From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Document the bindings for the cec-gpio module for hardware where the
CEC pin is connected to a GPIO pin.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
Documentation/devicetree/bindings/media/cec-gpio.txt | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/cec-gpio.txt
diff --git a/Documentation/devicetree/bindings/media/cec-gpio.txt b/Documentation/devicetree/bindings/media/cec-gpio.txt
new file mode 100644
index 000000000000..e34a175468e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/cec-gpio.txt
@@ -0,0 +1,16 @@
+* HDMI CEC GPIO-based hardware
+
+Use these bindings for HDMI CEC hardware where the CEC pin is hooked up
+to a pull-up GPIO pin.
+
+Required properties:
+ - compatible: value must be "cec-gpio"
+ - gpio: gpio that the CEC line is connected to
+
+Example for the Raspberry Pi 3 where the CEC line is connected to
+pin 7 aka BCM4 aka GPCLK0 on the GPIO pin header:
+
+cec-gpio {
+ compatible = "cec-gpio";
+ gpio = <&gpio 4 GPIO_ACTIVE_HIGH>;
+};
--
2.13.2
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