[PATCH V3 2/2] doc:devicetree: Add AD7949 device tree bindings in documentation

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Description how to invoke ad7949 driver from device tree file.

Signed-off-by: Charles-Antoine Couret <charles-antoine.couret@xxxxxxxxxxxxx>
---
V1 to V3:
* Add prefix vendor
* Improve patch description

 .../devicetree/bindings/iio/adc/ad7949.txt     | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ad7949.txt

diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.txt b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
new file mode 100644
index 000000000000..f1c3af53f5cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
@@ -0,0 +1,18 @@
+* Analog Devices AD7949/AD7682/AD7689
+
+Required properties:
+ - compatible: Should be one of
+	* "adi,ad7949"
+	* "adi,ad7682"
+	* "adi,ad7689"
+ - reg: spi chip select number for the device
+ - vref-supply: The regulator supply for ADC reference voltage
+ - spi-max-frequency: Max SPI frequency to use (< 33000000)
+
+Example:
+adc@0 {
+	compatible = "adi,ad7949";
+	reg = <0>;
+	vref-supply = <&vdd_supply>;
+	spi-max-frequency = <200000>;
+};
-- 
2.19.1




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