[PATCH 2/3] dt-bindings: media: ov772x: Make bus-type mandatory

[Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>]

In order to establish required properties based on the selected
bus type, make the 'bus-type' property mandatory.

Binary compatibility with existing DTB is kept as the driver does not
enforce the property to be present, and shall fall-back to default
parallel bus configuration, which was the only supported bus type, if
the property is not specified.

Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/media/i2c/ov772x.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/ov772x.yaml b/Documentation/devicetree/bindings/media/i2c/ov772x.yaml
index 2b84fefeb4aa..75dad40f70cc 100644
--- a/Documentation/devicetree/bindings/media/i2c/ov772x.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/ov772x.yaml
@@ -47,9 +47,15 @@ properties:
       endpoint:
         type: object
         properties:
+          bus-type:
+            enum: [5, 6]
+
           remote-endpoint:
             description: A phandle to the bus receiver's endpoint node.
 
+        required:
+          - bus-type
+
     additionalProperties: false
 
 required:
@@ -75,6 +81,7 @@ examples:
 
             port {
                 ov772x_0: endpoint {
+                    bus-type = <5>;
                     remote-endpoint = <&vcap1_in0>;
                 };
             };
-- 
2.27.0