On 2012年09月21日 08:25, Sarah Sharp wrote: > Hi Tianyu, > > You're correct that the USB core and the xHCI driver has a slightly > different architecture than the ACPI representation. We have one PCI > device that has two USB buses/roothubs underneath it. That's because > external USB 3.0 hubs show up as two USB devices: a USB 3.0 only > portion, and a USB 2.0 portion. We wanted roothubs to act the same way. > > The architecture looks something like this: > > struct pci_dev > | > struct usb_hcd *primary_hcd -- struct usb_hcd *secondary_hcd > | | > struct usb_bus struct usb_bus > | | > struct usb_device *root_hub struct usb_device *root_hub > | | > struct device struct device > > Where the primary_hcd is for the USB 2.0 roothub, and the secondary_hcd > is for the USB 3.0 roothub. > > So you're trying to bind one ACPI node (RHUB) to the struct device > contained in those two root_hubs, correct? That goal seems sane to me. > Yes, that is my patch's purpose. > Sarah Sharp -- Best regards Tianyu Lan -- 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
