A PCI bus may be a bridge device where the controller is the bridge's parent. Add a function to return the controller device, given a PCI device.
Signed-off-by: Simon Glass sjg@chromium.org ---
drivers/pci/pci-uclass.c | 8 ++++++++ include/pci.h | 8 ++++++++ 2 files changed, 16 insertions(+)
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 1c6df0f..527d3bb 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -53,6 +53,14 @@ struct pci_controller *pci_bus_to_hose(int busnum) return dev_get_uclass_priv(bus); }
+struct udevice *pci_get_controller(struct udevice *dev) +{ + while (device_get_uclass_id(dev->parent) == UCLASS_PCI) + dev = dev->parent; + + return dev; +} + pci_dev_t pci_get_bdf(struct udevice *dev) { struct pci_child_platdata *pplat = dev_get_parent_platdata(dev); diff --git a/include/pci.h b/include/pci.h index f40a83d..8b471ab 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1123,6 +1123,14 @@ ulong pci_conv_size_to_32(ulong old, ulong value, uint offset, enum pci_size_t size);
/** + * pci_get_controller() - obtain the controller to use for a bus + * + * @dev: Device to check + * @return pointer to the controller device for this bus + */ +struct udevice *pci_get_controller(struct udevice *dev); + +/** * struct dm_pci_emul_ops - PCI device emulator operations */ struct dm_pci_emul_ops {