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.