Kernel driver i2c-viapro
Supported adapters:
* VIA Technologies, Inc. VT82C596A/B
Datasheet: Sometimes available at the VIA website
* VIA Technologies, Inc. VT82C686A/B
Datasheet: Sometimes available at the VIA website
* VIA Technologies, Inc. VT8231, VT8233, VT8233A
Datasheet: available on request from VIA
* VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251
Datasheet: available on request and under NDA from VIA
* VIA Technologies, Inc. CX700
Datasheet: available on request and under NDA from VIA
* VIA Technologies, Inc. VX800/VX820
Datasheet: available on http://linux.via.com.tw
* VIA Technologies, Inc. VX855/VX875
Datasheet: available on http://linux.via.com.tw
* VIA Technologies, Inc. VX900
Datasheet: available on http://linux.via.com.tw
Authors:
Kyösti Mälkki <kmalkki@cc.hut.fi>,
Mark D. Studebaker <mdsxyz123@yahoo.com>,
Jean Delvare <khali@linux-fr.org>
Module Parameters
-----------------
* force: int
Forcibly enable the SMBus controller. DANGEROUS!
* force_addr: int
Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
Description
-----------
i2c-viapro is a true SMBus host driver for motherboards with one of the
supported VIA south bridges.
Your lspci -n listing must show one of these :
device 1106:3050 (VT82C596A function 3)
device 1106:3051 (VT82C596B function 3)
device 1106:3057 (VT82C686 function 4)
device 1106:3074 (VT8233)
device 1106:3147 (VT8233A)
device 1106:8235 (VT8231 function 4)
device 1106:3177 (VT8235)
device 1106:3227 (VT8237R)
device 1106:3337 (VT8237A)
device 1106:3372 (VT8237S)
device 1106:3287 (VT8251)
device 1106:8324 (CX700)
device 1106:8353 (VX800/VX820)
device 1106:8409 (VX855/VX875)
device 1106:8410 (VX900)
If none of these show up, you should look in the BIOS for settings like
enable ACPI / SMBus or even USB.
Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
VT8231), this driver supports I2C block transactions. Such transactions
are mainly useful to read from and write to EEPROMs.
The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
this driver doesn't implement it yet.