Messages in this thread |  | | Date | Mon, 16 Dec 2019 09:38:33 -0600 | From | Rob Herring <> | Subject | Re: [PATCH v4 1/2] dt-bindings: usb: add "hub,interval" property |
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On Tue, Dec 03, 2019 at 06:15:36PM +0800, Ikjoon Jang wrote: > Add "hub,interval" property to usb-device, so hub device can override > endpoint descriptor's bInterval. > > When we know reducing autosuspend delay for built-in HIDs is better for > power saving, we can reduce it to the optimal value. But if a parent hub > has a long bInterval, mouse lags a lot from more frequent autosuspend. > So this enables overriding bInterval for a hard wired hub device only > when we know that reduces the power consumption. > > Signed-off-by: Ikjoon Jang <ikjn@chromium.org> > --- > Documentation/devicetree/bindings/usb/usb-device.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/usb-device.txt b/Documentation/devicetree/bindings/usb/usb-device.txt > index 036be172b1ae..44bef2ff2704 100644 > --- a/Documentation/devicetree/bindings/usb/usb-device.txt > +++ b/Documentation/devicetree/bindings/usb/usb-device.txt > @@ -66,6 +66,9 @@ Required properties for host-controller nodes with device nodes: > - #size-cells: shall be 0 > > > +Optional properties for hub nodes > +- hub,interval: bInterval of status change endpoint. The range is 1-255.
'hub' is not a vendor.
'b-interval' instead.
Rob
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