dt-bindings: iio: adc: Add bindings for TI ADS8344 A/DC chips

This adds device tree bindings for the TI ADS8344 A/DC chips.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/Documentation/devicetree/bindings/iio/adc/ti-ads8344.txt b/Documentation/devicetree/bindings/iio/adc/ti-ads8344.txt
new file mode 100644 (file)
index 0000000..e47c375
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+++ b/Documentation/devicetree/bindings/iio/adc/ti-ads8344.txt
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+* Texas Instruments ADS8344 A/DC chip
+
+Required properties:
+ - compatible: Must be "ti,ads8344"
+ - reg: SPI chip select number for the device
+ - vref-supply: phandle to a regulator node that supplies the
+   reference voltage
+
+Recommended properties:
+ - spi-max-frequency: Definition as per
+               Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Example:
+adc@0 {
+       compatible = "ti,ads8344";
+       reg = <0>;
+       vref-supply = <&refin_supply>;
+       spi-max-frequency = <10000000>;
+};