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diff --git a/Documentation/i2c/busses/i2c-sis96x.rst b/Documentation/i2c/busses/i2c-sis96x.rst new file mode 100644 index 000000000000..437cc1d89588 --- /dev/null +++ b/Documentation/i2c/busses/i2c-sis96x.rst @@ -0,0 +1,82 @@ +======================== +Kernel driver i2c-sis96x +======================== + +Replaces 2.4.x i2c-sis645 + +Supported adapters: + + * 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 <mhoffman@lightlink.com> + +Description +----------- + +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 <amalysh@web.de> for providing the +SiS630 datasheet (and driver). + +The command ``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 <mhoffman@lightlink.com> or +via the linux-i2c mailing list: <linux-i2c@vger.kernel.org>. Please send bug +reports and/or success stories as well. + + +TO DOs +------ + +* The driver does not support SMBus block reads/writes; I may add them if a + scenario is found where they're needed. + + +Thank You +--------- + +Mark D. Studebaker <mdsxyz123@yahoo.com> + - design hints and bug fixes + +Alexander Maylsh <amalysh@web.de> + - ditto, plus an important datasheet... almost the one I really wanted + +Hans-Günter Lütke Uphues <hg_lu@t-online.de> + - patch for SiS735 + +Robert Zwerus <arzie@dds.nl> + - testing for SiS645DX + +Kianusch Sayah Karadji <kianusch@sk-tech.net> + - patch for SiS645DX/962 + +Ken Healy + - patch for SiS655 + +To anyone else who has written w/ feedback, thanks! |