Hi Rob, > -----Original Message----- > From: Rob Herring <robh@xxxxxxxxxx> > Sent: Wednesday, September 30, 2020 2:11 AM > To: Jun Li <jun.li@xxxxxxx> > Cc: shawnguo@xxxxxxxxxx; balbi@xxxxxxxxxx; mathias.nyman@xxxxxxxxx; > gregkh@xxxxxxxxxxxxxxxxxxx; s.hauer@xxxxxxxxxxxxxx; > kernel@xxxxxxxxxxxxxx; festevam@xxxxxxxxx; dl-linux-imx > <linux-imx@xxxxxxx>; Anson Huang <anson.huang@xxxxxxx>; Aisheng Dong > <aisheng.dong@xxxxxxx>; Peng Fan <peng.fan@xxxxxxx>; Andy Duan > <fugang.duan@xxxxxxx>; Joakim Zhang <qiangqing.zhang@xxxxxxx>; Horia > Geanta <horia.geanta@xxxxxxx>; linux-usb@xxxxxxxxxxxxxxx; > devicetree@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Subject: Re: [PATCH v3 1/6] dt-bindings: usb: xhci: add property to disable > xhci 64bit support > > On Tue, Sep 22, 2020 at 06:46:47PM +0800, Li Jun wrote: > > Add a property "xhci-64bit-support-disable" to disable xhci 64bit > > address dma, some SoC integration may not support 64bit DMA but the > > AC64 bit (bit 0) of HCCPARAMS1 is kept to be 1. > > Use 'dma-ranges' for this. Thanks, sent out v4 with dma-ranges property approach. Li Jun > > > Signed-off-by: Li Jun <jun.li@xxxxxxx> > > --- > > Documentation/devicetree/bindings/usb/usb-xhci.txt | 3 +++ > > 1 file changed, 3 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt > > b/Documentation/devicetree/bindings/usb/usb-xhci.txt > > index 0c5cff8..26446fb 100644 > > --- a/Documentation/devicetree/bindings/usb/usb-xhci.txt > > +++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt > > @@ -28,6 +28,9 @@ 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 > > + - xhci-64bit-support-disable: set if the AC64 bit (bit 0) of HCCPARAMS1 > is > > + set to be 1, but the controller actually can't handle 64-bit address > > + due to SoC integration. > > > > additionally the properties from usb-hcd.yaml (in the current > > directory) are supported. > > -- > > 2.7.4 > >
