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2026-08-12Documentation: PCI: Document how to write PCI Host Controller driversManivannan Sadhasivam
Writing a PCI Host Controller driver requires bringing up the Root Complex hardware and registering it with the PCI core in a specific sequence. Add a guide describing these steps to help developers write new drivers. It covers the Root Complex topology and enumeration, and walks through the driver flow, including resource setup, Configuration Space accessors, address translation, interrupt handling, Link training, power management, shutdown and removal, using standard guidelines/best practices. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://patch.msgid.link/20260803-pci-doc-v1-1-2814f8672cad@oss.qualcomm.com
2025-05-21PCI: rcar-gen4: Document how to obtain platform firmwareYoshihiro Shimoda
Renesas R-Car V4H (r8a779g0) has PCIe controller, and it requires specific firmware downloading. So, add a document about the firmware how to get. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> [kwilczynski: commit log, refactor the document content and then add this new file to a correct index under the top-level PCI documentation] Signed-off-by: Krzysztof WilczyƄski <kwilczynski@kernel.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20250507100947.608875-1-yoshihiro.shimoda.uh@renesas.com