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2801f7252d
41e5c0f81d("of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()") added parsing of the "linux,pci-domain" property, but didn't add the binding documentation. Since this property will be supported by a number of host bridge drivers, add it to the common PCI binding doc. Fixes:41e5c0f81d("of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr()") Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> Acked-by: Rob Herring <robh@kernel.org>
21 lines
909 B
Plaintext
21 lines
909 B
Plaintext
PCI bus bridges have standardized Device Tree bindings:
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PCI Bus Binding to: IEEE Std 1275-1994
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http://www.openfirmware.org/ofwg/bindings/pci/pci2_1.pdf
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And for the interrupt mapping part:
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Open Firmware Recommended Practice: Interrupt Mapping
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http://www.openfirmware.org/1275/practice/imap/imap0_9d.pdf
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Additionally to the properties specified in the above standards a host bridge
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driver implementation may support the following properties:
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- linux,pci-domain:
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If present this property assigns a fixed PCI domain number to a host bridge,
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otherwise an unstable (across boots) unique number will be assigned.
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It is required to either not set this property at all or set it for all
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host bridges in the system, otherwise potentially conflicting domain numbers
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may be assigned to root buses behind different host bridges. The domain
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number for each host bridge in the system must be unique.
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