linux-kernel - Re: [PATCH] dt-bindings: usb: add properties for hard wired devices

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Date:   Tue, 29 Sep 2020 14:06:39 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH] dt-bindings: usb: add properties for hard wired devices

On Mon, 2020-09-28 at 13:12 -0500, Rob Herring wrote:
> On Mon, Sep 28, 2020 at 02:39:50PM +0800, Chunfeng Yun wrote:
> > Add some optional properties which are needed for hard wired devices
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> >  Documentation/devicetree/bindings/usb/usb-hcd.yaml | 11 +++++++++++
> >  1 file changed, 11 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/usb-hcd.yaml b/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> > index 7263b7f2b510..1194a82887e7 100644
> > --- a/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> > +++ b/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> > @@ -22,6 +22,17 @@ properties:
> >      description:
> >        Name specifier for the USB PHY
> >  
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +patternProperties:
> > +  "^hub|device@[0-9a-f]+$":
> 
> Could be any class of device, so '@[0-9a-f]+$'
You mean we will use different standard node name for each usb class?
e.g.
Use 'ethernet@*' for a usb ethernet adapter, and use 'camera@*' for a
usb camera sensor?

> 
> > +    type: object
> > +    description: The hard wired USB devices. See usb/usb-device.txt
> 
> Ideally, we'd convert usb-device.txt to schema and reference it here.
Ok, I'll try to do it.

BTW: Does the compatible support pattern? Is there any example I can
refer to?

Thanks

> 
> > +
> >  examples:
> >    - |
> >      usb {
> > -- 
> > 2.18.0