From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- Documentation/i2c/busses/i2c-viapro | 69 +++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Documentation/i2c/busses/i2c-viapro (limited to 'Documentation/i2c/busses/i2c-viapro') diff --git a/Documentation/i2c/busses/i2c-viapro b/Documentation/i2c/busses/i2c-viapro new file mode 100644 index 00000000..2e758b0e --- /dev/null +++ b/Documentation/i2c/busses/i2c-viapro @@ -0,0 +1,69 @@ +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: Availability unknown + +Authors: + Kyösti Mälkki , + Mark D. Studebaker , + Jean Delvare + +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) + +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. -- cgit v1.2.3