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e738510555
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>
59 lines
1.2 KiB
YAML
59 lines
1.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/adc/sigma-delta-modulator.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Sigma delta modulator
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maintainers:
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- Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
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properties:
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compatible:
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description: |
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"sd-modulator" can be used as a generic SD modulator,
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if the modulator is not specified in the compatible list.
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enum:
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- sd-modulator
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- ads1201
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'#io-backend-cells':
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const: 0
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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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anyOf:
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- required: ['#io-backend-cells']
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- required: ['#io-channel-cells']
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additionalProperties: false
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examples:
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- |
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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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- |
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// Legacy binding example. SD modulator configured as an IIO channel provider
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ads1201_1: adc {
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compatible = "sd-modulator";
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#io-channel-cells = <0>;
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};
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...
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