Subject: Re: [PATCH v2 37/52] dt-bindings: usb: dwc3: Fix usb-phy check

From: Rob Herring <[email-masked]>
Date: Fri, 3 Sep 2021 14:49:50 -0500

On Wed, Sep 01, 2021 at 03:36:35PM +0300, Felipe Balbi wrote:
> 
> Maxime Ripard <[email-masked]> writes:
> 
> > The original binding was allowing any combination of usb2-phy and
> > usb3-phy in the phys and phy-names properties.
> >
> > However, the current binding enforces that those properties must be a
> > list of usb2-phy and usb3-phy, with exactly one element, effectively
> > making usb2-phy the only value being valid.
> >
> > Let's rework the properties description to allow either one or two
> > element picked with values either usb2-phy or usb3-phy. The rest of the
> > tooling makes sure that we don't get any duplicate value, so this should
> > be what we want.
> >
> > Cc: Felipe Balbi <[email-masked]>
> > Cc: Greg Kroah-Hartman <[email-masked]>
> > Cc: [email-masked]
> > Signed-off-by: Maxime Ripard <[email-masked]>
> > ---
> >  Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > index 078fb7889593..c1c970073681 100644
> > --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > @@ -73,15 +73,15 @@ properties:
> >  
> >    phys:
> >      minItems: 1
> > -    items:
> > -      - description: USB2/HS PHY
> > -      - description: USB3/SS PHY
> > +    maxItems: 2
> 
> I'm not sure you should enforce a maximum of 2 PHYs. Some systems may
> use more than one USB2 PHY to take care of different parts of the USB
> link.

It was already limited to 2. This change doesn't change that.

Rob

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