From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4 Description of problem: Kernel problems related to the newest revision of the Apple G5 Dual Processor Systems. Reference: http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.12-rc5 Benjamin Herrenschmidt <benh.org>: [PATCH] ppc64: Fix booting on latest G5 models The latest speedbumped Apple G5 models have a "bug" in the Open Firmware device tree that lacks the proper interrupt routing information for the northbridge i2c controller. Apple's driver silently falls back into a sub-optimal "polled" mode (heh, maybe they didn't even notice the bug because of that :), our driver didn't properly check and crashes :( This patch fixes our driver to not crash, and adds code to the prom_init() OF trampoline code that detects the "bug" and adds the missing information back for this chipset revision. This fixes booting and thermal control on these models. Signed-off-by: Benjamin Herrenschmidt <benh.org> Signed-off-by: Linus Torvalds <torvalds> Benjamin Herrenschmidt <benh.org>: [PATCH] ppc64: Fix g5 hw timebase sync The hardware sync of the timebase on SMP G5s uses a black magic incantation to the i2c clock chip that was inspired from what Darwin does. However, this was an earlier version of Darwin that was ... buggy ! heh. This causes the latest models to break though when starting SMP, so it's worth fixing. Here's a new version of the incantation based on careful transcription of the said incantations as found in the latest version of apple's temple. Signed-off-by: Benjamin Herrenschmidt <benh.org> Signed-off-by: Linus Torvalds <torvalds> Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.Boot any Linux PPC64 Kernel < 2.6.12 2.Kernel Panic After I2C Probe Additional info:
The kernel in rawhide today should have this fixed, as it includes -rc5
Installed and running 2.6.11-1.1366_FC4-ppc from the rawhide yesterday 06/01/2005. Thanks