Kernel driver wm831x-hwmon
  ==========================
  
  Supported chips:
    * Wolfson Microelectronics WM831x PMICs
      Prefix: 'wm831x'
      Datasheet:
  	http://www.wolfsonmicro.com/products/WM8310
  	http://www.wolfsonmicro.com/products/WM8311
  	http://www.wolfsonmicro.com/products/WM8312
  
  Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
  
  Description
  -----------
  
  The WM831x series of PMICs include an AUXADC which can be used to
  monitor a range of system operating parameters, including the voltages
  of the major supplies within the system.  Currently the driver provides
  reporting of all the input values but does not provide any alarms.
  
  Voltage Monitoring
  ------------------
  
  Voltages are sampled by a 12 bit ADC.  Voltages in milivolts are 1.465
  times the ADC value.
  
  Temperature Monitoring
  ----------------------
  
  Temperatures are sampled by a 12 bit ADC.  Chip and battery temperatures
  are available.  The chip temperature is calculated as:
  
  	Degrees celsius = (512.18 - data) / 1.0983
  
  while the battery temperature calculation will depend on the NTC
  thermistor component.