[PATCH v4 02/10] dt-bindings: usb: generic-ehci: Document dr_mode property

Document the optional property dr_mode present on both RZ/G2 and
R-Car Gen3 SoCs.

It fixes dtbs_check warning,
'dr_mode' does not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Acked-by: Rob Herring <robh@kernel.org>
---
v3->v4:
  * Added Rob's Acked-by tag.
v2->v3:
  * Dropped RZ/G2L SoC and USBPHY control IP is modelled as reset binding.
v2:
  * New patch
---
 Documentation/devicetree/bindings/usb/generic-ehci.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/generic-ehci.yaml b/Documentation/devicetree/bindings/usb/generic-ehci.yaml
index 8089dc956ba3..f6e5e4abb85b 100644
--- a/Documentation/devicetree/bindings/usb/generic-ehci.yaml
+++ b/Documentation/devicetree/bindings/usb/generic-ehci.yaml

@@ -142,6 +142,11 @@ properties:
   iommus:
     maxItems: 1
 
+  dr_mode:
+    enum:
+      - host
+      - otg
+
 required:
   - compatible
   - reg

-- 
2.17.1