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1Kernel driver ltc29902=====================3 4 5Supported chips:6 7 * Linear Technology LTC29908 9 Prefix: 'ltc2990'10 11 Addresses scanned: -12 13 Datasheet: http://www.linear.com/product/ltc299014 15 16 17Author:18 19 - Mike Looijmans <mike.looijmans@topic.nl>20 - Tom Levens <tom.levens@cern.ch>21 22 23Description24-----------25 26LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor.27The chip's inputs can measure 4 voltages, or two inputs together (1+2 and 3+4)28can be combined to measure a differential voltage, which is typically used to29measure current through a series resistor, or a temperature with an external30diode.31 32 33Usage Notes34-----------35 36This driver does not probe for PMBus devices. You will have to instantiate37devices explicitly.38 39 40Sysfs attributes41----------------42 43============= ==================================================44in0_input Voltage at Vcc pin in millivolt (range 2.5V to 5V)45temp1_input Internal chip temperature in millidegrees Celsius46============= ==================================================47 48A subset of the following attributes are visible, depending on the measurement49mode of the chip.50 51============= ==========================================================52in[1-4]_input Voltage at V[1-4] pin in millivolt53temp2_input External temperature sensor TR1 in millidegrees Celsius54temp3_input External temperature sensor TR2 in millidegrees Celsius55curr1_input Current in mA across V1-V2 assuming a 1mOhm sense resistor56curr2_input Current in mA across V3-V4 assuming a 1mOhm sense resistor57============= ==========================================================58 59The "curr*_input" measurements actually report the voltage drop across the60input pins in microvolts. This is equivalent to the current through a 1mOhm61sense resistor. Divide the reported value by the actual sense resistor value62in mOhm to get the actual value.63