Pratyush Anand wrote: > Hello All, > > I have started to develop PCI express support in linux and u-boot for a new platform. > I have some doubt about hotplug behaviour. > > As I understand : > > PCIE link up (LTSSM) is enabled in boot loader(u-boot). > So link up and first device detection will happen there only. > > Linux kernel does not do link up and expects all these enumerations to be done by boot-loader. > > My system HW structure: > > There is only a root-complex in my system (which supports hotplug ) > and no switch is connected downstream to this root complex's port. > I connect my device(EP) directly to the root complex. > > My quextion is > Can I connect any PCIE device (EP) directly to the RC once linux is alreday up? > I think pciehp driver (PCIe native hotplug driver) should be able to detect a hotplug slot under the root port, though I have nerver tried it yet. And acpiphp driver (ACPI based hotplug driver) also works if your platform supports ACPI based hotplug. Thanks, Kenji Kaneshige > Regards > Pratyush > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
