Kernel driver nct7904
  ====================
  
  Supported chip:
    * Nuvoton NCT7904D
      Prefix: nct7904
      Addresses: I2C 0x2d, 0x2e
      Datasheet: Publicly available at Nuvoton website
  	http://www.nuvoton.com/
  
  Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>
  
  
  Description
  -----------
  
  The NCT7904D is a hardware monitor supporting up to 20 voltage sensors,
  internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature
  interface, up to 12 fan tachometer inputs, up to 4 fan control channels
  with SmartFan.
  
  
  Sysfs entries
  -------------
  
  Currently, the driver supports only the following features:
  
  in[1-20]_input		Input voltage measurements (mV)
  
  fan[1-12]_input		Fan tachometer measurements (rpm)
  
  temp1_input		Local temperature (1/1000 degree,
  			0.125 degree resolution)
  
  temp[2-9]_input		CPU temperatures (1/1000 degree,
  			0.125 degree resolution)

  pwm[1-4]_enable		R/W, 1/2 for manual or SmartFan mode

  			Setting SmartFan mode is supported only if it has been
  			previously configured by BIOS (or configuration EEPROM)

  pwm[1-4]		R/O in SmartFan mode, R/W in manual control mode

  
  The driver checks sensor control registers and does not export the sensors
  that are not enabled. Anyway, a sensor that is enabled may actually be not
  connected and thus provide zero readings.
  
  
  Limitations
  -----------
  
  The following features are not supported in current version:
  
   - SmartFan control
   - Watchdog
   - GPIO
   - external temperature sensors
   - SMI
   - min/max values
   - many other...