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@quicinc.com
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 canbe supported. The XHCI host controller has support to allocate multipleevent rings, which can be assigned to different clients/users. The DWC3controller has a maximum of 8 interrupters. If this is not defined thenthe value will be defaulted to 1. This parameter is used only whenoperating 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