xref: /openbmc/linux/Documentation/devicetree/bindings/hwmon/ina3221.txt (revision 597473720f4dc69749542bfcfed4a927a43d935e)

Texas Instruments INA3221 Device Tree Bindings

1) ina3221 node
  Required properties:
  - compatible: Must be "ti,ina3221"
  - reg: I2C address

  Optional properties:
  - ti,single-shot: This chip has two power modes: single-shot (chip takes one
                    measurement and then shuts itself down) and continuous (
                    chip takes continuous measurements). The continuous mode is
                    more reliable and suitable for hardware monitor type device,
                    but the single-shot mode is more power-friendly and useful
                    for battery-powered device which cares power consumptions
                    while still needs some measurements occasionally.
                    If this property is present, the single-shot mode will be
                    used, instead of the default continuous one for monitoring.

  = The node contains optional child nodes for three channels =
  = Each child node describes the information of input source =

  - #address-cells: Required only if a child node is present. Must be 1.
  - #size-cells: Required only if a child node is present. Must be 0.

2) child nodes
  Required properties:
  - reg: Must be 0, 1 or 2, corresponding to IN1, IN2 or IN3 port of INA3221

  Optional properties:
  - label: Name of the input source
  - shunt-resistor-micro-ohms: Shunt resistor value in micro-Ohm

Example:

ina3221@40 {
	compatible = "ti,ina3221";
	reg = <0x40>;
	#address-cells = <1>;
	#size-cells = <0>;

	input@0 {
		reg = <0x0>;
		status = "disabled";
	};
	input@1 {
		reg = <0x1>;
		shunt-resistor-micro-ohms = <5000>;
	};
	input@2 {
		reg = <0x2>;
		label = "VDD_5V";
		shunt-resistor-micro-ohms = <5000>;
	};
};