1Kernel driver ltc2990 2===================== 3 4Supported chips: 5 * Linear Technology LTC2990 6 Prefix: 'ltc2990' 7 Addresses scanned: - 8 Datasheet: http://www.linear.com/product/ltc2990 9 10Author: Mike Looijmans <mike.looijmans@topic.nl> 11 12 13Description 14----------- 15 16LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor. 17The chip's inputs can measure 4 voltages, or two inputs together (1+2 and 3+4) 18can be combined to measure a differential voltage, which is typically used to 19measure current through a series resistor, or a temperature. 20 21This driver currently uses the 2x differential mode only. In order to support 22other modes, the driver will need to be expanded. 23 24 25Usage Notes 26----------- 27 28This driver does not probe for PMBus devices. You will have to instantiate 29devices explicitly. 30 31 32Sysfs attributes 33---------------- 34 35The "curr*_input" measurements actually report the voltage drop across the 36input pins in microvolts. This is equivalent to the current through a 1mOhm 37sense resistor. Divide the reported value by the actual sense resistor value 38in mOhm to get the actual value. 39 40in0_input Voltage at Vcc pin in millivolt (range 2.5V to 5V) 41temp1_input Internal chip temperature in millidegrees Celcius 42curr1_input Current in mA across v1-v2 assuming a 1mOhm sense resistor. 43curr2_input Current in mA across v3-v4 assuming a 1mOhm sense resistor. 44