linux-kernel - Re: [PATCH V2] dt-bindings: clock: qcom: Remove required-opps from required list on SM8650

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Message-ID: <497c9438-5bb3-42d9-9df9-661235a556d2@kernel.org>
Date: Wed, 24 Jul 2024 10:08:09 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Jagadeesh Kona <quic_jkona@...cinc.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
 Taniya Das <quic_tdas@...cinc.com>,
 Satya Priya Kakitapalli <quic_skakitap@...cinc.com>,
 Imran Shaik <quic_imrashai@...cinc.com>,
 Ajit Pandey <quic_ajipan@...cinc.com>, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH V2] dt-bindings: clock: qcom: Remove required-opps from
 required list on SM8650

On 20/07/2024 07:28, Jagadeesh Kona wrote:
> On SM8650, the minimum voltage corner supported on MMCX from cmd-db is
> sufficient for clock controllers to operate and there is no need to specify
> the required-opps. Hence remove the required-opps property from the list of
> required properties for SM8650 camcc and videocc bindings.
> 
> This fixes:
> arch/arm64/boot/dts/qcom/sm8650-mtp.dtb: clock-controller@...0000:
> 'required-opps' is a required property
> 
> arch/arm64/boot/dts/qcom/sm8650-mtp.dtb: clock-controller@...0000:
> 'required-opps' is a required property
> 
> Fixes: a6a61b9701d1 ("dt-bindings: clock: qcom: Add SM8650 video clock controller")
> Fixes: 1ae3f0578e0e ("dt-bindings: clock: qcom: Add SM8650 camera clock controller")
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202407070147.C9c3oTqS-lkp@intel.com/
> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
> ---
> Changes in V2:
>  - Made required: conditional and dropped required-opps from it only for SM8650 platform
>  - Dropped Krzysztof Acked-by tag due to above changes
>  - Link to V1: https://lore.kernel.org/all/20240708130836.19273-1-quic_jkona@quicinc.com/#r
> 
> .../bindings/clock/qcom,sm8450-camcc.yaml     | 26 +++++++++++++------
>  .../bindings/clock/qcom,sm8450-videocc.yaml   | 25 +++++++++++++-----
>  2 files changed, 36 insertions(+), 15 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,sm8450-camcc.yaml b/Documentation/devicetree/bindings/clock/qcom,sm8450-camcc.yaml
> index f58edfc10f4c..8698c801ed11 100644
> --- a/Documentation/devicetree/bindings/clock/qcom,sm8450-camcc.yaml
> +++ b/Documentation/devicetree/bindings/clock/qcom,sm8450-camcc.yaml
> @@ -21,9 +21,6 @@ description: |
>      include/dt-bindings/clock/qcom,sm8650-camcc.h
>      include/dt-bindings/clock/qcom,x1e80100-camcc.h
>  
> -allOf:
> -  - $ref: qcom,gcc.yaml#
> -
>  properties:
>    compatible:
>      enum:
> @@ -53,11 +50,24 @@ properties:
>    reg:
>      maxItems: 1
>  
> -required:

You cannot remove required block.

> -  - compatible
> -  - clocks
> -  - power-domains
> -  - required-opps
> +allOf:
> +  - $ref: qcom,gcc.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: qcom,sm8650-camcc
> +    then:
> +      required:
> +        - compatible
> +        - clocks
> +        - power-domains
> +    else:
> +      required:
> +        - compatible
> +        - clocks
> +        - power-domains
> +        - required-opps
>  
>  unevaluatedProperties: false
>  
> diff --git a/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml b/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml
> index b2792b4bb554..2e5a061f33d6 100644
> --- a/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml
> +++ b/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml
> @@ -40,15 +40,26 @@ properties:
>      description:
>        A phandle to an OPP node describing required MMCX performance point.
>  
> -required:

No, you cannot remove required block.

To clarify: there is almost no single binding using your style. Even if
there is one, then 99 others are using it differently. Do not implement
things entirely different than everyone else. This is the same for C
code you send upstream. No difference here...

Best regards,
Krzysztof