linux-kernel - Re: [PATCH 5/6] dt-bindings: clock: qcom,msm8996-apcc: Fix clocks

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Date:   Tue, 21 Jun 2022 20:32:40 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Yassine Oudjana <yassine.oudjana@...il.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        Yassine Oudjana <y.oudjana@...tonmail.com>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] dt-bindings: clock: qcom,msm8996-apcc: Fix clocks

On Tue, 21 Jun 2022 at 20:29, Yassine Oudjana <yassine.oudjana@...il.com> wrote:
>
>
> On Tue, Jun 21 2022 at 20:07:50 +0300, Dmitry Baryshkov
> <dmitry.baryshkov@...aro.org> wrote:
> > On Tue, 21 Jun 2022 at 19:07, Yassine Oudjana
> > <yassine.oudjana@...il.com> wrote:
> >>
> >>  From: Yassine Oudjana <y.oudjana@...tonmail.com>
> >>
> >>  The clocks currently listed in clocks and clock-names are the ones
> >>  supplied by this clock controller, not the ones it consumes. Replace
> >>  them with the only clock it consumes - the on-board oscillator (XO),
> >>  and make the properties required.
> >>
> >>  Signed-off-by: Yassine Oudjana <y.oudjana@...tonmail.com>
> >>  ---
> >>   .../bindings/clock/qcom,msm8996-apcc.yaml         | 15
> >> +++++++--------
> >>   1 file changed, 7 insertions(+), 8 deletions(-)
> >>
> >>  diff --git
> >> a/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
> >> b/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
> >>  index a20cb10636dd..c4971234fef8 100644
> >>  --- a/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
> >>  +++ b/Documentation/devicetree/bindings/clock/qcom,msm8996-apcc.yaml
> >>  @@ -26,22 +26,18 @@ properties:
> >>
> >>     clocks:
> >>       items:
> >>  -      - description: Primary PLL clock for power cluster (little)
> >>  -      - description: Primary PLL clock for perf cluster (big)
> >>  -      - description: Alternate PLL clock for power cluster (little)
> >>  -      - description: Alternate PLL clock for perf cluster (big)
> >>  +      - description: XO source
> >>
> >>     clock-names:
> >>       items:
> >>  -      - const: pwrcl_pll
> >>  -      - const: perfcl_pll
> >>  -      - const: pwrcl_alt_pll
> >>  -      - const: perfcl_alt_pll
> >>  +      - const: xo
> >>
> >>   required:
> >>     - compatible
> >>     - reg
> >>     - '#clock-cells'
> >>  +  - clocks
> >>  +  - clock-names
> >
> > I think we can not list them as required, as then older DT files won't
> > pass schema validation. But I'll leave this into the hands of Rob and
> > Krzyshtof.
>
> The old DT files that didn't have XO defined had a wrong
> compatible string to begin with (fixed in [1]), so I don't
> think it's a problem.

Looks fine to me then. (Though Rob and Krzysztof have the deciding voice here).

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

>
> >>   additionalProperties: false
> >>
> >>  @@ -51,4 +47,7 @@ examples:
> >>           compatible = "qcom,msm8996-apcc";
> >>           reg = <0x6400000 0x90000>;
> >>           #clock-cells = <1>;
> >>  +
> >>  +        clocks = <&xo_board>;
> >>  +        clock-names = "xo";
> >>       };
> >>  --
> >>  2.36.1
> >>
> >
> >
> > --
> > With best wishes
> > Dmitry
>
> [1]
> https://lore.kernel.org/linux-arm-msm/20210527192958.775434-1-konrad.dybcio@somainline.org/
>
>


-- 
With best wishes
Dmitry