linux-kernel - Re: [RFC PATCH v2 1/3] dt-bindings: phy: qcom,qmp-usb3-dp: Add sm6350 compatible

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Message-Id: <COLABNHBQ1DG.1PB8SDY3FW1YY@otso>
Date:   Fri, 25 Nov 2022 10:55:31 +0100
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     "Johan Hovold" <johan@...nel.org>
Cc:     <linux-arm-msm@...r.kernel.org>,
        <~postmarketos/upstreaming@...ts.sr.ht>,
        <phone-devel@...r.kernel.org>, "Andy Gross" <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        "Vinod Koul" <vkoul@...nel.org>,
        "Kishon Vijay Abraham I" <kishon@...nel.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        <linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH v2 1/3] dt-bindings: phy: qcom,qmp-usb3-dp: Add
 sm6350 compatible

Hi Johan,

On Fri Nov 25, 2022 at 10:50 AM CET, Johan Hovold wrote:
> On Fri, Nov 25, 2022 at 10:27:47AM +0100, Luca Weiss wrote:
> > Add the compatible describing the combo phy found on SM6350.
> > 
> > Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> > ---
> > @Johan Hovold, I've sent this v2 as RFC because there are several things
> > where I have questions on how it should be done.
> > 
> > In this patch, you can see there's cfg_ahb (&xo_board) and power-domains
> > is not set. In msm-4.19 &gcc_usb30_prim_gdsc is only used in the
> > ssusb@...0000 node, or should I also add it to qmpphy?
>
> Yeah, you may need to add a platform specific section of the clocks,
> which appear to be different, even if I'm not sure they are currently
> described correctly (xo_board as cfg_ahb and "QLINK" as ref). How are
> they named in the vendor's dts?

This is the msm-4.19 dts:
https://android.googlesource.com/kernel/msm-extra/devicetree/+/refs/heads/android-msm-bramble-4.19-android11-qpr1/qcom/lagoon-usb.dtsi#354

>
> It should be OK to include the power-domain also for the PHY node.

Ack.

>
> >  .../bindings/phy/qcom,sc8280xp-qmp-usb43dp-phy.yaml          | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb43dp-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb43dp-phy.yaml
> > index 6f31693d9868..3e39e3e0504d 100644
> > --- a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb43dp-phy.yaml
> > +++ b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb43dp-phy.yaml
> > @@ -17,16 +17,18 @@ properties:
> >    compatible:
> >      enum:
> >        - qcom,sc8280xp-qmp-usb43dp-phy
> > +      - qcom,sm6350-qmp-usb3-dp-phy
> >  
> >    reg:
> >      maxItems: 1
> >  
> >    clocks:
> > -    maxItems: 4
> > +    maxItems: 5
> >  
> >    clock-names:
> >      items:
> >        - const: aux
> > +      - const: cfg_ahb
> >        - const: ref
> >        - const: com_aux
> >        - const: usb3_pipe
>
> So this would need to be moved to an allOf: construct at the end with
> one section each for sc8280xp and sm6350.

Ack.

Thanks for the quick response!

Regards,
Luca

>
> > @@ -61,7 +63,6 @@ required:
> >    - reg
> >    - clocks
> >    - clock-names
> > -  - power-domains
> >    - resets
> >    - reset-names
> >    - vdda-phy-supply
>
> Johan