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 <r...@kernel.org>
Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
 Documentation/devicetree/bindings/display/bridge/tda998x.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/tda998x.txt 
b/Documentation/devicetree/bindings/display/bridge/tda998x.txt
index 24cc2466185a..1a4eaca40d94 100644
--- a/Documentation/devicetree/bindings/display/bridge/tda998x.txt
+++ b/Documentation/devicetree/bindings/display/bridge/tda998x.txt
@@ -27,6 +27,9 @@ Required 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
 
-- 
2.7.4

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