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:

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.