path: root/Documentation/i2c/busses/i2c-sis69x
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authorLinus Torvalds <>2005-04-16 15:20:36 -0700
committerLinus Torvalds <>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/i2c/busses/i2c-sis69x
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+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 <>
+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 <> 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 cant 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 <> or
+via the project's mailing list: <>. 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.
+Thank You
+Mark D. Studebaker <>
+ - design hints and bug fixes
+Alexander Maylsh <>
+ - ditto, plus an important datasheet... almost the one I really wanted
+Hans-Günter Lütke Uphues <>
+ - patch for SiS735
+Robert Zwerus <>
+ - testing for SiS645DX
+Kianusch Sayah Karadji <>
+ - patch for SiS645DX/962
+Ken Healy
+ - patch for SiS655
+To anyone else who has written w/ feedback, thanks!