On 26/01/2023 04:14, Wesley Cheng wrote: > Add a new definition for specifying how many XHCI secondary interrupters > can be allocated. XHCI in general can potentially support up to 1024 > interrupters, which some uses may want to limit depending on how many > users utilize the interrupters. I cannot find in the code any user of this. Your next patch stores it, but which other patch uses stored value? What I still don't get how is this exactly hardware property, not policy or driver choice. > > Signed-off-by: Wesley Cheng <quic_wcheng@xxxxxxxxxxx> > --- > Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > index 6d78048c4613..4faaec9655e0 100644 > --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > @@ -349,6 +349,18 @@ properties: > items: > enum: [1, 4, 8, 16, 32, 64, 128, 256] > > + snps,num-hc-interrupters: > + description: > + Defines the maximum number of XHCI host controller interrupters that can > + be supported. The XHCI host controller has support to allocate multiple > + event rings, which can be assigned to different clients/users. The DWC3 > + controller has a maximum of 8 interrupters. If this is not defined then > + the value will be defaulted to 1. This parameter is used only when > + operating in host mode. > + $ref: /schemas/types.yaml#/definitions/uint8 > + minimum: 1 > + maximum: 8 default: 1 > + > port: > $ref: /schemas/graph.yaml#/properties/port > description: Best regards, Krzysztof
