[PATCH v3 3/6] dt-bindings: iio: document interrupt trigger support

[Fabrice Gasnier <fabrice.gasnier@st.com>]

Document interrupt trigger that takes a generic interrupt, and
can be used as trigger source for sampling devices such as sensors,
ADCs...

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 .../bindings/iio/trigger/iio-trig-interrupt.txt    | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/trigger/iio-trig-interrupt.txt

diff --git a/Documentation/devicetree/bindings/iio/trigger/iio-trig-interrupt.txt b/Documentation/devicetree/bindings/iio/trigger/iio-trig-interrupt.txt
new file mode 100644
index 0000000..9de9856
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/trigger/iio-trig-interrupt.txt
@@ -0,0 +1,22 @@
+Interrupt based trigger
+
+Any internal or external interrupt may be used as trigger source for
+devices like sensors, ADCs... As an example, external signal can be
+routed to a GPIO, and turned into an interrupt driven trigger.
+
+Required properties:
+- compatible: Should be "interrupt-trigger"
+- interrupts: The interrupt used as trigger. Generic interrupt client node as
+  described in ../../interrupt-controller/interrupts.txt
+
+Optional properties:
+- #io-trigger-cells = <0>; See the IIO bindings, IIO trigger providers
+  and consumers sections in ../iio-bindings.txt
+
+Example:
+	trig0: interrupt-trigger0 {
+		#io-trigger-cells = <0>;
+		compatible = "interrupt-trigger";
+		interrupts = <11 0>;
+		interrupt-parent = <&gpioa>;
+	}
-- 
1.9.1