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Renesas R-Car Gen4 PCIe controllers require vendor-specific initialization before .init(). To use dw->dbi and dw->num-lanes in the initialization code, introduce .pre_init() into struct dw_pcie_ep_ops. While at it, also introduce .deinit() to disable the controller by using vendor-specific de-initialization. Note that the ep_init in the struct dw_pcie_ep_ops should be renamed to init later. Link: https://lore.kernel.org/linux-pci/20231018085631.1121289-9-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Serge Semin <fancer.lancer@gmail.com>