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usr / src / sys / contrib / device-tree / Bindings / iio / dac /

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📄 ad5592r.txt(4.06 KB)
📄 ad5755.txt(2.8 KB)
📄 ad5758.txt(2.54 KB)
📄 ad7303.txt(705 B)
📄 adi,ad5770r.yaml(4.77 KB)
📄 dpot-dac.txt(1.11 KB)
📄 ds4424.txt(536 B)
📄 lltc,ltc1660.yaml(1.11 KB)
📄 lpc1850-dac.txt(563 B)
📄 ltc2632.txt(1.19 KB)
📄 max5821.txt(294 B)
📄 mcp4725.txt(1.21 KB)
📄 st,stm32-dac.yaml(2.21 KB)
📄 ti,dac5571.txt(462 B)
📄 ti,dac7311.txt(471 B)
📄 ti,dac7512.txt(403 B)
📄 ti,dac7612.txt(842 B)
📄 ti-dac082s085.txt(884 B)
📄 vf610-dac.txt(643 B)

Editing: dpot-dac.txt

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";
	};

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Editing: dpot-dac.txt

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