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Message-ID: <44fa6910-c21b-977a-4d2a-72e149085de7@linaro.org>
Date:   Tue, 29 Aug 2023 08:37:31 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Neil Armstrong <neil.armstrong@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Vinod Koul <vkoul@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-crypto@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Om Prakash Singh <quic_omprsing@...cinc.com>
Subject: Re: [PATCH v3 2/6] dt-bindings: crypto: qcom,prng: document that RNG
 on SM8450 is a TRNG

On 28/08/2023 10:04, Neil Armstrong wrote:
> It has been reported at [1] the RNG HW on SM8450 is in fact a True Random
> Number Generator and no more Pseudo, document this by adding
> a new qcom,trng and the corresponding SoC specific sm8450 compatible.
> 
> [1] https://lore.kernel.org/all/20230818161720.3644424-1-quic_omprsing@quicinc.com/
> 
> Suggested-by: Om Prakash Singh <quic_omprsing@...cinc.com>
> Suggested-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> Reviewed-by: Om Prakash Singh <quic_omprsing@...cinc.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
>  .../devicetree/bindings/crypto/qcom,prng.yaml      | 24 +++++++++++++++++-----
>  1 file changed, 19 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/crypto/qcom,prng.yaml b/Documentation/devicetree/bindings/crypto/qcom,prng.yaml
> index bb42f4588b40..4245c9e424a3 100644
> --- a/Documentation/devicetree/bindings/crypto/qcom,prng.yaml
> +++ b/Documentation/devicetree/bindings/crypto/qcom,prng.yaml
> @@ -11,9 +11,13 @@ maintainers:
>  
>  properties:
>    compatible:
> -    enum:
> -      - qcom,prng  # 8916 etc.
> -      - qcom,prng-ee  # 8996 and later using EE
> +    oneOf:
> +      - enum:
> +          - qcom,prng  # 8916 etc.
> +          - qcom,prng-ee  # 8996 and later using EE
> +      - items:
> +          - const: qcom,sm8450-trng

Make it already an enum, so you won't have to change same lines twice.


Best regards,
Krzysztof

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