root/lm-sensors/branches/lm-sensors-2.10/doc/busses/i2c-viapro

Revision 5368, 1.9 KB (checked in by khali, 5 years ago)

Add support for the VIA VX800/VX820 SMBus. Backported from Linux 2.6.

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1Kernel driver `i2c-viapro.o'
2
3Status: Stable
4
5Supported adapters:
6  * VIA Technologies, Inc. VT82C596A/B
7    Datasheet: Sometimes available at the VIA website
8
9  * VIA Technologies, Inc. VT82C686A/B
10    Datasheet: Sometimes available at the VIA website
11
12  * VIA Technologies, Inc. VT8231, VT8233, VT8233A, VT8235, VT8237R/A, VT8251
13    Datasheet: available on request and under NDA from VIA
14
15  * VIA Technologies, Inc. CX700
16    Datasheet: available on request and under NDA from VIA
17
18  * VIA Technologies, Inc. VX800/VX820
19    Datasheet: available on http://linux.via.com.tw
20
21Authors:
22        Kyösti Mälkki <kmalkki@cc.hut.fi>
23        Mark D. Studebaker <mdsxyz123@yahoo.com>
24        Jean Delvare <khali@linux-fr.org>
25
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
35
36Description
37-----------
38
39i2c-viapro is a true SMBus host driver for motherboards with one of the
40supported VIA south bridges.
41
42Your /proc/pci or lspci -n listing must show one of these :
43
44 device 1106:3050   (VT82C596A function 3)
45 device 1106:3051   (VT82C596B function 3)
46 device 1106:3057   (VT82C686 function 4)
47 device 1106:3074   (VT8233)
48 device 1106:3147   (VT8233A)
49 device 1106:8235   (VT8231 function 4)
50 device 1106:3177   (VT8235)
51 device 1106:3227   (VT8237R)
52 device 1106:3337   (VT8237A)
53 device 1106:3287   (VT8251)
54 device 1106:8324   (CX700)
55 device 1106:8353   (VX800/VX820)
56
57If none of these show up, you should look in the BIOS for settings like
58enable ACPI / SMBus or even USB.
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.
63
64The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
65this driver doesn't implement it.
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