Hello,
> Most boards using the pcie-dw-rockchip PCIe controller lack standard
> hotplug support.
>
> Thus, when an endpoint is attached to the SoC, users have to rescan the bus
> manually to enumerate the device. This can be avoided by using the
> 'dll_link_up' interrupt in the combined system interrupt 'sys'.
>
> Once the 'dll_link_up' irq is received, the bus underneath the host bridge
> is scanned to enumerate PCIe endpoint devices.
>
> This commit implements the same functionality that was implemented in the
> DWC based pcie-qcom driver in commit 4581403f6792 ("PCI: qcom: Enumerate
> endpoints based on Link up event in 'global_irq' interrupt").
>
> The Root Complex specific device tree binding for pcie-dw-rockchip already
> has the 'sys' interrupt marked as required, so there is no need to update
> the device tree binding. This also means that we can request the 'sys' IRQ
> unconditionally.
Applied to controller/rockchip, thank you!
[01/01] PCI: dw-rockchip: Enumerate endpoints based on dll_link_up IRQ in the combined sys IRQ
https://git.kernel.org/pci/pci/c/191b732176e7
Krzysztof
