linux-kernel - Re: [PATCH] dt-bindings: dmaengine: qcom: gpi: Add minItems for interrupts

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Date:   Thu, 14 Apr 2022 13:44:55 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        linux-arm-msm@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: dmaengine: qcom: gpi: Add minItems for
 interrupts

On 14/04/2022 12:25, Vinod Koul wrote:
>>>        Interrupt lines for each GPI instance
>>> +    minItems: 1
>>
>> This should be some real case minimum, not just 1. Unless really only
>> one interrupt is also possible in existing variations?
> 
> So that depends on the channels available to use which can be worst case
> of 1. Maximum is 13.. Most of the controllers are between 12-13, but we
> dont want to change binding in future if controller has lesser channels
> right?

If the choice is per SoC-controller, then the best would be to limit in
allOf:if:then. However maybe the number of channels depends also on
other factor (e.g. secure world configuration)?


Best regards,
Krzysztof