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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>
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2 changed files with 16 additions and 0 deletions
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@ -53,6 +53,14 @@ struct pci_controller *pci_bus_to_hose(int busnum)
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return dev_get_uclass_priv(bus);
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return dev_get_uclass_priv(bus);
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}
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}
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struct udevice *pci_get_controller(struct udevice *dev)
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{
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while (device_is_on_pci_bus(dev))
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dev = dev->parent;
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return dev;
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}
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pci_dev_t pci_get_bdf(struct udevice *dev)
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pci_dev_t pci_get_bdf(struct udevice *dev)
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{
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{
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struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
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struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
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@ -1122,6 +1122,14 @@ ulong pci_conv_32_to_size(ulong value, uint offset, enum pci_size_t size);
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ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
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ulong pci_conv_size_to_32(ulong old, ulong value, uint offset,
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enum pci_size_t size);
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enum pci_size_t size);
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/**
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* pci_get_controller() - obtain the controller to use for a bus
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*
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* @dev: Device to check
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* @return pointer to the controller device for this bus
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*/
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struct udevice *pci_get_controller(struct udevice *dev);
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/**
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/**
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* struct dm_pci_emul_ops - PCI device emulator operations
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* struct dm_pci_emul_ops - PCI device emulator operations
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*/
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*/
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