1Kernel driver i2c-viapro 2 3Supported adapters: 4 * VIA Technologies, Inc. VT82C596A/B 5 Datasheet: Sometimes available at the VIA website 6 7 * VIA Technologies, Inc. VT82C686A/B 8 Datasheet: Sometimes available at the VIA website 9 10 * VIA Technologies, Inc. VT8231, VT8233, VT8233A 11 Datasheet: available on request from VIA 12 13 * VIA Technologies, Inc. VT8235, VT8237R, VT8237A, VT8237S, VT8251 14 Datasheet: available on request and under NDA from VIA 15 16 * VIA Technologies, Inc. CX700 17 Datasheet: available on request and under NDA from VIA 18 19 * VIA Technologies, Inc. VX800/VX820 20 Datasheet: available on http://linux.via.com.tw 21 22 * VIA Technologies, Inc. VX855/VX875 23 Datasheet: Availability unknown 24 25Authors: 26 Ky��sti M��lkki <kmalkki@cc.hut.fi>, 27 Mark D. Studebaker <mdsxyz123@yahoo.com>, 28 Jean Delvare <khali@linux-fr.org> 29 30Module Parameters 31----------------- 32 33* force: int 34 Forcibly enable the SMBus controller. DANGEROUS! 35* force_addr: int 36 Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS! 37 38Description 39----------- 40 41i2c-viapro is a true SMBus host driver for motherboards with one of the 42supported VIA south bridges. 43 44Your lspci -n listing must show one of these : 45 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) 60 61If none of these show up, you should look in the BIOS for settings like 62enable ACPI / SMBus or even USB. 63 64Except for the oldest chips (VT82C596A/B, VT82C686A and most probably 65VT8231), this driver supports I2C block transactions. Such transactions 66are mainly useful to read from and write to EEPROMs. 67 68The CX700/VX800/VX820 additionally appears to support SMBus PEC, although 69this driver doesn't implement it yet. 70