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    SubjectRe: [PATCH 4/4] dt-bindings: usb: usb-xhci: add USB offload support
    On Tue, Jan 19, 2021 at 06:10:44PM +0800, Howard Yen wrote:
    > Document USB offload support for usb-xhci.

    Is this a standard XHCI capability or specific to certain
    implementations? Do all versions of DWC3 support it?

    >
    > For example:
    >
    > &usbdrd_dwc3 {
    > ...
    > /* support usb offloading, 0: disabled, 1: audio */
    > offload = <1>;
    > ...
    > };
    >
    > Signed-off-by: Howard Yen <howardyen@google.com>
    > ---
    > Documentation/devicetree/bindings/usb/usb-xhci.txt | 1 +
    > 1 file changed, 1 insertion(+)
    >
    > diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt
    > index b120dd6612a2..aab1fd499f15 100644
    > --- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
    > +++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt
    > @@ -46,6 +46,7 @@ Optional properties:
    > - quirk-broken-port-ped: set if the controller has broken port disable mechanism
    > - imod-interval-ns: default interrupt moderation interval is 5000ns
    > - phys : see usb-hcd.yaml in the current directory
    > + - offload: supporting USB offload feature, 0: disabled, 1: audio

    What does not present mean? Unless you need 'keep the h/w default', then
    this can be boolean instead.

    >
    > additionally the properties from usb-hcd.yaml (in the current directory) are
    > supported.
    > --
    > 2.30.0.284.gd98b1dd5eaa7-goog
    >

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