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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/pci/pci.txt')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/pci/pci.txt | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/pci/pci.txt b/kernel/Documentation/devicetree/bindings/pci/pci.txt new file mode 100644 index 000000000..f8fbe9af7 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/pci/pci.txt @@ -0,0 +1,20 @@ +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. |