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Date:   Mon, 28 Sep 2020 19:14:39 -0700
From:   Matthias Kaehlcke <mka@chromium.org>
To:     Doug Anderson <dianders@chromium.org>
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Rob Herring <robh+dt@kernel.org>,
        Frank Rowand <frowand.list@gmail.com>,
        LKML <linux-kernel@vger.kernel.org>, linux-usb@vger.kernel.org,
        Bastien Nocera <hadess@hadess.net>,
        Stephen Boyd <swboyd@chromium.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Ravi Chandra Sadineni <ravisadineni@chromium.org>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>, Peter Chen <peter.chen@nxp.com>
Subject: Re: [PATCH v4 1/2] dt-bindings: usb: Add binding for discrete
 onboard USB hubs
Message-ID: <20200929021439.GC1099144@google.com>
References: <20200928101326.v4.1.I248292623d3d0f6a4f0c5bc58478ca3c0062b49a@changeid>
 <CAD=FV=XWphkhFmEk6dzGn7h2mY5xBHY554rOfn+bSi5Nci27gA@mail.gmail.com>
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On Mon, Sep 28, 2020 at 03:13:26PM -0700, Doug Anderson wrote:
> Hi,
> 
> On Mon, Sep 28, 2020 at 10:14 AM Matthias Kaehlcke <mka@chromium.org> wrote:
> >
> > +examples:
> > +  - |
> > +    usb_hub: usb-hub {
> > +        compatible = "realtek,rts5411", "onboard-usb-hub";
> > +        vdd-supply = <&pp3300_hub>;

I will admit that using the name 'vdd' for a sole supply is somewhat
arbitrary, if anybody has better suggestions I'm open to it :)

> > +    };
> > +
> > +    usb_controller {
> 
> Super nitty nit: prefer dashes for node names.

ack

> > +        dr_mode = "host";
> > +        #address-cells = <1>;
> > +        #size-cells = <0>;
> > +
> > +        /* 2.0 hub on port 1 */
> > +        hub@1 {
> > +            compatible = "usbbda,5411";
> 
> Presumably we need something in the bindings for "usbbda,5411" ?

I'm not sure how this should look like in a .yaml. Rob, do you have any
suggestions?

Strictly speaking the compatible string isn't needed, the driver will match
the device without it based on VID/PID and the port.

> > +            reg = <1>;
> > +            hub = <&usb_hub>;
> > +        };
> > +
> > +        /* 3.0 hub on port 2 */
> > +        hub@2 {
> > +            compatible = "usbbda,411";
> 
> Presumably we need something in the bindings for "usbbda,411" ?

ditto