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Synopsys DesignWare core based PCIe controllers in Tegra234 SoC interface with Universal PHY (UPHY) module through a PIPE2UPHY (P2U) module. For each PCIe lane of a controller, there is a P2U unit instantiated at hardware level. This driver provides support for the programming required for each P2U that is going to be used for a PCIe controller. Signed-off-by: Vidya Sagar <vidyas@nvidia.com> Link: https://lore.kernel.org/r/20220629060435.25297-9-vidyas@nvidia.com Signed-off-by: Vinod Koul <vkoul@kernel.org>