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- PCI bus bridges have standardized Device Tree bindings:
- PCI Bus Binding to: IEEE Std 1275-1994
- http://www.openfirmware.org/ofwg/bindings/pci/pci2_1.pdf
- And for the interrupt mapping part:
- Open Firmware Recommended Practice: Interrupt Mapping
- http://www.openfirmware.org/1275/practice/imap/imap0_9d.pdf
- Additionally to the properties specified in the above standards a host bridge
- driver implementation may support the following properties:
- - linux,pci-domain:
- If present this property assigns a fixed PCI domain number to a host bridge,
- otherwise an unstable (across boots) unique number will be assigned.
- It is required to either not set this property at all or set it for all
- host bridges in the system, otherwise potentially conflicting domain numbers
- may be assigned to root buses behind different host bridges. The domain
- number for each host bridge in the system must be unique.
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