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dt-bindings: iio: add vref support to sd modulator
Allow to specify the reference voltage used by the SD modulator. When the SD modulator is defined as an IIO backend, the reference voltage can be used to evaluate scaling information of the IIO device. The reference voltage is not used otherwise. Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20240730084640.1307938-7-olivier.moysan@foss.st.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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@ -24,6 +24,12 @@ properties:
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'#io-channel-cells':
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const: 0
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vref-supply:
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description: Phandle to the vref input analog reference voltage.
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dependencies:
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vref-supply: [ '#io-backend-cells' ]
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required:
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- compatible
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@ -38,6 +44,7 @@ examples:
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// Backend binding example. SD modulator configured as an IIO backend device
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ads1201_0: adc {
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compatible = "sd-modulator";
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vref-supply = <&vdd_adc>;
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#io-backend-cells = <0>;
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};
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