diff options
author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
---|---|---|
committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
commit | fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 (patch) | |
tree | 22962a4387943edc841c72a4e636a068c66d58fd /Documentation/i2c/busses/i2c-viapro | |
download | ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.zip ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.tar.gz |
Initial import of modified Linux 2.6.28 tree
Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
Diffstat (limited to 'Documentation/i2c/busses/i2c-viapro')
-rw-r--r-- | Documentation/i2c/busses/i2c-viapro | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/Documentation/i2c/busses/i2c-viapro b/Documentation/i2c/busses/i2c-viapro new file mode 100644 index 0000000..22efedf --- /dev/null +++ b/Documentation/i2c/busses/i2c-viapro @@ -0,0 +1,65 @@ +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 + +Authors: + Kyösti Mälkki <kmalkki@cc.hut.fi>, + Mark D. Studebaker <mdsxyz123@yahoo.com>, + Jean Delvare <khali@linux-fr.org> + +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) + +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. |