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64 lines
1.4 KiB
64 lines
1.4 KiB
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/iio/dac/dpot-dac.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: DAC emulation using a digital potentiometer |
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maintainers: |
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- Peter Rosin <[email protected]> |
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description: | |
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It is assumed that the dpot is used as a voltage divider between the |
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current dpot wiper setting and the maximum resistance of the dpot. The |
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divided voltage is provided by a vref regulator. |
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.------. |
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.-----------. | | |
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| vref |--' .---. |
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| regulator |--. | | |
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'-----------' | | d | |
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| | p | |
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| | o | wiper |
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| | t |<---------+ |
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| | | |
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| '---' dac output voltage |
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| | |
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'------+------------+ |
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properties: |
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compatible: |
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const: dpot-dac |
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vref-supply: |
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description: Regulator supplying the voltage divider. |
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io-channels: |
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maxItems: 1 |
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description: | |
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Channel node of the dpot to be used for the voltage division. |
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io-channel-names: |
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const: dpot |
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"#io-channel-cells": |
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const: 1 |
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required: |
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- compatible |
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- vref-supply |
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- io-channels |
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- io-channel-names |
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additionalProperties: false |
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examples: |
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- | |
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dac { |
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compatible = "dpot-dac"; |
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vref-supply = <®_3v3>; |
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io-channels = <&dpot 0>; |
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io-channel-names = "dpot"; |
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}; |
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...
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