linux/Documentation/hwmon/wm831x
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   1Kernel driver wm831x-hwmon
   2==========================
   3
   4Supported chips:
   5  * Wolfson Microelectronics WM831x PMICs
   6    Prefix: 'wm831x'
   7    Datasheet:
   8        http://www.wolfsonmicro.com/products/WM8310
   9        http://www.wolfsonmicro.com/products/WM8311
  10        http://www.wolfsonmicro.com/products/WM8312
  11
  12Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
  13
  14Description
  15-----------
  16
  17The WM831x series of PMICs include an AUXADC which can be used to
  18monitor a range of system operating parameters, including the voltages
  19of the major supplies within the system.  Currently the driver provides
  20reporting of all the input values but does not provide any alarms.
  21
  22Voltage Monitoring
  23------------------
  24
  25Voltages are sampled by a 12 bit ADC.  Voltages in millivolts are 1.465
  26times the ADC value.
  27
  28Temperature Monitoring
  29----------------------
  30
  31Temperatures are sampled by a 12 bit ADC.  Chip and battery temperatures
  32are available.  The chip temperature is calculated as:
  33
  34        Degrees celsius = (512.18 - data) / 1.0983
  35
  36while the battery temperature calculation will depend on the NTC
  37thermistor component.
  38
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