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a5b79d62f   stigge@antcom.de   hwmon: Driver for... 
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  Kernel driver max6639
  =====================
  
  Supported chips:
    * Maxim MAX6639
      Prefix: 'max6639'
      Addresses scanned: I2C 0x2c, 0x2e, 0x2f
      Datasheet: http://pdfserv.maxim-ic.com/en/ds/MAX6639.pdf
  
  Authors:
      He Changqing <hechangqing@semptian.com>
      Roland Stigge <stigge@antcom.de>
  
  Description
  -----------
  
  This driver implements support for the Maxim MAX6639. This chip is a 2-channel
  temperature monitor with dual PWM fan speed controller. It can monitor its own
  temperature and one external diode-connected transistor or two external
  diode-connected transistors.
  
  The following device attributes are implemented via sysfs:
  
  Attribute              R/W  Contents
  ----------------------------------------------------------------------------
  temp1_input            R    Temperature channel 1 input (0..150 C)
  temp2_input            R    Temperature channel 2 input (0..150 C)
  temp1_fault            R    Temperature channel 1 diode fault
  temp2_fault            R    Temperature channel 2 diode fault
  temp1_max              RW   Set THERM temperature for input 1
                              (in C, see datasheet)
  temp2_max              RW   Set THERM temperature for input 2
  temp1_crit             RW   Set ALERT temperature for input 1
  temp2_crit             RW   Set ALERT temperature for input 2
  temp1_emergency        RW   Set OT temperature for input 1
                              (in C, see datasheet)
  temp2_emergency        RW   Set OT temperature for input 2
  pwm1                   RW   Fan 1 target duty cycle (0..255)
  pwm2                   RW   Fan 2 target duty cycle (0..255)
  fan1_input             R    TACH1 fan tachometer input (in RPM)
  fan2_input             R    TACH2 fan tachometer input (in RPM)
  fan1_fault             R    Fan 1 fault
  fan2_fault             R    Fan 2 fault
  temp1_max_alarm        R    Alarm on THERM temperature on channel 1
  temp2_max_alarm        R    Alarm on THERM temperature on channel 2
  temp1_crit_alarm       R    Alarm on ALERT temperature on channel 1
  temp2_crit_alarm       R    Alarm on ALERT temperature on channel 2
  temp1_emergency_alarm  R    Alarm on OT temperature on channel 1
  temp2_emergency_alarm  R    Alarm on OT temperature on channel 2