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Date:   Tue, 21 Nov 2023 11:19:50 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Mark Gross <markgross@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 1/3] dt-bindings: connector: usb: add altmodes description

On Tue, 21 Nov 2023 at 10:31, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 20/11/2023 23:00, Dmitry Baryshkov wrote:
> > Add description of the USB-C AltModes supported on the particular USB-C
> > connector. This is required for devices like Qualcomm Robotics RB5,
> > which have no other way to express alternative modes supported by the
> > hardware platform.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > ---
> >  .../bindings/connector/usb-connector.yaml     | 29 +++++++++++++++++++
> >  1 file changed, 29 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/connector/usb-connector.yaml b/Documentation/devicetree/bindings/connector/usb-connector.yaml
> > index 7c8a3e8430d3..c1aaac861d9d 100644
> > --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
> > +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
> > @@ -171,6 +171,28 @@ properties:
> >        offer the power, Capability Mismatch is set. Required for power sink and
> >        power dual role.
> >
> > +  altmodes:
> > +    type: object
> > +    description: List of Alternative Modes supported by the schematics on the
> > +      particular device. This is only necessary if there are no other means to
> > +      discover supported alternative modes (e.g. through the UCSI firmware
> > +      interface).
> > +
> > +    patternProperties:
> > +      "^(displayport)$":
>
> This is just a property, so should be under "properties:".

Having it under properties would make adding new altmodes harder.

Inherently it should become something like
"^(displayport|virtuallink|thunderbolt)$".

>
> The rest looks good to me, but I don't know USB that much to judge.
>
> Best regards,
> Krzysztof
>


-- 
With best wishes
Dmitry

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