On Thu, Jul 16, 2020 at 02:59:08PM -0700, Thinh Nguyen wrote: > Introduce num-lanes and lane-speed-mantissa-gbps for devices operating > in super-speed-plus. DWC_usb32 IP supports multiple lanes and can > operate in different sublink speeds. Currently the device controller > does not have the information of the phy's number of lanes supported. As > a result, the user can specify them through these properties if they are > different than the default setting. > > Signed-off-by: Thinh Nguyen <thinhn@xxxxxxxxxxxx> > --- > Documentation/devicetree/bindings/usb/dwc3.txt | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt > index d03edf9d3935..4eba0615562f 100644 > --- a/Documentation/devicetree/bindings/usb/dwc3.txt > +++ b/Documentation/devicetree/bindings/usb/dwc3.txt > @@ -86,6 +86,15 @@ Optional properties: > - snps,quirk-frame-length-adjustment: Value for GFLADJ_30MHZ field of GFLADJ > register for post-silicon frame length adjustment when the > fladj_30mhz_sdbnd signal is invalid or incorrect. > + - snps,num-lanes: set to specify the number of lanes to use. Valid inputs are > + 1 or 2. Apply if the maximum-speed is super-speed-plus > + only. Default value is 2 for DWC_usb32. For DWC_usb31, > + it is always 1 at super-speed-plus. > + - snps,lane-speed-mantissa-gbps: set to specify the symmetric lane speed > + mantissa in Gbps. Valid inputs are 5 or 10. Apply if > + the maximum-speed is super-speed-plus only. Default > + value is 10. For DWC_usb31, it's always 10 at > + super-speed-plus. This is all common USB things and should be common properties (which we may already have). Rob
