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| author | Vidya Sagar <vidyas@nvidia.com> | 2024-05-08 23:11:36 +0530 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-06-03 16:17:36 -0500 |
| commit | 407abde9caee0d8f757fc8bed43fa5efc6fe509a (patch) | |
| tree | 150850c61b3b61994e06e4c4f0e203316a64c984 /drivers/pci/pci.h | |
| parent | 9d7d5db8e78ef1b67690bbffa5af60016d8e279d (diff) | |
| download | linux-407abde9caee0d8f757fc8bed43fa5efc6fe509a.tar.gz linux-407abde9caee0d8f757fc8bed43fa5efc6fe509a.tar.bz2 linux-407abde9caee0d8f757fc8bed43fa5efc6fe509a.zip | |
PCI: of: Add of_pci_preserve_config() for per-host bridge support
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>
Diffstat (limited to 'drivers/pci/pci.h')
| -rw-r--r-- | drivers/pci/pci.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 0df6bab385cd..0ad3cb69ac1b 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -648,6 +648,7 @@ int of_pci_get_max_link_speed(struct device_node *node); u32 of_pci_get_slot_power_limit(struct device_node *node, u8 *slot_power_limit_value, u8 *slot_power_limit_scale); +bool of_pci_preserve_config(struct device_node *node); int pci_set_of_node(struct pci_dev *dev); void pci_release_of_node(struct pci_dev *dev); void pci_set_bus_of_node(struct pci_bus *bus); @@ -686,6 +687,11 @@ of_pci_get_slot_power_limit(struct device_node *node, return 0; } +static inline bool of_pci_preserve_config(struct device_node *node) +{ + return false; +} + static inline int pci_set_of_node(struct pci_dev *dev) { return 0; } static inline void pci_release_of_node(struct pci_dev *dev) { } static inline void pci_set_bus_of_node(struct pci_bus *bus) { } |