lineage_kernel_xcoverpro/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt

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Bindings for DAC emulation using a digital potentiometer
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
| |
'------+------------+
Required properties:
- compatible: Should be "dpot-dac"
- vref-supply: The regulator supplying the voltage divider.
- io-channels: Channel node of the dpot to be used for the voltage division.
- io-channel-names: Should be "dpot".
Example:
&i2c {
dpot: mcp4651-503@28 {
compatible = "microchip,mcp4651-503";
reg = <0x28>;
#io-channel-cells = <1>;
};
};
dac {
compatible = "dpot-dac";
vref-supply = <&reg_3v3>;
io-channels = <&dpot 0>;
io-channel-names = "dpot";
};