Kernel-4.18.0-80.el8_current-sense-shunt

Current Sense Shunt

When an io-channel measures the voltage over a current sense shunt,
the interesting measurement is almost always the current through the
shunt, not the voltage over it. This binding describes such a current
sense circuit.

Required properties:

• compatible : “current-sense-shunt”
• io-channels : Channel node of a voltage io-channel.
• shunt-resistor-micro-ohms : The shunt resistance in microohms.

Example:
The system current is measured by measuring the voltage over a
3.3 ohms shunt resistor.

sysi {
compatible = “current-sense-shunt”;
io-channels = <&tiadc 0>;

/* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */
shunt-resistor-micro-ohms = <3300000>;

};

&i2c {
tiadc: adc@48 {
compatible = “ti,ads1015”;
reg = <0x48>;
#io-channel-cells = <1>;

    #address-cells = <1>;
    #size-cells = <0>;

    channel@0 { /* IN0,IN1 differential */
        reg = <0>;
        ti,gain = <1>;
        ti,datarate = <4>;
    };
};

};