Documentation/i2c/busses/i2c-i810

   1 Kernel driver i2c-i810
   2
   3 Supported adapters:
   4   * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH)
   5   * Intel 82845G (GMCH)
   6
   7 Authors:
   8         Frodo Looijaard <frodol@dds.nl>,
   9         Philip Edelbrock <phil@netroedge.com>,
  10         Kyösti Mälkki <kmalkki@cc.hut.fi>,
  11         Ralph Metzler <rjkm@thp.uni-koeln.de>,
  12         Mark D. Studebaker <mdsxyz123@yahoo.com>
  13
  14 Main contact: Mark Studebaker <mdsxyz123@yahoo.com>
  15
  16 Description
  17 -----------
  18
  19 WARNING: If you have an '810' or '815' motherboard, your standard I2C
  20 temperature sensors are most likely on the 801's I2C bus. You want the
  21 i2c-i801 driver for those, not this driver.
  22
  23 Now for the i2c-i810...
  24
  25 The GMCH chip contains two I2C interfaces.
  26
  27 The first interface is used for DDC (Data Display Channel) which is a
  28 serial channel through the VGA monitor connector to a DDC-compliant
  29 monitor. This interface is defined by the Video Electronics Standards
  30 Association (VESA). The standards are available for purchase at
  31 http://www.vesa.org .
  32
  33 The second interface is a general-purpose I2C bus. It may be connected to a
  34 TV-out chip such as the BT869 or possibly to a digital flat-panel display.
  35
  36 Features
  37 --------
  38
  39 Both busses use the i2c-algo-bit driver for 'bit banging'
  40 and support for specific transactions is provided by i2c-algo-bit.
  41
  42 Issues
  43 ------
  44
  45 If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1),
  46 the test may fail; if so, the i2c-i810 driver won't be inserted. However,
  47 we think this has been fixed.