Documentation/i2c/busses/i2c-i810

   1 Kernel driver i2c-i810
   2
   3 Supported adapters:
   4   * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH)
   5
   6 Authors:
   7         Frodo Looijaard <frodol@dds.nl>,
   8         Philip Edelbrock <phil@netroedge.com>,
   9         Kyösti Mälkki <kmalkki@cc.hut.fi>,
  10         Ralph Metzler <rjkm@thp.uni-koeln.de>,
  11         Mark D. Studebaker <mdsxyz123@yahoo.com>
  12
  13 Main contact: Mark Studebaker <mdsxyz123@yahoo.com>
  14
  15 Description
  16 -----------
  17
  18 WARNING: If you have an '810' or '815' motherboard, your standard I2C
  19 temperature sensors are most likely on the 801's I2C bus. You want the
  20 i2c-i801 driver for those, not this driver.
  21
  22 Now for the i2c-i810...
  23
  24 The GMCH chip contains two I2C interfaces.
  25
  26 The first interface is used for DDC (Data Display Channel) which is a
  27 serial channel through the VGA monitor connector to a DDC-compliant
  28 monitor. This interface is defined by the Video Electronics Standards
  29 Association (VESA). The standards are available for purchase at
  30 http://www.vesa.org .
  31
  32 The second interface is a general-purpose I2C bus. It may be connected to a
  33 TV-out chip such as the BT869 or possibly to a digital flat-panel display.
  34
  35 Features
  36 --------
  37
  38 Both busses use the i2c-algo-bit driver for 'bit banging'
  39 and support for specific transactions is provided by i2c-algo-bit.
  40
  41 Issues
  42 ------
  43
  44 If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1),
  45 the test may fail; if so, the i2c-i810 driver won't be inserted. However,
  46 we think this has been fixed.