diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-acpi.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 61e2fefeeda..87f4c504eaf 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -162,6 +162,20 @@ acpi_status pci_acpi_remove_pm_notifier(struct acpi_device *dev) return remove_pm_notifier(dev, pci_acpi_wake_dev); } +phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle) +{ + acpi_status status = AE_NOT_EXIST; + unsigned long long mcfg_addr; + + if (handle) + status = acpi_evaluate_integer(handle, METHOD_NAME__CBA, + NULL, &mcfg_addr); + if (ACPI_FAILURE(status)) + return 0; + + return (phys_addr_t)mcfg_addr; +} + /* * _SxD returns the D-state with the highest power * (lowest D-state number) supported in the S-state "x". |