Some platforms like Marvell are cache coherent, so allow the
"dma-coherent" property.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
 Documentation/devicetree/bindings/usb/generic-xhci.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/generic-xhci.yaml b/Documentation/devicetree/bindings/usb/generic-xhci.yaml
index 6ceafa4af292..a2b94a138999 100644
--- a/Documentation/devicetree/bindings/usb/generic-xhci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-xhci.yaml
@@ -51,6 +51,8 @@ properties:
       - const: core
       - const: reg
 
+  dma-coherent: true
+
   power-domains:
     maxItems: 1
 
-- 
2.47.2