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

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Message-Id: <XJ8UDR.9Y06T8FUTMOH2@gmail.com>
Date:   Tue, 21 Jun 2022 21:28:45 +0400
From:   Yassine Oudjana <yassine.oudjana@...il.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
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, 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.

>>   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/