Benjamin Herrenschmidt writes:
 > This is a libata driver for the "macio" IDE controller used on most Apple
 > PowerMac and PowerBooks. It's a libata equivalent of drivers/ide/ppc/pmac.c
 > 
 > It supports all the features of its predecessor, including mediabay hotplug
 > and suspend/resume. It should also support module load/unload.
 > 
 > The timing calculations have been simplified to use pre-calculated tables
 > compared to drivers/ide/pmac.c and it uses the new mediabay interface
 > provided by a previous patch.
 > 
 > Signed-off-by: Benjamin Herrenschmidt [off-list ref]
 > ---
 > 
 > v2. Better tested now, seems to be reasonably solid.
 > 
 > Addressed Tejun comments and made remove more robust vs. media-bay,
 > should also fix Andreas problem.

Tested in 2.6.32-rc8 and 2.6.32 final on a G4 eMac.
Works fine, except for the yaboot problem:

/sbin/installkernel 2.6.32 vmlinux System.map 

ofpath: Driver:  is not supported
ybin: Unable to find OpenFirmware path for boot=/dev/sda2
ybin: Please add ofboot=<path> where <path> is the OpenFirmware path to /dev/sda2 to /etc/yaboot.conf
ofpath: Driver:  is not supported
ybin: Unable to determine OpenFirmware path for macosx=/dev/sda4
ybin: Try specifying the real OpenFirmware path for macosx=/dev/sda4 in /etc/yaboot.conf

(userspace is YDL 6.2)

/Mikael