linux-kernel - Re: [PATCH v3 1/3] dt-bindings: reserved-memory: rmtfs: Make qcom,vmid an array

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Message-ID: <97dafa30-8b76-8bf9-4411-be6d10e4c71a@linaro.org>
Date:   Mon, 9 Jan 2023 12:41:00 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-arm-msm@...r.kernel.org, andersson@...nel.org,
        agross@...nel.org
Cc:     marijn.suijten@...ainline.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] dt-bindings: reserved-memory: rmtfs: Make
 qcom,vmid an array



On 9.01.2023 10:51, Krzysztof Kozlowski wrote:
> On 09/01/2023 10:39, Konrad Dybcio wrote:
>> Some SoCs mandate that the RMTFS is also assigned to the NAV VM, while
>> others really don't want that. Since it has to be conditional, turn
>> qcom,vmid into an u32 array so that we can handle the NAV case, as
>> well as other similar ones if they pop up in the future.
>>
>> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>> ---
>> v2 -> v3:
>> Rewrite to accomodate for changes, don't pick up tags
>>
>>  .../devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml   | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml b/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml
>> index 2998f1c8f0db..cfc2fda30eba 100644
>> --- a/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml
>> +++ b/Documentation/devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml
>> @@ -27,9 +27,9 @@ properties:
>>        identifier of the client to use this region for buffers
>>  
>>    qcom,vmid:
>> -    $ref: /schemas/types.yaml#/definitions/uint32
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>>      description: >
>> -      vmid of the remote processor, to set up memory protection
>> +      Array of vmids of the remote processors, to set up memory protection
> 
> You need now min and maxItems.
Hm, I tested it with and without:

minItems: 1
maxItems: 2

on DTs with either one or two VMIDs defined and neither complains..

Konrad
> 
> Best regards,
> Krzysztof
>