current-sense-shunt.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/iio/afe/current-sense-shunt.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Current Sense Shunt
    8 
    9 maintainers:
   10   - Peter Rosin <peda@axentia.se>
   11 
   12 description: |
   13   When an io-channel measures the voltage over a current sense shunt,
   14   the interesting measurement is almost always the current through the
   15   shunt, not the voltage over it. This binding describes such a current
   16   sense circuit.
   17 
   18 properties:
   19   compatible:
   20     const: current-sense-shunt
   21 
   22   io-channels:
   23     maxItems: 1
   24     description: |
   25       Channel node of a voltage io-channel.
   26 
   27   "#io-channel-cells":
   28     const: 0
   29 
   30   shunt-resistor-micro-ohms:
   31     description: The shunt resistance.
   32 
   33 required:
   34   - compatible
   35   - io-channels
   36   - shunt-resistor-micro-ohms
   37 
   38 additionalProperties: false
   39 
   40 examples:
   41   - |
   42     i2c {
   43         #address-cells = <1>;
   44         #size-cells = <0>;
   45         tiadc: adc@48 {
   46             compatible = "ti,ads1015";
   47             reg = <0x48>;
   48             #io-channel-cells = <1>;
   49 
   50             #address-cells = <1>;
   51             #size-cells = <0>;
   52 
   53             channel@0 { /* IN0,IN1 differential */
   54                 reg = <0>;
   55                 ti,gain = <1>;
   56                 ti,datarate = <4>;
   57             };
   58         };
   59     };
   60     sysi {
   61         compatible = "current-sense-shunt";
   62         io-channels = <&tiadc 0>;
   63         #io-channel-cells = <0>;
   64 
   65         /* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */
   66         shunt-resistor-micro-ohms = <3300000>;
   67     };
   68 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/iio/afe/current-sense-shunt.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/iio/afe/current-sense-shunt.yaml