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review.evervolv.com / android_kernel_htc_msm8960 / 01c8c57d668d94f1036d9ab11a22aa24ca16a35d / . / Documentation / i2c / busses / i2c-viapro
blob: 22efedf60c872869e5230eb5ccf66c166634e22c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1Kernel driver i2c-viapro
2
3Supported adapters:
4 * VIA Technologies, Inc. VT82C596A/B
5 Datasheet: Sometimes available at the VIA website
6
Jean Delvare5f49ef82005-09-22 21:50:47 +0200[diff] [blame]7 * VIA Technologies, Inc. VT82C686A/B
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8 Datasheet: Sometimes available at the VIA website
9
Rudolf Marekc2433532006-09-03 22:35:21 +0200[diff] [blame]10 * VIA Technologies, Inc. VT8231, VT8233, VT8233A
Jean Delvare87501972005-10-31 18:51:21 +0100[diff] [blame]11 Datasheet: available on request from VIA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]12
Jean Delvare0d227a72008-01-27 18:14:51 +0100[diff] [blame]13 * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251
Rudolf Marekc2433532006-09-03 22:35:21 +0200[diff] [blame]14 Datasheet: available on request and under NDA from VIA
15
Jean Delvareab6a6ed2007-02-13 22:09:02 +0100[diff] [blame]16 * VIA Technologies, Inc. CX700
17 Datasheet: available on request and under NDA from VIA
18
Rudolf Marekb806a712008-10-14 17:30:03 +0200[diff] [blame]19 * VIA Technologies, Inc. VX800/VX820
20 Datasheet: available on http://linux.via.com.tw
21
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]22Authors:
John Anthony Kazos Jrbe2a6082007-05-09 08:50:42 +0200[diff] [blame]23 Kyösti Mälkki <kmalkki@cc.hut.fi>,
Jean Delvaref1183012005-09-22 21:58:41 +0200[diff] [blame]24 Mark D. Studebaker <mdsxyz123@yahoo.com>,
25 Jean Delvare <khali@linux-fr.org>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]26
27Module Parameters
28-----------------
29
30* force: int
31 Forcibly enable the SMBus controller. DANGEROUS!
32* force_addr: int
33 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
34
35Description
36-----------
37
38i2c-viapro is a true SMBus host driver for motherboards with one of the
Jean Delvareaaf7f142005-09-22 22:09:07 +0200[diff] [blame]39supported VIA south bridges.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]40
41Your lspci -n listing must show one of these :
42
Jean Delvareaaf7f142005-09-22 22:09:07 +0200[diff] [blame]43 device 1106:3050 (VT82C596A function 3)
44 device 1106:3051 (VT82C596B function 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]45 device 1106:3057 (VT82C686 function 4)
46 device 1106:3074 (VT8233)
47 device 1106:3147 (VT8233A)
Jean Delvareaaf7f142005-09-22 22:09:07 +0200[diff] [blame]48 device 1106:8235 (VT8231 function 4)
49 device 1106:3177 (VT8235)
50 device 1106:3227 (VT8237R)
Rudolf Marekc2433532006-09-03 22:35:21 +0200[diff] [blame]51 device 1106:3337 (VT8237A)
Jean Delvare0d227a72008-01-27 18:14:51 +0100[diff] [blame]52 device 1106:3372 (VT8237S)
Rudolf Marekc2433532006-09-03 22:35:21 +0200[diff] [blame]53 device 1106:3287 (VT8251)
Jean Delvareab6a6ed2007-02-13 22:09:02 +0100[diff] [blame]54 device 1106:8324 (CX700)
Rudolf Marekb806a712008-10-14 17:30:03 +0200[diff] [blame]55 device 1106:8353 (VX800/VX820)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]56
57If none of these show up, you should look in the BIOS for settings like
58enable ACPI / SMBus or even USB.
Jean Delvaref1183012005-09-22 21:58:41 +0200[diff] [blame]59
60Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
61VT8231), this driver supports I2C block transactions. Such transactions
62are mainly useful to read from and write to EEPROMs.
Jean Delvareab6a6ed2007-02-13 22:09:02 +0100[diff] [blame]63
Rudolf Marekb806a712008-10-14 17:30:03 +0200[diff] [blame]64The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
65this driver doesn't implement it yet.