PCI: of: Add of_pci_preserve_config() for per-host bridge support

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Add of_pci_preserve_config() to look for the "linux,pci-probe-only"
property under a specified node.  If it's not found there, look under
"of_chosen" in addition.

If the caller didn't specify a node, look under "of_chosen".

With a future patch, this will support "linux,pci-probe-only" on a per host
bridge basis based on the presence of the property in the respective PCI
host bridge DT node.

Implement of_pci_check_probe_only() using of_pci_preserve_config().

Link: https://lore.kernel.org/r/20240508174138.3630283-3-vidyas@nvidia.com
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

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Vidya Sagar 2024-05-08 23:11:36 +05:30 • committed by Bjorn Helgaas

parent 9d7d5db8e7

commit 407abde9ca

2 changed files with 50 additions and 10 deletions

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60

drivers/pci/of.c

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6

drivers/pci/pci.h

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