Kernel driver smsc47m1
  ======================
  
  Supported chips:

    * SMSC LPC47B27x, LPC47M112, LPC47M10x, LPC47M13x, LPC47M14x,
      LPC47M15x and LPC47M192

      Addresses scanned: none, address read from Super I/O config space
      Prefix: 'smsc47m1'
      Datasheets:

          http://www.smsc.com/media/Downloads_Public/Data_Sheets/47b272.pdf
          http://www.smsc.com/media/Downloads_Public/Data_Sheets/47m10x.pdf
          http://www.smsc.com/media/Downloads_Public/Data_Sheets/47m112.pdf
          http://www.smsc.com/

    * SMSC LPC47M292
      Addresses scanned: none, address read from Super I/O config space
      Prefix: 'smsc47m2'
      Datasheet: Not public

    * SMSC LPC47M997
      Addresses scanned: none, address read from Super I/O config space
      Prefix: 'smsc47m1'
      Datasheet: none

  
  Authors:
          Mark D. Studebaker <mdsxyz123@yahoo.com>,
          With assistance from Bruce Allen <ballen@uwm.edu>, and his
          fan.c program: http://www.lsc-group.phys.uwm.edu/%7Eballen/driver/
          Gabriele Gorla <gorlik@yahoo.com>,
          Jean Delvare <khali@linux-fr.org>
  
  Description
  -----------
  
  The Standard Microsystems Corporation (SMSC) 47M1xx Super I/O chips
  contain monitoring and PWM control circuitry for two fans.

  The LPC47M15x, LPC47M192 and LPC47M292 chips contain a full 'hardware
  monitoring block' in addition to the fan monitoring and control. The
  hardware monitoring block is not supported by this driver, use the
  smsc47m192 driver for that.

  No documentation is available for the 47M997, but it has the same device
  ID as the 47M15x and 47M192 chips and seems to be compatible.

  Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
  triggered if the rotation speed has dropped below a programmable limit. Fan
  readings can be divided by a programmable divider (1, 2, 4 or 8) to give
  the readings more range or accuracy. Not all RPM values can accurately be
  represented, so some rounding is done. With a divider of 2, the lowest
  representable value is around 2600 RPM.
  
  PWM values are from 0 to 255.
  
  If an alarm triggers, it will remain triggered until the hardware register
  is read at least once. This means that the cause for the alarm may
  already have disappeared! Note that in the current implementation, all
  hardware registers are read whenever any data is read (unless it is less
  than 1.5 seconds since the last update). This means that you can easily
  miss once-only alarms.
  
  
  **********************
  The lm_sensors project gratefully acknowledges the support of
  Intel in the development of this driver.