1 Kernel driver i2c-viapro
4 * VIA Technologies, Inc. VT82C596A/B
5 Datasheet: Sometimes available at the VIA website
7 * VIA Technologies, Inc. VT82C686A/B
8 Datasheet: Sometimes available at the VIA website
10 * VIA Technologies, Inc. VT8231, VT8233, VT8233A
11 Datasheet: available on request from VIA
13 * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251
14 Datasheet: available on request and under NDA from VIA
16 * VIA Technologies, Inc. CX700
17 Datasheet: available on request and under NDA from VIA
19 * VIA Technologies, Inc. VX800/VX820
20 Datasheet: available on http://linux.via.com.tw
22 * VIA Technologies, Inc. VX855/VX875
23 Datasheet: Availability unknown
26 Kyösti Mälkki <kmalkki@cc.hut.fi>,
27 Mark D. Studebaker <mdsxyz123@yahoo.com>,
28 Jean Delvare <khali@linux-fr.org>
34 Forcibly enable the SMBus controller. DANGEROUS!
36 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
41 i2c-viapro is a true SMBus host driver for motherboards with one of the
42 supported VIA south bridges.
44 Your lspci -n listing must show one of these :
46 device 1106:3050 (VT82C596A function 3)
47 device 1106:3051 (VT82C596B function 3)
48 device 1106:3057 (VT82C686 function 4)
49 device 1106:3074 (VT8233)
50 device 1106:3147 (VT8233A)
51 device 1106:8235 (VT8231 function 4)
52 device 1106:3177 (VT8235)
53 device 1106:3227 (VT8237R)
54 device 1106:3337 (VT8237A)
55 device 1106:3372 (VT8237S)
56 device 1106:3287 (VT8251)
57 device 1106:8324 (CX700)
58 device 1106:8353 (VX800/VX820)
59 device 1106:8409 (VX855/VX875)
61 If none of these show up, you should look in the BIOS for settings like
62 enable ACPI / SMBus or even USB.
64 Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
65 VT8231), this driver supports I2C block transactions. Such transactions
66 are mainly useful to read from and write to EEPROMs.
68 The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
69 this driver doesn't implement it yet.