Kernel driver ltc2990 ===================== Supported chips: * Linear Technology LTC2990 Prefix: 'ltc2990' Addresses scanned: - Datasheet: http://www.linear.com/product/ltc2990 Author: - Mike Looijmans <mike.looijmans@topic.nl> - Tom Levens <tom.levens@cern.ch> Description ----------- LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor. The chip's inputs can measure 4 voltages, or two inputs together (1+2 and 3+4) can be combined to measure a differential voltage, which is typically used to measure current through a series resistor, or a temperature with an external diode. Usage Notes ----------- This driver does not probe for PMBus devices. You will have to instantiate devices explicitly. Sysfs attributes ---------------- ============= ================================================== in0_input Voltage at Vcc pin in millivolt (range 2.5V to 5V) temp1_input Internal chip temperature in millidegrees Celsius ============= ================================================== A subset of the following attributes are visible, depending on the measurement mode of the chip. ============= ========================================================== in[1-4]_input Voltage at V[1-4] pin in millivolt temp2_input External temperature sensor TR1 in millidegrees Celsius temp3_input External temperature sensor TR2 in millidegrees Celsius curr1_input Current in mA across V1-V2 assuming a 1mOhm sense resistor curr2_input Current in mA across V3-V4 assuming a 1mOhm sense resistor ============= ========================================================== The "curr*_input" measurements actually report the voltage drop across the input pins in microvolts. This is equivalent to the current through a 1mOhm sense resistor. Divide the reported value by the actual sense resistor value in mOhm to get the actual value. |