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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/i2c/busses/i2c-viapro.rst | |
| parent | Initial commit. (diff) | |
| download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip | |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/i2c/busses/i2c-viapro.rst')
| -rw-r--r-- | Documentation/i2c/busses/i2c-viapro.rst | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/Documentation/i2c/busses/i2c-viapro.rst b/Documentation/i2c/busses/i2c-viapro.rst new file mode 100644 index 000000000..1762f0cf9 --- /dev/null +++ b/Documentation/i2c/busses/i2c-viapro.rst @@ -0,0 +1,77 @@ +======================== +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: available on http://linux.via.com.tw + + * VIA Technologies, Inc. VX900 + Datasheet: available on http://linux.via.com.tw + +Authors: + - Kyösti Mälkki <kmalkki@cc.hut.fi>, + - Mark D. Studebaker <mdsxyz123@yahoo.com>, + - Jean Delvare <jdelvare@suse.de> + +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) + device 1106:8410 (VX900) + ================ ====================== + +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. |