Document the optional binding to limit the possible tv-norms on the
input connectors.

Signed-off-by: Marco Felsch <m.fel...@pengutronix.de>
Reviewed-by: Rob Herring <r...@kernel.org>
---
 Documentation/devicetree/bindings/media/i2c/tvp5150.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/tvp5150.txt 
b/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
index cc98b38c7e73..93731638b509 100644
--- a/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
+++ b/Documentation/devicetree/bindings/media/i2c/tvp5150.txt
@@ -49,6 +49,13 @@ Required Endpoint Properties for parallel synchronization on 
output port:
 Note: Do not specify any of these properties if you want to use the embedded
       BT.656 synchronization.
 
+Optional Connector Properties:
+==============================
+
+- tvnorms: Set the possible signals to which the hardware tries to lock instead
+          of using the autodetection mechnism. Please look at [1] for more
+          information.
+
 [1] 
Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt.
 
 Example - three input sources:
@@ -56,6 +63,7 @@ Example - three input sources:
 comp_connector_0 {
        compatible = "composite-video-connector";
        label = "Composite0";
+       tvnorms = <TVNORM_PAL_M>; /* limit to pal-m signals */
 
        port {
                composite0_to_tvp5150: endpoint {
@@ -67,6 +75,7 @@ comp_connector_0 {
 comp_connector_1 {
        compatible = "composite-video-connector";
        label = "Composite1";
+       tvnorms = <TVNORM_NTSC_M>; /* limit to ntsc-m signals */
 
        port {
                composite1_to_tvp5150: endpoint {
-- 
2.20.1

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