media: dt-bindings: ov2685: convert to dtschema

Convert the text-based dt-bindings to yaml.

Changes from original txt:
* Take wording for various properties from other yaml bindings, this
  removes e.g. volt amount from schema since it isn't really relevant
  and the datasheet is a better source.
* Don't make reset-gpios a required property since it can be tied to
  DOVDD instead.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
[Sakari Ailus: bump the maxItems for data-lanes to two]
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Documentation/devicetree/bindings/media/i2c/ov2685.txt

-* Omnivision OV2685 MIPI CSI-2 sensor
-
-Required Properties:
-- compatible: shall be "ovti,ov2685"
-- clocks: reference to the xvclk input clock
-- clock-names: shall be "xvclk"
-- avdd-supply: Analog voltage supply, 2.8 volts
-- dovdd-supply: Digital I/O voltage supply, 1.8 volts
-- dvdd-supply: Digital core voltage supply, 1.8 volts
-- reset-gpios: Low active reset gpio
-
-The device node shall contain one 'port' child node with an
-'endpoint' subnode for its digital output video port,
-in accordance with the video interface bindings defined in
-Documentation/devicetree/bindings/media/video-interfaces.txt.
-The endpoint optional property 'data-lanes' shall be "<1>".
-
-Example:
-&i2c7 {
-	ov2685: camera-sensor@3c {
-		compatible = "ovti,ov2685";
-		reg = <0x3c>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&clk_24m_cam>;
-
-		clocks = <&cru SCLK_TESTCLKOUT1>;
-		clock-names = "xvclk";
-
-		avdd-supply = <&pp2800_cam>;
-		dovdd-supply = <&pp1800>;
-		dvdd-supply = <&pp1800>;
-		reset-gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
-
-		port {
-			ucam_out: endpoint {
-				remote-endpoint = <&mipi_in_ucam>;
-				data-lanes = <1>;
-			};
-		};
-	};
-};

Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ovti,ov2685.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: OmniVision OV2685 Image Sensor
+
+maintainers:
+  - Shunqian Zheng <zhengsq@rock-chips.com>
+
+properties:
+  compatible:
+    const: ovti,ov2685
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: XVCLK clock
+
+  clock-names:
+    items:
+      - const: xvclk
+
+  dvdd-supply:
+    description: Digital Domain Power Supply
+
+  avdd-supply:
+    description: Analog Domain Power Supply
+
+  dovdd-supply:
+    description: I/O Domain Power Supply
+
+  reset-gpios:
+    maxItems: 1
+    description: Reset Pin GPIO Control (active low)
+
+  port:
+    description: MIPI CSI-2 transmitter port
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    additionalProperties: false
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          data-lanes:
+            maxItems: 2
+
+        required:
+          - data-lanes
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - dvdd-supply
+  - avdd-supply
+  - dovdd-supply
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rk3399-cru.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ov2685: camera-sensor@3c {
+            compatible = "ovti,ov2685";
+            reg = <0x3c>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&clk_24m_cam>;
+
+            clocks = <&cru SCLK_TESTCLKOUT1>;
+            clock-names = "xvclk";
+
+            avdd-supply = <&pp2800_cam>;
+            dovdd-supply = <&pp1800>;
+            dvdd-supply = <&pp1800>;
+            reset-gpios = <&gpio2 3 GPIO_ACTIVE_LOW>;
+
+            port {
+                ucam_out: endpoint {
+                    remote-endpoint = <&mipi_in_ucam>;
+                    data-lanes = <1>;
+                };
+            };
+        };
+    };
+
+...

MAINTAINERS

@@ -15389,6 +15389,7 @@ M:	Shunqian Zheng <zhengsq@rock-chips.com>
 L:	linux-media@vger.kernel.org
 S:	Maintained
 T:	git git://linuxtv.org/media_tree.git
+F:	Documentation/devicetree/bindings/media/i2c/ovti,ov2685.yaml
 F:	drivers/media/i2c/ov2685.c
 
 OMNIVISION OV2740 SENSOR DRIVER