media: dt-bindings: media: ov5647: Document pwdn-gpios

Document in dt-schema bindings for the ov5647 sensor the optional
'pwdn-gpios' property.
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/devicetree/bindings/media/i2c/ov5647.yaml

@@ -26,6 +26,10 @@ properties:
     description: Reference to the xclk clock.
     maxItems: 1
 
+  pwdn-gpios:
+    description: Reference to the GPIO connected to the pwdn pin. Active high.
+    maxItems: 1
+
   port:
     type: object
     description: |-
@@ -56,6 +60,7 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/gpio/gpio.h>
 
     i2c {
         #address-cells = <1>;
@@ -65,6 +70,7 @@ examples:
             compatible = "ovti,ov5647";
             reg = <0x36>;
             clocks = <&camera_clk>;
+            pwdn-gpios = <&pioE 29 GPIO_ACTIVE_HIGH>;
 
             port {
                 camera_out: endpoint {