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gerrit-public.fairphone.software / kernel / msm-4.9 / fccd3af57100027e5330079819987aade07631ad / . / Documentation / i2c / busses / i2c-viapro
blob: ab64ce21c25442f68a262c19cf64aa5167bdfdbb [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
Harald Weltea2315912009-06-15 18:01:49 +0200[diff] [blame]22 * VIA Technologies, Inc. VX855/VX875
Jean Delvare01d56a62012-10-05 22:23:53 +0200[diff] [blame]23 Datasheet: available on http://linux.via.com.tw
24
25 * VIA Technologies, Inc. VX900
26 Datasheet: available on http://linux.via.com.tw
Harald Weltea2315912009-06-15 18:01:49 +0200[diff] [blame]27
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]28Authors:
John Anthony Kazos Jrbe2a6082007-05-09 08:50:42 +0200[diff] [blame]29 Kyösti Mälkki <kmalkki@cc.hut.fi>,
Jean Delvaref1183012005-09-22 21:58:41 +0200[diff] [blame]30 Mark D. Studebaker <mdsxyz123@yahoo.com>,
Jean Delvare7c81c602014-01-29 20:40:08 +0100[diff] [blame]31 Jean Delvare <jdelvare@suse.de>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]32
33Module Parameters
34-----------------
35
36* force: int
37 Forcibly enable the SMBus controller. DANGEROUS!
38* force_addr: int
39 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
40
41Description
42-----------
43
44i2c-viapro is a true SMBus host driver for motherboards with one of the
Jean Delvareaaf7f142005-09-22 22:09:07 +0200[diff] [blame]45supported VIA south bridges.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]46
47Your lspci -n listing must show one of these :
48
Jean Delvareaaf7f142005-09-22 22:09:07 +0200[diff] [blame]49 device 1106:3050 (VT82C596A function 3)
50 device 1106:3051 (VT82C596B function 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]51 device 1106:3057 (VT82C686 function 4)
52 device 1106:3074 (VT8233)
53 device 1106:3147 (VT8233A)
Jean Delvareaaf7f142005-09-22 22:09:07 +0200[diff] [blame]54 device 1106:8235 (VT8231 function 4)
55 device 1106:3177 (VT8235)
56 device 1106:3227 (VT8237R)
Rudolf Marekc2433532006-09-03 22:35:21 +0200[diff] [blame]57 device 1106:3337 (VT8237A)
Jean Delvare0d227a72008-01-27 18:14:51 +0100[diff] [blame]58 device 1106:3372 (VT8237S)
Rudolf Marekc2433532006-09-03 22:35:21 +0200[diff] [blame]59 device 1106:3287 (VT8251)
Jean Delvareab6a6ed2007-02-13 22:09:02 +0100[diff] [blame]60 device 1106:8324 (CX700)
Rudolf Marekb806a712008-10-14 17:30:03 +0200[diff] [blame]61 device 1106:8353 (VX800/VX820)
Harald Weltea2315912009-06-15 18:01:49 +0200[diff] [blame]62 device 1106:8409 (VX855/VX875)
Jean Delvare01d56a62012-10-05 22:23:53 +0200[diff] [blame]63 device 1106:8410 (VX900)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]64
65If none of these show up, you should look in the BIOS for settings like
66enable ACPI / SMBus or even USB.
Jean Delvaref1183012005-09-22 21:58:41 +0200[diff] [blame]67
68Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
69VT8231), this driver supports I2C block transactions. Such transactions
70are mainly useful to read from and write to EEPROMs.
Jean Delvareab6a6ed2007-02-13 22:09:02 +0100[diff] [blame]71
Rudolf Marekb806a712008-10-14 17:30:03 +0200[diff] [blame]72The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
73this driver doesn't implement it yet.