Document Industrial I/O GPIO trigger support.
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
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.../bindings/iio/trigger/iio-trig-gpio.txt | 26 ++++++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt
diff --git a/Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt b/Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt
new file mode 100644
index 0000000..a8dbf5c
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+Industrial I/O - GPIO based trigger
+
+GPIOs may be used as IIO trigger provider, when trigger is connected to
+GPIO lines.
+
+Required properties:
+- compatible: Should be "iio-gpio-trigger"
+- gpios: Should specify one GPIO line used as trigger source.
+ See Documentation/devicetree/bindings/gpio/gpio.txt
+- #io-trigger-cells: Should be 0, as simple trigger provider.
+ See Documentation/devicetree/bindings/iio/iio-bindings.txt
+
+Optional properties:
+- label: String to specifiy trigger name.
+- gpio-trigger-rising-edge: A rising edge on GPIO will trigger.
+- gpio-trigger-falling-edge: A falling edge on GPIO will trigger.
+ Note: Both rising and falling edge may be used. In case none of
+ rising or falling edge is selected, rising edge is selected by
+ default.
+
+Example:
+ gpiotrig0: iio-gpio-trigger0 {
+ #io-trigger-cells = <0>;
+ compatible = "iio-gpio-trigger";
+ gpios = <&gpioa 11 0>;
+ }
--
1.9.1
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