[PATCH] Hotplug for openfirmware/macio devices
jeffm at suse.com
Fri Sep 17 08:27:48 EST 2004
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Jeff Mahoney wrote:
| Hey all -
| Many devices on the macintosh hardware platform are hidden behind a
| macio asic that places devices beyond the PCI bus for hotplug. Loading
| the driver manually works fine, but we have this wonderful hotplug
| system now. Why should macio be a second class citizen?
| At least for me, the most noticable one was my airport card, but there
| may be others. I only have an ibook and a powermac.
| Attached are three patches, which do the following:
| * kernel-of-hotplug.diff; against 2.6.9-rc2 (mainline)
| ~ - exports OF information to userspace
| ~ - removes struct of_device in favor of struct of_device_id, which
| ~ uses character arrays such that the structure can be more easily
| ~ used by module-init-tools [the renaming is required to use the
| ~ MODULE_DEVICE_TABLE macro]
| ~ - changes the semantics of OF_MATCH_ANY to be an empty string
| ~ - adds the name, type, and compat strings to the macio sysfs tree
| ~ - adds a hotplug filter to pass the name, type, and compat info
| ~ to hotplug
| ~ - adds the appropriate MODULE_DEVICE_TABLE entries so that
| ~ module-init-tools can know about macio devices
| ~ - (Yes, I know this information is available via /proc/device_tree,
| ~ but sysfs is a much more natural fit)
| * hotplug-macio.diff
| ~ - macio.rc: handles coldplugging of devices by traversing
| ~ the macio sysfs tree
| ~ - macio.agent: handles macio hotplug events
| * module-init-tools-3.0-pre10-openfirmware.diff
| ~ - adds support for a modules.ofmap table so that the hotplug scripts
| ~ can determine which modules to load based on the OF information.
| Is there a limit for the length of the various OF strings? I've assumed
| 32 for the sake of testing, but it's completely arbitrary.
| Take a look if you're interested. My familiarity with the PPC world is
| peripheral at best. I'd love feedback.
As promised, updated kernel patch.
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