[PATCH v5 2/3] dt-bindings: media: ov772x: Make bus-type mandatory

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In order to establish required properties based on the selected
bus type, make the 'bus-type' property mandatory. As this change
documents an endpoint property, also document the 'remote-endpoint'
one now that the 'endpoint' schema has been expanded.

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.

Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
 .../bindings/media/i2c/ovti,ov772x.yaml          | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/ovti,ov772x.yaml b/Documentation/devicetree/bindings/media/i2c/ovti,ov772x.yaml
index e7e2d31fcc23..b034953b92e9 100644
--- a/Documentation/devicetree/bindings/media/i2c/ovti,ov772x.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/ovti,ov772x.yaml
@@ -41,6 +41,21 @@ properties:
     description: |
       Video output port. See ../video-interfaces.txt.
 
+    properties:
+      endpoint:
+        type: object
+
+        properties:
+          bus-type:
+            enum: [5, 6]
+
+        required:
+          - bus-type
+
+        unevaluatedProperties: false
+
+    additionalProperties: false
+
 required:
   - compatible
   - reg
@@ -65,6 +80,7 @@ examples:
 
             port {
                 ov772x_0: endpoint {
+                    bus-type = <5>;
                     remote-endpoint = <&vcap1_in0>;
                 };
             };
-- 
2.28.0




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