1Current Sense Shunt 2=================== 3 4When an io-channel measures the voltage over a current sense shunt, 5the interesting measurement is almost always the current through the 6shunt, not the voltage over it. This binding describes such a current 7sense circuit. 8 9Required properties: 10- compatible : "current-sense-shunt" 11- io-channels : Channel node of a voltage io-channel. 12- shunt-resistor-micro-ohms : The shunt resistance in microohms. 13 14Example: 15The system current is measured by measuring the voltage over a 163.3 ohms shunt resistor. 17 18sysi { 19 compatible = "current-sense-shunt"; 20 io-channels = <&tiadc 0>; 21 22 /* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */ 23 shunt-resistor-micro-ohms = <3300000>; 24}; 25 26&i2c { 27 tiadc: adc@48 { 28 compatible = "ti,ads1015"; 29 reg = <0x48>; 30 #io-channel-cells = <1>; 31 32 #address-cells = <1>; 33 #size-cells = <0>; 34 35 channel@0 { /* IN0,IN1 differential */ 36 reg = <0>; 37 ti,gain = <1>; 38 ti,datarate = <4>; 39 }; 40 }; 41}; 42