kernel/git/stable/linux.git/Documentation/PCI/controller/pci-controller-drivers.rst, branch masterLinux kernel stable treehttps://git.rulkc.org/pub/scm/linux/kernel/git/stable/linux.git/atom?h=master2026-08-12T19:20:48+00:00Documentation: PCI: Document how to write PCI Host Controller drivers2026-08-12T19:20:48+00:00Manivannan Sadhasivammanivannan.sadhasivam@oss.qualcomm.com2026-08-03T07:25:24+00:00urn:sha1:1af156149d9a7de8e6cc44f09f4150cb677bf1bf
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