[PATCH 1/2] iio: sun4i-lradc: Add binding documentation

[Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>]

Document the bindings for the Allwinner LRADC.

Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
---
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx

 .../devicetree/bindings/iio/adc/sun4i-lradc.txt       | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/sun4i-lradc.txt

diff --git a/Documentation/devicetree/bindings/iio/adc/sun4i-lradc.txt b/Documentation/devicetree/bindings/iio/adc/sun4i-lradc.txt
new file mode 100644
index 000000000000..c75a6067b8a5
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/sun4i-lradc.txt
@@ -0,0 +1,19 @@
+Allwinner sun4i Low Resolution ADC
+----------------------------------
+
+Required properties:
+ - compatible: "allwinner,sun4i-a10-lradc"
+ - reg: mmio address range of the chip
+ - interrupts: interrupt to which the chip is connected
+ - vref-supply: powersupply for the lradc reference voltage
+ - #io-channel-cells = <1>; As ADC has multiple outputs
+
+Example:
+
+	lradc: lradc@01c22800 {
+		compatible = "allwinner,sun4i-a10-lradc";
+		reg = <0x01c22800 0x100>;
+		interrupts = <31>;
+		vref-supply = <&reg_vcc3v0>;
+		#io-channel-cells = <1>;
+	};
-- 
2.8.1

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