3 Commits

Author	SHA1	Message	Date
Jean Delvare	399d6b2653	i2c: Fix oops on bus multiplexer driver loading ... The two I2C bus multiplexer drivers (i2c-amd756-s4882 and i2c-nforce2-s4985) make use of the bus they want to multiplex before checking if it is really present. Swap the instructions to test for presence first. This fixes a oops reported by Ingo Molnar. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ingo Molnar <mingo@elte.hu>	2008-08-10 22:56:15 +02:00
Jean Delvare	bd4bc3dbde	i2c: Clear i2c_adapter.dev on adapter removal ... Clear i2c_adapter.dev on adapter removal. This makes it possible to re-add the adapter at a later point, which some drivers (i2c-amd756-s4882, i2c-nforce2-s4985) actually do. This fixes a bug reported by John Stultz here: http://lkml.org/lkml/2008/7/15/720 and by Ingo Molar there: http://lkml.org/lkml/2008/7/16/78 Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: John Stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu>	2008-07-16 19:30:05 +02:00
Jean Delvare	279e902445	i2c-nforce2: Add support for multiplexing on the Tyan S4985 ... Just like the Tyan S4882, the S4985 uses a multiplexer to give access to all 16 memory module SPD EEPROMs. This specific i2c-nforce2-s4985 driver adds support for this. It is heavily based on the older i2c-amd756-s4882 driver. As more mainboards will use multiplexer chips, we will have to find a way to support them without having to write a new specfic driver for each. The recent changes to the i2c subsystem should help us, and the new gpio subsystem might help, too. Signed-off-by: Jean Delvare <khali@linux-fr.org>	2008-07-14 22:38:21 +02:00