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72f5de92e   Ira Snyder   hwmon: Add LTC421... 
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  Kernel driver ltc4215
  =====================
  
  Supported chips:
    * Linear Technology LTC4215
      Prefix: 'ltc4215'
      Addresses scanned: 0x44
      Datasheet:
          http://www.linear.com/pc/downloadDocument.do?navId=H0,C1,C1003,C1006,C1163,P17572,D12697
  
  Author: Ira W. Snyder <iws@ovro.caltech.edu>
  
  
  Description
  -----------
  
  The LTC4215 controller allows a board to be safely inserted and removed
  from a live backplane.
  
  
  Usage Notes
  -----------
  
  This driver does not probe for LTC4215 devices, due to the fact that some
2d2a7cff1   Jean Delvare   ltc4215/ltc4245: ... 
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  of the possible addresses are unfriendly to probing. You will have to
  instantiate the devices explicitly.
72f5de92e   Ira Snyder   hwmon: Add LTC421... 
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  Example: the following will load the driver for an LTC4215 at address 0x44
  on I2C bus #0:
2d2a7cff1   Jean Delvare   ltc4215/ltc4245: ... 
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  $ modprobe ltc4215
  $ echo ltc4215 0x44 > /sys/bus/i2c/devices/i2c-0/new_device
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  Sysfs entries
  -------------
  
  The LTC4215 has built-in limits for overvoltage, undervoltage, and
  undercurrent warnings. This makes it very likely that the reference
  circuit will be used.
  
  in1_input		input voltage
  in2_input		output voltage
  
  in1_min_alarm		input undervoltage alarm
  in1_max_alarm		input overvoltage alarm
  
  curr1_input		current
  curr1_max_alarm		overcurrent alarm
  
  power1_input		power usage
  power1_alarm		power bad alarm