path: root/Documentation/i2c/busses/i2c-i810
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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/i2c/busses/i2c-i810
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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+Kernel driver i2c-i810
+Supported adapters:
+ * Intel 82810, 82810-DC100, 82810E, and 82815 (GMCH)
+ Frodo Looijaard <frodol@dds.nl>,
+ Philip Edelbrock <phil@netroedge.com>,
+ Kyösti Mälkki <kmalkki@cc.hut.fi>,
+ Ralph Metzler <rjkm@thp.uni-koeln.de>,
+ Mark D. Studebaker <mdsxyz123@yahoo.com>
+Main contact: Mark Studebaker <mdsxyz123@yahoo.com>
+WARNING: If you have an '810' or '815' motherboard, your standard I2C
+temperature sensors are most likely on the 801's I2C bus. You want the
+i2c-i801 driver for those, not this driver.
+Now for the i2c-i810...
+The GMCH chip contains two I2C interfaces.
+The first interface is used for DDC (Data Display Channel) which is a
+serial channel through the VGA monitor connector to a DDC-compliant
+monitor. This interface is defined by the Video Electronics Standards
+Association (VESA). The standards are available for purchase at
+http://www.vesa.org .
+The second interface is a general-purpose I2C bus. It may be connected to a
+TV-out chip such as the BT869 or possibly to a digital flat-panel display.
+Both busses use the i2c-algo-bit driver for 'bit banging'
+and support for specific transactions is provided by i2c-algo-bit.
+If you enable bus testing in i2c-algo-bit (insmod i2c-algo-bit bit_test=1),
+the test may fail; if so, the i2c-i810 driver won't be inserted. However,
+we think this has been fixed.