linux-kernel - Re: [PATCH V3 1/5] dt-bindings: virtio: Add binding for virtio devices

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Message-ID: <CAK8P3a3bCk+iA+YziQrQFg6xH_d9cyySdTN_1j94D9CA8a_Sjw@mail.gmail.com>
Date:   Mon, 26 Jul 2021 17:53:56 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Jason Wang <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Bill Mills <bill.mills@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Jie Deng <jie.deng@...el.com>,
        DTML <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE" 
        <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH V3 1/5] dt-bindings: virtio: Add binding for virtio devices

On Mon, Jul 26, 2021 at 4:57 PM Rob Herring <robh+dt@...nel.org> wrote:
> On Sun, Jul 25, 2021 at 10:52 PM Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > +    description: |
> > +      Exactly one node describing the virtio device. The name of the node isn't
> > +      significant but its phandle can be used to by a user of the virtio device.
> > +
> > +  compatible:
> > +    pattern: "^virtio,[0-9a-f]+$"
>
> DID is only 4 chars? If so, "^virtio,[0-9a-f]{1,4}$"

Any opinion on whether this should have any namespace prefix (or infix, I guess)
after "virtio,"?

I previously suggested making it "virtio,device[0-9a-f]{1,4}$", which would
make it clearer that the following digits are the device ID rather
than something
else we might define in the future. Viresh picked this version because it's
somewhat more consistent with other subsystems.

       Arnd