linux-kernel - Re: [PATCH v2 2/4] dt-bindings: usb: add properties for hard wired devices

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Date:   Tue, 13 Oct 2020 15:34:27 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Rob Herring <robh@...nel.org>
CC:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v2 2/4] dt-bindings: usb: add properties for hard wired
 devices

On Mon, 2020-10-12 at 11:00 -0500, Rob Herring wrote:
> On Sat, Oct 10, 2020 at 04:43:12PM +0800, Chunfeng Yun wrote:
> > Add some optional properties which are needed for hard wired devices
> > 
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
> > ---
> > v2 changes suggested by Rob:
> >    1. modify pattern to support any USB class
> >    2. refer to usb-device.yaml instead of usb-device.txt
> > ---
> >  .../devicetree/bindings/usb/usb-hcd.yaml      | 19 +++++++++++++++++++
> >  1 file changed, 19 insertions(+)
> 
> You can fold this into the first patch. While not explicit before, it 
> was implied.
Ok

> 
> Rob
> 
> > 
> > diff --git a/Documentation/devicetree/bindings/usb/usb-hcd.yaml b/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> > index 7263b7f2b510..42b295afdf32 100644
> > --- a/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> > +++ b/Documentation/devicetree/bindings/usb/usb-hcd.yaml
> > @@ -22,9 +22,28 @@ properties:
> >      description:
> >        Name specifier for the USB PHY
> >  
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +patternProperties:
> > +  "^[a-f]+@[0-9a-f]+$":
> 
> Just define the unit-address here: "@[0-9a-f]+$"
When I define it as "@[0-9a-f]+$", there is error:
"usb-hcd.example.dt.yaml: usb: hub@1: 'compatile' is a required
property"

> > +    type: object
> > +    $ref: /usb/usb-device.yaml
> > +    description: The hard wired USB devices
> 
> Need to also define 'reg' and 'compatible' here.
'reg' and 'compatible' are already defined in usb-device.yaml

> 
> > +
> >  examples:
> >    - |
> >      usb {
> >          phys = <&usb2_phy1>, <&usb3_phy1>;
> >          phy-names = "usb";
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        hub@1 {
> > +            compatible = "usb5e3,610";
> > +            reg = <1>;
> > +        };
> >      };
> > -- 
> > 2.18.0