Kernel driver i2c-sis96x¶
Replaces 2.4.x i2c-sis645
Silicon Integrated Systems Corp (SiS)
- Any combination of these host bridges:
645, 645DX (aka 646), 648, 650, 651, 655, 735, 745, 746
- and these south bridges:
961, 962, 963(L)
Author: Mark M. Hoffman <firstname.lastname@example.org>
This SMBus only driver is known to work on motherboards with the above named chipset combinations. The driver was developed without benefit of a proper datasheet from SiS. The SMBus registers are assumed compatible with those of the SiS630, although they are located in a completely different place. Thanks to Alexander Malysh <email@example.com> for providing the SiS630 datasheet (and driver).
lspci as root should produce something like these lines:
00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0645 00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016
or perhaps this:
00:00.0 Host bridge: Silicon Integrated Systems [SiS]: Unknown device 0645 00:02.0 ISA bridge: Silicon Integrated Systems [SiS]: Unknown device 0961 00:02.1 SMBus: Silicon Integrated Systems [SiS]: Unknown device 0016
(kernel versions later than 2.4.18 may fill in the “Unknown”s)
If you can’t see it please look on quirk_sis_96x_smbus (drivers/pci/quirks.c) (also if southbridge detection fails)
I suspect that this driver could be made to work for the following SiS chipsets as well: 635, and 635T. If anyone owns a board with those chips AND is willing to risk crashing & burning an otherwise well-behaved kernel in the name of progress… please contact me at <firstname.lastname@example.org> or via the linux-i2c mailing list: <email@example.com>. Please send bug reports and/or success stories as well.
The driver does not support SMBus block reads/writes; I may add them if a scenario is found where they’re needed.
- Mark D. Studebaker <firstname.lastname@example.org>
design hints and bug fixes
- Alexander Maylsh <email@example.com>
ditto, plus an important datasheet… almost the one I really wanted
- Hans-Günter Lütke Uphues <firstname.lastname@example.org>
patch for SiS735
- Robert Zwerus <email@example.com>
testing for SiS645DX
- Kianusch Sayah Karadji <firstname.lastname@example.org>
patch for SiS645DX/962
- Ken Healy
patch for SiS655
To anyone else who has written w/ feedback, thanks!