i2c Keywest Kernel boot problem on new G5s

[jjhursey]

We recently acquired a new Dual G5 2.3 GHz desktop system from Apple (PowerPC 7,3), and tried to install Gentoo on it using the install-ppc64-g5-minimal-2005.0.iso install. After entering the default response at the first prompt [G5], the system starts booting then produces a kernel panic of the form (I have a literal screen shot if you are interested in all the details):

=======
i2c /dev entries driver
Oops: kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=2 POWERMAC
Modules linked in:
<snip>
NIP [ ] .create_iface+0x154/0x550
LR [ ] .create_iface+0x128/0x550
Call Trace:
.create_iface
.of_device_probe
.driver_probe_device
.driver_attach
.bus_add_driver
.driver_register
.of_register_driver
.i2c_keywest_init
.init
.kernel_thread
Instruction dump:
=======

Seems that it is an issue with i2c keywest in the new hardware from Apple.
After taking a look around on the ozlabs.org site, I found this thread:
http://ozlabs.org/pipermail/linuxppc64-dev/2005-May/004129.html
which ended in a patch for this problem:
http://ozlabs.org/pipermail/linuxppc64-dev/2005-May/004135.html

We would really like to run Gentoo on these sytems as soon as possible, so if anyone has some spare moments to apply the patch and rebuild the iso, I would be willing to work with them to get it running on these systems. I don't have a Linux PPC64 box to build on, so I need a hand getting the kernel in place. I am also unfamiliar with the kernel configuration options that Gentoo uses for its install disks, I would be interested in learning though.

Cheers,
Josh

[k0fcc]

If you get not response here more knowledgable, jump over to the irc channel (gentoo ppc 64) and see if you can find corsair or tgall_foo and let them know.

[jjhursey]

As an update.
We have been able to compile the kernel with the patch from here:
http://ozlabs.org/pipermail/linuxppc64-dev/2005-May/004140.html

After rebuilding the iso, it allows for progress in the startup. So that patch seems to work to fix this problem.

Thus, it should just be a matter of adding it to the list of patches for the linux kernel.