linux-kernel - Re: [PATCH v4 2/5] dt-bindings: soc: qcom: eud: Add SM6115 / SM4250 support

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Date:   Fri, 5 May 2023 18:24:11 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-usb@...r.kernel.org
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-kernel@...r.kernel.org, bhupesh.linux@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org
Subject: Re: [PATCH v4 2/5] dt-bindings: soc: qcom: eud: Add SM6115 / SM4250
 support

On 05/05/2023 08:40, Bhupesh Sharma wrote:
> Add dt-bindings for EUD found on Qualcomm SM6115 / SM4250 SoC.
> 
> On this SoC (and derivatives) the enable bit inside 'tcsr_check_reg'
> needs to be set first to 'enable' the eud module.
> 
> So, update the dt-bindings to accommodate the third register
> property (TCSR Base) required by the driver on these SoCs.
> 
> Also for these SoCs, introduce a new bool property
> 'qcom,secure-mode-enable', which indicates that the mode manager
> needs to be accessed only via the secure world.
> 
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> ---
>  .../devicetree/bindings/soc/qcom/qcom,eud.yaml   | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml
> index f2c5ec7e6437..3b92cdf4e306 100644
> --- a/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml
> +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml
> @@ -18,17 +18,33 @@ properties:
>      items:
>        - enum:
>            - qcom,sc7280-eud
> +          - qcom,sm6115-eud
>        - const: qcom,eud
>  
>    reg:
> +    minItems: 2
>      items:
>        - description: EUD Base Register Region
>        - description: EUD Mode Manager Register
> +      - description: TCSR Base Register Region
> +
> +  reg-names:
> +    minItems: 2
> +    items:
> +      - const: eud-base
> +      - const: eud-mode-mgr
> +      - const: tcsr-base
>  
>    interrupts:
>      description: EUD interrupt
>      maxItems: 1
>  
> +  qcom,secure-mode-enable:
> +    type: boolean
> +    description:
> +      Indicates that the mode manager needs to be accessed only via the secure
> +      world (through 'scm' calls).

I understood tcsr-base aplies only to SM6115, so this should be further
constrained in allOf:if:then:.

Best regards,
Krzysztof