diff options
Diffstat (limited to 'drivers/pci/pci-acpi.c')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 52b8434d4d6e..65113b6eed14 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -395,6 +395,35 @@ bool pciehp_is_native(struct pci_dev *bridge) } /** + * shpchp_is_native - Check whether a hotplug port is handled by the OS + * @bridge: Hotplug port to check + * + * Returns true if the given @bridge is handled by the native SHPC hotplug + * driver. + */ +bool shpchp_is_native(struct pci_dev *bridge) +{ + const struct pci_host_bridge *host; + + if (!IS_ENABLED(CONFIG_HOTPLUG_PCI_SHPC)) + return false; + + /* + * It is assumed that AMD GOLAM chips support SHPC but they do not + * have SHPC capability. + */ + if (bridge->vendor == PCI_VENDOR_ID_AMD && + bridge->device == PCI_DEVICE_ID_AMD_GOLAM_7450) + return true; + + if (!pci_find_capability(bridge, PCI_CAP_ID_SHPC)) + return false; + + host = pci_find_host_bridge(bridge->bus); + return host->native_shpc_hotplug; +} + +/** * pci_acpi_wake_bus - Root bus wakeup notification fork function. * @context: Device wakeup context. */ |