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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/i2c/busses/i2c-i810
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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1Kernel driver i2c-i810
2
3Supported adapters:
4 * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH)
5
6Authors:
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
13Main contact: Mark Studebaker <mdsxyz123@yahoo.com>
14
15Description
16-----------
17
18WARNING: If you have an '810' or '815' motherboard, your standard I2C
19temperature sensors are most likely on the 801's I2C bus. You want the
20i2c-i801 driver for those, not this driver.
21
22Now for the i2c-i810...
23
24The GMCH chip contains two I2C interfaces.
25
26The first interface is used for DDC (Data Display Channel) which is a
27serial channel through the VGA monitor connector to a DDC-compliant
28monitor. This interface is defined by the Video Electronics Standards
29Association (VESA). The standards are available for purchase at
30http://www.vesa.org .
31
32The second interface is a general-purpose I2C bus. It may be connected to a
33TV-out chip such as the BT869 or possibly to a digital flat-panel display.
34
35Features
36--------
37
38Both busses use the i2c-algo-bit driver for 'bit banging'
39and support for specific transactions is provided by i2c-algo-bit.
40
41Issues
42------
43
44If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1),
45the test may fail; if so, the i2c-i810 driver won't be inserted. However,
46we think this has been fixed.