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PCIe r6.0, sec 6.6.1, states that the host should wait for at least 100
msec from the end of a conventional reset (PERST# is de-asserted) before
sending a configuration request to ensure that the device is able to
respond with a "Request Retry Status" completion.
Add the PCIE_T_RRS_READY_MS macro to define this wait time and modify
rockchip_pcie_host_init_port() to add this 100ms sleep after deasserting
PERST# using the ep_gpio GPIO.
Link: https://lore.kernel.org/linux-pci/20240413004120.1099089-3-dlemoal@kernel.org
Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
70a7bfb1e5