[PATCH RFC 3/5] drm/i2c: tda998x: Add required properties

[Jean-Francois Moine]

The I2C address of the HDMI subdevice is needed for the driver to be
loaded and initialized at system startup time.

The origin of the video must be indicated by a reverse phandle
according to the media video interface.

Signed-off-by: Jean-Francois Moine <moinejf at free.fr>
---
 Documentation/devicetree/bindings/drm/i2c/tda998x.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
index d7df01c..c9fbb0f 100644
--- a/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
+++ b/Documentation/devicetree/bindings/drm/i2c/tda998x.txt
@@ -3,6 +3,8 @@ Device-Tree bindings for the NXP TDA998x HDMI transmitter
 Required properties;
   - compatible: must be "nxp,tda998x"
 
+  - reg: must be <0x70>
+
 Optional properties:
   - interrupts: interrupt number and trigger type
 	default: polling
@@ -15,6 +17,10 @@ Optional properties:
   - video-ports: 24 bits value which defines how the video controller
 	output is wired to the TDA998x input - default: <0x230145>
 
+Required nodes:
+
+  - port: reference of the video source as described in media/video-interfaces
+
 Example:
 
 	tda998x: hdmi-encoder {
@@ -24,4 +30,10 @@ Example:
 		interrupts = <27 2>;		/* falling edge */
 		pinctrl-0 = <&pmx_camera>;
 		pinctrl-names = "default";
+
+		port {
+			tda998x_0: endpoint at 0 {
+				remote-endpoint = <&lcd0_0>;
+			};
+		};
 	};
-- 
1.9.0