[PATCH v3 2/2] Add device tree binding documentation for MAX44009

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This patch adds device tree documentation for the max44009 ambient light sensor.

Signed-off-by: Robert Eshleman <bobbyeshleman@xxxxxxxxx>
---
Changes to v3:
- None

Changes to v2:
- Clean up style

 .../bindings/iio/light/max44009.txt           | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/light/max44009.txt

diff --git a/Documentation/devicetree/bindings/iio/light/max44009.txt b/Documentation/devicetree/bindings/iio/light/max44009.txt
new file mode 100644
index 000000000000..b287d7732e37
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/light/max44009.txt
@@ -0,0 +1,25 @@
+* MAX44009 Ambient Light Sensor
+
+Required properties:
+
+- compatible: should be "maxim,max44009"
+- reg: the I2C address of the device (default is <0x4a>)
+
+Optional properties:
+
+- interrupts: interrupt mapping for GPIO IRQ. Should be configured with
+  IRQ_TYPE_EDGE_FALLING.
+
+Refer to interrupt-controller/interrupts.txt for generic interrupt client
+node bindings.
+
+Example:
+
+max44009: max44009@4a {
+	compatible = "maxim,max44009";
+	reg = <0x4a>;
+
+	interrupt-parent = <&gpio1>;
+	interrupts = <17 IRQ_TYPE_EDGE_FALLING>;
+};
+
-- 
2.20.1




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