Kernel driver ltc2990¶
Linear Technology LTC2990
Addresses scanned: -
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.
This driver does not probe for PMBus devices. You will have to instantiate devices explicitly.
|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.