dt-bindings: tda998x: add the calibration gpio

Add the optional calibration gpio for integrated TDA9950 CEC support.
This GPIO corresponds with the interrupt from the TDA998x, as the
calibration requires driving the interrupt pin low.

Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

diff --git a/Documentation/devicetree/bindings/display/bridge/tda998x.txt b/Documentation/devicetree/bindings/display/bridge/tda998x.txt
index 24cc2466185a490067157b0b923a1fde69432649..1a4eaca40d941e60835accac50d23a6d5f43e054 100644 (file)
--- a/Documentation/devicetree/bindings/display/bridge/tda998x.txt
+++ b/Documentation/devicetree/bindings/display/bridge/tda998x.txt
@@ -27,6 +27,9 @@ Optional properties:
        in question is used. The implementation allows one or two DAIs. If two
        DAIs are defined, they must be of different type.
 
+  - nxp,calib-gpios: calibration GPIO, which must correspond with the
+       gpio used for the TDA998x interrupt pin.
+
 [1] Documentation/sound/alsa/soc/DAI.txt
 [2] include/dt-bindings/display/tda998x.h