On Thu, Feb 22, 2024 at 06:12:31PM +0530, Vidya Sagar wrote: > Extend the meaning of 'linux,pci-probe-only' to cover the cases where > it is applicable only to a specific PCIe host bridge if defined in a > PCIe node instead of chosen node. Add the documentation for the same > in schemas/pci/pci-host-bridge.yaml This isn't specific to PCIe, it's generic to PCI. > Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx> > --- > dtschema/schemas/chosen.yaml | 2 ++ > dtschema/schemas/pci/pci-host-bridge.yaml | 8 ++++++++ > 2 files changed, 10 insertions(+) > > diff --git a/dtschema/schemas/chosen.yaml b/dtschema/schemas/chosen.yaml > index 6d5c3f1..9152df3 100644 > --- a/dtschema/schemas/chosen.yaml > +++ b/dtschema/schemas/chosen.yaml > @@ -144,6 +144,8 @@ properties: > Optional property which takes a single-cell argument. If '0', then Linux > will assign devices in its usual manner, otherwise it will not try to > assign devices and instead use them as they are configured already. > + NOTE:- To restrict the applicability of this property to a specific PCIe > + host bridge, please refer to /schemas/pci/pci-host-bridge.yaml > > stdout-path: > $ref: types.yaml#/definitions/string > diff --git a/dtschema/schemas/pci/pci-host-bridge.yaml b/dtschema/schemas/pci/pci-host-bridge.yaml > index fbbb829..d6d595d 100644 > --- a/dtschema/schemas/pci/pci-host-bridge.yaml > +++ b/dtschema/schemas/pci/pci-host-bridge.yaml > @@ -31,6 +31,14 @@ properties: > number for each host bridge in the system must be unique. > $ref: /schemas/types.yaml#/definitions/uint32 > > + linux,pci-probe-only: > + description: If present, Linux will not try to assign devices and instead > + use them as they are configured already by the platform firmware for this > + particular host bridge. I think it would be more precise to say that Linux will not reassign BARs or bridge windows. "Assign devices" seems a little bit ambiguous. > + NOTE:- If defined in chosen node, this property has system wide applicability. > + Please refer to /schemas/chosen.yaml for more info. > + type: boolean > + > msi-map: > $ref: /schemas/types.yaml#/definitions/uint32-matrix > items: > -- > 2.25.1 >
