Add device tree bindings documentation for Maxim MAX11100 single-channel
ADC

Signed-off-by: Jacopo Mondi <jacopo+rene...@jmondi.org>
---
 .../devicetree/bindings/iio/adc/max11100.txt          | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/max11100.txt

diff --git a/Documentation/devicetree/bindings/iio/adc/max11100.txt 
b/Documentation/devicetree/bindings/iio/adc/max11100.txt
new file mode 100644
index 0000000..ad0bc31
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/max11100.txt
@@ -0,0 +1,19 @@
+* Maxim max11100 Analog to Digital Converter (ADC)
+
+Required properties:
+  - compatible: Should be "maxim,max11100"
+  - reg: the adc unit address
+  - vref-supply: phandle to the regulator that provides reference voltage
+
+Optional properties:
+  - spi-max-frequency: SPI maximum frequency
+
+Example:
+
+max11100: adc@0 {
+        compatible = "maxim,max11100";
+        reg = <0>;
+        vref-supply = <&adc0_vref>;
+        spi-max-frequency = <240000>;
+};
+
-- 
2.7.4

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