linux-kernel - Re: [PATCH V5 1/2] dt-bindings: firmware: qcom-scm: Add optional interrupt

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Date:   Thu, 24 Nov 2022 12:13:30 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sibi Sankar <quic_sibis@...cinc.com>, andersson@...nel.org
Cc:     agross@...nel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        konrad.dybcio@...ainline.org, robimarko@...il.com,
        quic_gurus@...cinc.com, quic_rjendra@...cinc.com
Subject: Re: [PATCH V5 1/2] dt-bindings: firmware: qcom-scm: Add optional
 interrupt

On 23/11/2022 21:46, Sibi Sankar wrote:
> From: Guru Das Srinagesh <quic_gurus@...cinc.com>
> 
> Add an interrupt specification to the bindings to support the wait-queue
> feature.

Subject - this is qcom,scm, not qcom-scm.


> 
> Signed-off-by: Guru Das Srinagesh <quic_gurus@...cinc.com>
> Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
> 
> v5:
> - Pick up R-b
> 
> v4:
> - Qualify bindings [Krzysztoff]
> 
>  Documentation/devicetree/bindings/firmware/qcom,scm.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
> index 25688571ee7c..aea6e0c86a89 100644
> --- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
> +++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
> @@ -73,6 +73,12 @@ properties:
>    '#reset-cells':
>      const: 1
>  
> +  interrupts:
> +    description:
> +      The wait-queue interrupt that firmware raises as part of handshake
> +      protocol to handle sleeping SCM calls.
> +    maxItems: 1

Which devices have interrupts?

We talked about it here:
https://lore.kernel.org/all/2464d90f-64e9-5e3c-404b-10394c3bc302@quicinc.com/
and here:
https://lore.kernel.org/all/c20edd0d-7613-5683-60e7-54317cac6e0b@linaro.org/

But I still don't get which devices support it and which do not.


BTW:
https://lore.kernel.org/all/20221122092345.44369-2-krzysztof.kozlowski@linaro.org/


Best regards,
Krzysztof