Documentation/i2c/busses/i2c-viapro

   1 Kernel driver i2c-viapro
   2
   3 Supported 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: available on http://linux.via.com.tw
  24
  25   * VIA Technologies, Inc. VX900
  26     Datasheet: available on http://linux.via.com.tw
  27
  28 Authors:
  29         Kyösti Mälkki <kmalkki@cc.hut.fi>,
  30         Mark D. Studebaker <mdsxyz123@yahoo.com>,
  31         Jean Delvare <jdelvare@suse.de>
  32
  33 Module Parameters
  34 -----------------
  35
  36 * force: int
  37   Forcibly enable the SMBus controller. DANGEROUS!
  38 * force_addr: int
  39   Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
  40
  41 Description
  42 -----------
  43
  44 i2c-viapro is a true SMBus host driver for motherboards with one of the
  45 supported VIA south bridges.
  46
  47 Your lspci -n listing must show one of these :
  48
  49  device 1106:3050   (VT82C596A function 3)
  50  device 1106:3051   (VT82C596B function 3)
  51  device 1106:3057   (VT82C686 function 4)
  52  device 1106:3074   (VT8233)
  53  device 1106:3147   (VT8233A)
  54  device 1106:8235   (VT8231 function 4)
  55  device 1106:3177   (VT8235)
  56  device 1106:3227   (VT8237R)
  57  device 1106:3337   (VT8237A)
  58  device 1106:3372   (VT8237S)
  59  device 1106:3287   (VT8251)
  60  device 1106:8324   (CX700)
  61  device 1106:8353   (VX800/VX820)
  62  device 1106:8409   (VX855/VX875)
  63  device 1106:8410   (VX900)
  64
  65 If none of these show up, you should look in the BIOS for settings like
  66 enable ACPI / SMBus or even USB.
  67
  68 Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
  69 VT8231), this driver supports I2C block transactions. Such transactions
  70 are mainly useful to read from and write to EEPROMs.
  71
  72 The CX700/VX800/VX820 additionally appears to support SMBus PEC, although
  73 this driver doesn't implement it yet.