Kernel driver ads7828
  =====================
  
  Supported chips:
    * Texas Instruments/Burr-Brown ADS7828
      Prefix: 'ads7828'
      Addresses scanned: I2C 0x48, 0x49, 0x4a, 0x4b
      Datasheet: Publicly available at the Texas Instruments website :
                 http://focus.ti.com/lit/ds/symlink/ads7828.pdf
  
  Authors:

          Steve Hardy <shardy@redhat.com>

  
  Module Parameters
  -----------------
  
  * se_input: bool (default Y)
    Single ended operation - set to N for differential mode
  * int_vref: bool (default Y)
    Operate with the internal 2.5V reference - set to N for external reference
  * vref_mv: int (default 2500)
    If using an external reference, set this to the reference voltage in mV
  
  Description
  -----------
  
  This driver implements support for the Texas Instruments ADS7828.
  
  This device is a 12-bit 8-channel A-D converter.
  
  It can operate in single ended mode (8 +ve inputs) or in differential mode,
  where 4 differential pairs can be measured.
  
  The chip also has the facility to use an external voltage reference.  This
  may be required if your hardware supplies the ADS7828 from a 5V supply, see
  the datasheet for more details.