linux-kernel - Re: [RESEND PATCH v2 3/5] dt-bindings: firmware: qcom-scm: Add optional interrupt

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Date:   Tue, 18 Oct 2022 09:11:43 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sibi Sankar <quic_sibis@...cinc.com>,
        Guru Das Srinagesh <quic_gurus@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     David Heidelberg <david@...t.cz>,
        Robert Marko <robimarko@...il.com>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Elliot Berman <quic_eberman@...cinc.com>
Subject: Re: [RESEND PATCH v2 3/5] dt-bindings: firmware: qcom-scm: Add
 optional interrupt

On 18/10/2022 01:49, Sibi Sankar wrote:
>>>   Documentation/devicetree/bindings/firmware/qcom,scm.yaml | 5 +++++
>>>   1 file changed, 5 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
>>> index e279fd2..4d6c89f 100644
>>> --- a/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
>>> +++ b/Documentation/devicetree/bindings/firmware/qcom,scm.yaml
>>> @@ -75,6 +75,11 @@ properties:
>>>         Specify this flag to remove SCM call serialization. Need to ensure that
>>>         the firmware being used supports this feature first.
>>>   
>>> +  interrupts:
>>> +    description:
>>> +      The wait-queue interrupt that firmware raises as part of handshake
>>> +      protocol to handle sleeping SCM calls.
>>
>> Missing constraints.
>>
>> Which firmwares support it?
>>
> 
> The interrupt property for scm firmware from a binding perspective
> is completely optional i.e. not all tz fw running in the wild on sm8450
> devices support this feature. The bootloader does the interrupt property
> addition on sm8450 devices with support.

OK.

Best regards,
Krzysztof