Re: [PATCH] PCI: add missing DT binding for linux,pci-domain property

[Kumar Gala <galak@codeaurora.org>]

On Nov 4, 2014, at 5:47 AM, Lucas Stach <l.stach@pengutronix.de> wrote:

> This property was added by 41e5c0f81d3e
> (of/pci: Add pci_get_new_domain_nr() and of_get_pci_domain_nr())
> without the required binding documentation. As this property
> will be supported by a number of host bridge drivers going forward,
> add it to the common PCI binding doc.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> ---
> This is a non-critical fix, but may still qualify for 3.18-rc as
> the property was added in this release cycle.
> ---
> Documentation/devicetree/bindings/pci/pci.txt | 10 ++++++++++
> 1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pci/pci.txt b/Documentation/devicetree/bindings/pci/pci.txt
> index 41aeed38926d..b754f786ed5e 100644
> --- a/Documentation/devicetree/bindings/pci/pci.txt
> +++ b/Documentation/devicetree/bindings/pci/pci.txt
> @@ -7,3 +7,13 @@ 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 recommended 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.

Probably should add something about domain numbers being unique across all host bridgse.

- k

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