blob: c25211e90bdcf402df41340bb9cf3193b95aa5d6 [file] [log] [blame]
Kernel driver ltc2990
Supported chips:
* Linear Technology LTC2990
Prefix: 'ltc2990'
Addresses scanned: -
Author: Mike Looijmans <>
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.
This driver currently uses the 2x differential mode only. In order to support
other modes, the driver will need to be expanded.
Usage Notes
This driver does not probe for PMBus devices. You will have to instantiate
devices explicitly.
Sysfs attributes
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.
in0_input Voltage at Vcc pin in millivolt (range 2.5V to 5V)
temp1_input Internal chip temperature in millidegrees Celcius
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.