PCI: host-generic: Add common helpers for parsing Root Port properties

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Introduce generic helper functions to parse Root Port device tree nodes and
extract common properties like reset GPIOs. This allows multiple PCI host
controller drivers to share the same parsing logic.

Define struct pci_host_port to hold common Root Port properties (currently
only list of PERST# GPIO descriptors) and add pci_host_common_parse_ports()
to parse Root Port nodes from device tree.

Also add the 'ports' list to struct pci_host_bridge to better maintain
parsed Root Port information.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260422093549.407022-3-sherry.sun@nxp.com

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Sherry Sun 2026-04-22 17:35:39 +08:00 • committed by Bjorn Helgaas

parent e3d334156b

commit b269bb5e4c

4 changed files with 199 additions and 0 deletions

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169

drivers/pci/controller/pci-host-common.c

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28

drivers/pci/controller/pci-host-common.h

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1

drivers/pci/probe.c

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1

include/linux/pci.h

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