Documentation: bridge: Add documentation for ps8622 DT properties

Add documentation for DT properties supported by ps8622/ps8625
eDP-LVDS converter.

Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Tested-by: Rahul Sharma <rahul.sharma@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/Documentation/devicetree/bindings/video/bridge/ps8622.txt b/Documentation/devicetree/bindings/video/bridge/ps8622.txt
new file mode 100644 (file)
index 0000000..c989c38
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/bridge/ps8622.txt
@@ -0,0 +1,31 @@
+ps8622-bridge bindings
+
+Required properties:
+       - compatible: "parade,ps8622" or "parade,ps8625"
+       - reg: first i2c address of the bridge
+       - sleep-gpios: OF device-tree gpio specification for PD_ pin.
+       - reset-gpios: OF device-tree gpio specification for RST_ pin.
+
+Optional properties:
+       - lane-count: number of DP lanes to use
+       - use-external-pwm: backlight will be controlled by an external PWM
+       - video interfaces: Device node can contain video interface port
+                           nodes for panel according to [1].
+
+[1]: Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+       lvds-bridge@48 {
+               compatible = "parade,ps8622";
+               reg = <0x48>;
+               sleep-gpios = <&gpc3 6 1 0 0>;
+               reset-gpios = <&gpc3 1 1 0 0>;
+               lane-count = <1>;
+               ports {
+                       port@0 {
+                               bridge_out: endpoint {
+                                       remote-endpoint = <&panel_in>;
+                               };
+                       };
+               };
+       };