dt-bindings: media: Document OmniVision OV490 combo driver

Device Tree bindings for the OmniVision OV490 combo sensor driver.

Signed-off-by: Benoit Parrot <bparrot@ti.com>

Documentation/devicetree/bindings/media/i2c/ov490.txt

@@ -0,0 +1,46 @@
+* OmniVision OV490 CSI2 Image Signal Processor (ISP)
+
+The Omnivision OV490 is a Image Signal Processor which is a companion
+processor for the Raw image sensors. This device can process the raw images
+and apply multiple algorithms to correct/transform/enhance the image quality.
+
+It needs programming lot of registers are most of them are written from
+a flash memory. The output is a CSI2 MIPI interface which can work with
+configurable number of lanes.
+
+Required Properties:
+- compatible : "ovti,ov490"
+
+Optional Properties:
+- mux-gpios : A list of gpios with active high/low flags for enabling the sensor.
+         This may contain gpios for power, board muxes, etc. Driver would
+         set all of them as specified by the active high/low flag.
+
+  There are no custom optional properties supported for this device.
+  Although all the CSI2 endpoint properties documented in
+  Documentation/devicetree/bindings/media/video-interfaces.txt are supported.
+
+Example:
+
+	&i2c2 {
+		...
+		...
+		ov490@cam0 {
+			compatible = "ovti,ov490";
+			reg = <0x24>;
+
+			mux-gpios = <&gpio_csi2_adap 0  GPIO_ACTIVE_LOW>,
+				    <&gpio_csi2_adap 1  GPIO_ACTIVE_HIGH>,
+				    <&gpio_csi2_adap 3  GPIO_ACTIVE_HIGH>,
+				    <&gpio_csi2_adap 4  GPIO_ACTIVE_LOW>;
+
+			port {
+				csi2_cam0: endpoint@0 {
+					clock-lanes = <0>;
+					data-lanes = <1 2 3 4>;
+					remote-endpoint = <&csi2_phy0>;
+				};
+			};
+		};
+		...
+	};

MAINTAINERS

@@ -10712,6 +10712,13 @@ T:	git git://linuxtv.org/media_tree.git
 S:	Maintained
 F:	drivers/media/i2c/ov2685.c
 
+OMNIVISION OV490 SENSOR DRIVER
+M:	Benoit Parrot <bparrot@ti.com>
+L:	linux-media@vger.kernel.org
+T:	git git://linuxtv.org/media_tree.git
+S:	Maintained
+F:	Documentation/devicetree/bindings/media/i2c/ov490.txt
+
 OMNIVISION OV5640 SENSOR DRIVER
 M:	Steve Longerbeam <slongerbeam@gmail.com>
 L:	linux-media@vger.kernel.org