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