linux-kernel - Re: [PATCH] dt-bindings: arm: cpus: Deprecate Qualcomm generic compatibles

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Message-ID: <7kifzh3xkwkfa4ij3xtcowttaquw6ua2wkecpnhtyczbbhy2tb@agrqsbs6cjku>
Date: Thu, 15 Jan 2026 11:36:45 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: arm: cpus: Deprecate Qualcomm generic
 compatibles

On Thu, Jan 15, 2026 at 09:35:04AM +0100, Krzysztof Kozlowski wrote:
> Move four compatibles for Qualcomm Krait, Kryo, Oryon and Scorpion
> custom CPU cores out of the enum into separate one with deprecated: true
> annotation, because these are too generic names.
> 
> These are names of the families and there are significant differences
> within individual processors, e.g. Kryo6xx can based on architectures
> from Cortex-X2, A710, A510 to A78 and probably more.
> 
> Just like other vendor processors are differentiated, also Qualcomm CPUs
> should come with specific compatibles.
> 
> Cc: Bjorn Andersson <andersson@...nel.org>
> Cc: Konrad Dybcio <konradybcio@...nel.org>
> Cc: linux-arm-msm@...r.kernel.org
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
> ---
>  .../devicetree/bindings/arm/cpus.yaml         | 290 +++++++++---------
>  1 file changed, 147 insertions(+), 143 deletions(-)
> 
> +      - enum:
> +          - qcom,krait
> +          - qcom,kryo
> +          - qcom,oryon
> +          - qcom,scorpion
> +        # Too generic, do not use in new code
> +        deprecated: true

I wouldn't even question Kryo and Oryon, it's obvious (or at least I
have an idea) what should be used for those cores. Except that "Kryo"
was an external name for MSM8996 cores. But for Krait and Scorpion I
really have doubts and questions.

For Scorpio I'd have a vague idea of having qcom,scorpion and
qcom,scorpion-mp (or -uni and -mp if you dislike the bare scorpion).

For Krait...  I really don't know. Your proposals?

>  
>    enable-method:
>      $ref: /schemas/types.yaml#/definitions/string
> -- 
> 2.51.0
> 

-- 
With best wishes
Dmitry