linux/Documentation/misc-devices/ics932s401
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   1Kernel driver ics932s401
   2======================
   3
   4Supported chips:
   5  * IDT ICS932S401
   6    Prefix: 'ics932s401'
   7    Addresses scanned: I2C 0x69
   8    Datasheet: Publicly available at the IDT website
   9
  10Author: Darrick J. Wong
  11
  12Description
  13-----------
  14
  15This driver implements support for the IDT ICS932S401 chip family.
  16
  17This chip has 4 clock outputs--a base clock for the CPU (which is likely
  18multiplied to get the real CPU clock), a system clock, a PCI clock, a USB
  19clock, and a reference clock.  The driver reports selected and actual
  20frequency.  If spread spectrum mode is enabled, the driver also reports by what
  21percent the clock signal is being spread, which should be between 0 and -0.5%.
  22All frequencies are reported in KHz.
  23
  24The ICS932S401 monitors all inputs continuously. The driver will not read
  25the registers more often than once every other second.
  26
  27Special Features
  28----------------
  29
  30The clocks could be reprogrammed to increase system speed.  I will not help you
  31do this, as you risk damaging your system!
  32
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