Messages in this thread | | | Date | Mon, 28 Aug 2023 19:05:35 -0700 | Subject | Re: [PATCH v3 11/28] dt-bindings: usb: dwc3: Add snps,num-hc-interrupters definition | From | Wesley Cheng <> |
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Hi Rob,
On 3/11/2023 5:40 AM, Rob Herring wrote: > On Wed, Mar 08, 2023 at 03:57:34PM -0800, 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. >> >> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> >> --- >> .../devicetree/bindings/usb/snps,dwc3.yaml | 13 +++++++++++++ >> 1 file changed, 13 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml >> index be36956af53b..4e2417191f93 100644 >> --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml >> +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml >> @@ -359,6 +359,19 @@ 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. > > Is this an XHCI or DWC3 feature? The former should be added to the XHCI > binding. >
Sorry for the late response...message got routed to a folder I don't frequently check...
This is a XHCI feature, but the DWC3 design is built in a way that DWC3 host initializes the XHCI device and populates the properties associated to XHCI dev.
Will update the XHCI yaml as well for non-DWC3 based SoCs.
Thanks Wesley Cheng
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