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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/iio/dac/dpot-dac.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/iio/dac/dpot-dac.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt b/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt new file mode 100644 index 000000000..fdf47a01b --- /dev/null +++ b/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt @@ -0,0 +1,41 @@ +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 = <®_3v3>; + io-channels = <&dpot 0>; + io-channel-names = "dpot"; + }; |