diff options
| author | Simon Glass <sjg@chromium.org> | 2015-11-20 03:27:00 (GMT) |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-12-01 13:26:36 (GMT) |
| commit | 9f60fb0db4b70c65760cb1799b76de1c9b71644d (patch) | |
| tree | 9c8f9d5815a9a2bb315b683d87fd446b2dbfc689 | |
| parent | 9289db6c60bc9caa285fc6459db9236d92ba94f6 (diff) | |
| download | u-boot-9f60fb0db4b70c65760cb1799b76de1c9b71644d.tar.xz | |
dm: pci: Add a function to get the controller for a bus
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>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
| -rw-r--r-- | drivers/pci/pci-uclass.c | 8 | ||||
| -rw-r--r-- | include/pci.h | 8 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index e38e0b2..f3f5f00 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_is_on_pci_bus(dev)) + 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 ec2d104..f3dda70 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 { |