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Renesas R-Car V4H (r8a779g0) has a PCIe controller, and it requires
specific firmware downloading. The firmware is now available via
linux-firmware.git repository. So the existing documentation about
obtaining the firmware becomes obsolete. Hence, drop it.
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260921203716.73663-1-marek.vasut+renesas@mailbox.org
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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
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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 Wilczyński <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
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