On Wednesday, September 25, 2013 08:39:44 PM Zhang Rui wrote: > Hi, > > Currently, all the ACPI device objects are enumerated in ACPI bus. > Some of them are used as real devices, while some of them are used > as shadow devices. > > This is misleading and confusing because we have several instances > in Linux driver model for a single device. > So Rafael proposed to stop using ACPI as a shadow bus. > To do this, we need to: > 1. for the devices that already have physical nodes, just leave them > as they are today. > 2. for the devices that are not associated with any physical nodes, > make them platform bus devices. > 3. create the sysfs subtree of ACPI objects under /sys/firmware/acpi/ > 4. remove ACPI bus from driver model. > > This patch set, which converts two different kinds of ACPI > devices/drivers to platform bus, is an experimentation of Step 2 above. > And in general, so far so good. I do not see anything can really stuck > us so far, although I do get a couple of problems when converting > the ideapad_laptop driver and rewrite the patches for a few times. > > I've tested the patches on an Lenovo U300s, which has a VPC2004 device. > Both the AC adapter and the ideapad_laptop drivers work well. > They are shown in platform bus, and their sysfs/debugfs work well. Matthew, any objections to this? Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
