt-bindings: display: renesas,du: Convert binding to YAML")
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
 Documentation/devicetree/bindings/display/renesas,du.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/renesas,du.yaml b/Documentation/devicetree/bindings/display/renesas,du.yaml
index e955034da53b86e2..0dad87cdd8735542 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.yaml
+++ b/Documentation/devicetree/bindings/display/renesas,du.yaml
@@ -51,6 +51,9 @@ properties:
   resets: true
   reset-names: true
 
+  power-domains:
+    maxItems: 1
+
   ports:
     $ref: /schemas/graph.yaml#/properties/port
     description: |
-- 
2.25.1