video: Add ADV7123 DT bindings documentation

The ADV7123 is a video DAC described by an input port, an output port,
and an optional power save GPIO.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

diff --git a/Documentation/devicetree/bindings/video/adi,adv7123.txt b/Documentation/devicetree/bindings/video/adi,adv7123.txt
new file mode 100644 (file)
index 0000000..a6b2b2b
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/adi,adv7123.txt
@@ -0,0 +1,50 @@
+Analog Device ADV7123 Video DAC
+-------------------------------
+
+The ADV7123 is a digital-to-analog converter that outputs VGA signals from a
+parallel video input.
+
+Required properties:
+
+- compatible: Should be "adi,adv7123"
+
+Optional properties:
+
+- psave-gpios: Power save control GPIO
+
+Required nodes:
+
+The ADV7123 has two video ports. Their connections are modeled using the OF
+graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+
+- Video port 0 for DPI input
+- Video port 1 for VGA output
+
+
+Example
+-------
+
+       adv7123: encoder@0 {
+               compatible = "adi,adv7123";
+
+               ports {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       port@0 {
+                               reg = <0>;
+
+                               adv7123_in: endpoint@0 {
+                                       remote-endpoint = <&dpi_out>;
+                               };
+                       };
+
+                       port@1 {
+                               reg = <1>;
+
+                               adv7123_out: endpoint@0 {
+                                       remote-endpoint = <&vga_connector_in>;
+                               };
+                       };
+               };
+       };