Kernel driver f71882fg
  ======================
  
  Supported chips:
    * Fintek F71808E
      Prefix: 'f71808e'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Not public
    * Fintek F71808A
      Prefix: 'f71808a'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Not public
    * Fintek F71858FG
      Prefix: 'f71858fg'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Available from the Fintek website
    * Fintek F71862FG and F71863FG
      Prefix: 'f71862fg'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Available from the Fintek website
    * Fintek F71869F and F71869E
      Prefix: 'f71869'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Available from the Fintek website
    * Fintek F71869A
      Prefix: 'f71869a'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Not public
    * Fintek F71882FG and F71883FG
      Prefix: 'f71882fg'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Available from the Fintek website
    * Fintek F71889FG
      Prefix: 'f71889fg'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Available from the Fintek website
    * Fintek F71889ED
      Prefix: 'f71889ed'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Should become available on the Fintek website soon
    * Fintek F71889A
      Prefix: 'f71889a'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Should become available on the Fintek website soon
    * Fintek F8000
      Prefix: 'f8000'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Not public
    * Fintek F81801U
      Prefix: 'f71889fg'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Not public
      Note: This is the 64-pin variant of the F71889FG, they have the
  	  same device ID and are fully compatible as far as hardware
  	  monitoring is concerned.
    * Fintek F81865F
      Prefix: 'f81865f'
      Addresses scanned: none, address read from Super I/O config space
      Datasheet: Available from the Fintek website
  
  Author: Hans de Goede <hdegoede@redhat.com>
  
  
  Description
  -----------
  
  Fintek F718xx/F8000 Super I/O chips include complete hardware monitoring
  capabilities. They can monitor up to 9 voltages, 4 fans and 3 temperature
  sensors.
  
  These chips also have fan controlling features, using either DC or PWM, in
  three different modes (one manual, two automatic).
  
  The driver assumes that no more than one chip is present, which seems
  reasonable.
  
  
  Monitoring
  ----------
  
  The Voltage, Fan and Temperature Monitoring uses the standard sysfs
  interface as documented in sysfs-interface, without any exceptions.
  
  
  Fan Control
  -----------
  
  Both PWM (pulse-width modulation) and DC fan speed control methods are
  supported. The right one to use depends on external circuitry on the
  motherboard, so the driver assumes that the BIOS set the method
  properly.
  
  Note that the lowest numbered temperature zone trip point corresponds to
  to the border between the highest and one but highest temperature zones, and
  vica versa. So the temperature zone trip points 1-4 (or 1-2) go from high temp
  to low temp! This is how things are implemented in the IC, and the driver
  mimicks this.
  
  There are 2 modes to specify the speed of the fan, PWM duty cycle (or DC
  voltage) mode, where 0-100% duty cycle (0-100% of 12V) is specified. And RPM
  mode where the actual RPM of the fan (as measured) is controlled and the speed
  gets specified as 0-100% of the fan#_full_speed file.
  
  Since both modes work in a 0-100% (mapped to 0-255) scale, there isn't a
  whole lot of a difference when modifying fan control settings. The only
  important difference is that in RPM mode the 0-100% controls the fan speed
  between 0-100% of fan#_full_speed. It is assumed that if the BIOS programs
  RPM mode, it will also set fan#_full_speed properly, if it does not then
  fan control will not work properly, unless you set a sane fan#_full_speed
  value yourself.
  
  Switching between these modes requires re-initializing a whole bunch of
  registers, so the mode which the BIOS has set is kept. The mode is
  printed when loading the driver.
  
  Three different fan control modes are supported; the mode number is written
  to the pwm#_enable file. Note that not all modes are supported on all
  chips, and some modes may only be available in RPM / PWM mode.
  Writing an unsupported mode will result in an invalid parameter error.
  
  * 1: Manual mode
    You ask for a specific PWM duty cycle / DC voltage or a specific % of
    fan#_full_speed by writing to the pwm# file. This mode is only
    available on the F71858FG / F8000 if the fan channel is in RPM mode.
  
  * 2: Normal auto mode
    You can define a number of temperature/fan speed trip points, which % the
    fan should run at at this temp and which temp a fan should follow using the
    standard sysfs interface. The number and type of trip points is chip
    depended, see which files are available in sysfs.
    Fan/PWM channel 3 of the F8000 is always in this mode!
  
  * 3: Thermostat mode (Only available on the F8000 when in duty cycle mode)
    The fan speed is regulated to keep the temp the fan is mapped to between
    temp#_auto_point2_temp and temp#_auto_point3_temp.
  
  All of the automatic modes require that pwm1 corresponds to fan1, pwm2 to
  fan2 and pwm3 to fan3.