xref: /openbmc/linux/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.yaml (revision cdd38c5f1ce4398ec58fec95904b75824daab7b5)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/afe/current-sense-amplifier.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Current Sense Amplifier

maintainers:
  - Peter Rosin <peda@axentia.se>

description: |
  When an io-channel measures the output voltage from a current sense
  amplifier, the interesting measurement is almost always the current
  through the sense resistor, not the voltage output. This binding
  describes such a current sense circuit.

properties:
  compatible:
    const: current-sense-amplifier

  io-channels:
    maxItems: 1
    description: |
      Channel node of a voltage io-channel.

  sense-resistor-micro-ohms:
    description: The sense resistance.

  sense-gain-mult:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: Amplifier gain multiplier. The default is <1>.

  sense-gain-div:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: Amplifier gain divider. The default is <1>.

required:
  - compatible
  - io-channels
  - sense-resistor-micro-ohms

additionalProperties: false

examples:
  - |
    sysi {
        compatible = "current-sense-amplifier";
        io-channels = <&tiadc 0>;

        sense-resistor-micro-ohms = <20000>;
        sense-gain-mult = <50>;
    };
...