Commit | Line | Data |
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301d2d87 LW |
1 | PCI bus bridges have standardized Device Tree bindings: |
2 | ||
3 | PCI Bus Binding to: IEEE Std 1275-1994 | |
f517256a | 4 | http://www.firmware.org/1275/bindings/pci/pci2_1.pdf |
301d2d87 LW |
5 | |
6 | And for the interrupt mapping part: | |
7 | ||
8 | Open Firmware Recommended Practice: Interrupt Mapping | |
f517256a | 9 | http://www.firmware.org/1275/practice/imap/imap0_9d.pdf |
2801f725 LS |
10 | |
11 | Additionally to the properties specified in the above standards a host bridge | |
12 | driver implementation may support the following properties: | |
13 | ||
14 | - linux,pci-domain: | |
15 | If present this property assigns a fixed PCI domain number to a host bridge, | |
16 | otherwise an unstable (across boots) unique number will be assigned. | |
17 | It is required to either not set this property at all or set it for all | |
18 | host bridges in the system, otherwise potentially conflicting domain numbers | |
19 | may be assigned to root buses behind different host bridges. The domain | |
20 | number for each host bridge in the system must be unique. |