[PATCH 4/4] staging: iio: ad9832: add devicetree documentation

[Marcelo Schmitt]

Add a devicetree documentation for the ad9832 direct digital
synthesizer, waveform generator.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt1@xxxxxxxxx>
---
 .../bindings/iio/frequency/ad9832.txt         | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/frequency/ad9832.txt

diff --git a/Documentation/devicetree/bindings/iio/frequency/ad9832.txt b/Documentation/devicetree/bindings/iio/frequency/ad9832.txt
new file mode 100644
index 000000000000..6a35fdff5a48
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/frequency/ad9832.txt
@@ -0,0 +1,26 @@
+Analog Devices AD9832 Direct Digital Synthesizer, Waveform Generator
+
+Data sheet:
+https://www.analog.com/media/en/technical-documentation/data-sheets/AD9832.pdf
+
+Required properties:
+	- compatible : Must be "adi,ad9832"
+	- reg : SPI chip select number for the device
+	- spi-max-frequency = Max SPI frequency to use (< 25000000)
+	- clocks : The clock reference for the DDS output
+	- clock-names : Must be "mclk"
+
+Optional properties:
+	- avdd-supply:  Definition of the regulator used as analog supply
+	- dvdd-supply : Definition of the regulator used as digital supply
+
+Example:
+	adi9832-dds@0 {
+		compatible = "adi,ad9832";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+		clocks = <&ad9832_mclk>;
+		clock-names = "mclk";
+		avdd-suppy = <&avdd>;
+		dvdd-suppy = <&dvdd>;
+	};
-- 
2.20.1