iio/dac/dpot-dac.yaml

1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/dac/dpot-dac.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: DAC emulation using a digital potentiometer
10   - Peter Rosin <peda@axentia.se>
13   It is assumed that the dpot is used as a voltage divider between the
14   current dpot wiper setting and the maximum resistance of the dpot. The
17                   .------.
18    .-----------.  |      |
19    | vref      |--'    .---.
20    | regulator |--.    |   |
21    '-----------'  |    | d |
24                   |    | t |<---------+
26                   |    '---'       dac output voltage
28                   '------+------------+
32     const: dpot-dac
34   vref-supply:
37   io-channels:
40       Channel node of the dpot to be used for the voltage division.
42   io-channel-names:
43     const: dpot
45   "#io-channel-cells":
49   - compatible
50   - vref-supply
51   - io-channels
52   - io-channel-names
57   - |
58     dac {
59         compatible = "dpot-dac";
60         vref-supply = <&reg_3v3>;
61         io-channels = <&dpot 0>;
62         io-channel-names = "dpot";