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1========================2Kernel driver i2c-viapro3========================4 5Supported adapters:6 * VIA Technologies, Inc. VT82C596A/B7 Datasheet: Sometimes available at the VIA website8 9 * VIA Technologies, Inc. VT82C686A/B10 Datasheet: Sometimes available at the VIA website11 12 * VIA Technologies, Inc. VT8231, VT8233, VT8233A13 Datasheet: available on request from VIA14 15 * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT825116 Datasheet: available on request and under NDA from VIA17 18 * VIA Technologies, Inc. CX70019 Datasheet: available on request and under NDA from VIA20 21 * VIA Technologies, Inc. VX800/VX82022 Datasheet: available on http://linux.via.com.tw23 24 * VIA Technologies, Inc. VX855/VX87525 Datasheet: available on http://linux.via.com.tw26 27 * VIA Technologies, Inc. VX90028 Datasheet: available on http://linux.via.com.tw29 30Authors:31 - Kyösti Mälkki <kmalkki@cc.hut.fi>,32 - Mark D. Studebaker <mdsxyz123@yahoo.com>,33 - Jean Delvare <jdelvare@suse.de>34 35Module Parameters36-----------------37 38* force: int39 Forcibly enable the SMBus controller. DANGEROUS!40* force_addr: int41 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!42 43Description44-----------45 46i2c-viapro is a true SMBus host driver for motherboards with one of the47supported VIA south bridges.48 49Your ``lspci -n`` listing must show one of these :50 51 ================ ======================52 device 1106:3050 (VT82C596A function 3)53 device 1106:3051 (VT82C596B function 3)54 device 1106:3057 (VT82C686 function 4)55 device 1106:3074 (VT8233)56 device 1106:3147 (VT8233A)57 device 1106:8235 (VT8231 function 4)58 device 1106:3177 (VT8235)59 device 1106:3227 (VT8237R)60 device 1106:3337 (VT8237A)61 device 1106:3372 (VT8237S)62 device 1106:3287 (VT8251)63 device 1106:8324 (CX700)64 device 1106:8353 (VX800/VX820)65 device 1106:8409 (VX855/VX875)66 device 1106:8410 (VX900)67 ================ ======================68 69If none of these show up, you should look in the BIOS for settings like70enable ACPI / SMBus or even USB.71 72Except for the oldest chips (VT82C596A/B, VT82C686A and most probably73VT8231), this driver supports I2C block transactions. Such transactions74are mainly useful to read from and write to EEPROMs.75 76The CX700/VX800/VX820 additionally appears to support SMBus PEC, although77this driver doesn't implement it yet.78