linux-kernel - Re: [PATCH 08/14] dt-bindings: ufs: qcom: Add sm6115 binding

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Date:   Sat, 3 Sep 2022 19:54:01 +0300
From:   Iskren Chernev <iskren.chernev@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        Bart Van Assche <bvanassche@....org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/14] dt-bindings: ufs: qcom: Add sm6115 binding



On 9/1/22 19:11, Krzysztof Kozlowski wrote:
> On 01/09/2022 10:24, Iskren Chernev wrote:
>> Add SM6115 UFS to DT schema.
>>
>> Signed-off-by: Iskren Chernev <iskren.chernev@...il.com>
>> ---
>>  .../devicetree/bindings/ufs/qcom,ufs.yaml     | 26 +++++++++++++++++++
>>  1 file changed, 26 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
>> index f2d6298d926c..7c5f6e2e6d4c 100644
>> --- a/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
>> +++ b/Documentation/devicetree/bindings/ufs/qcom,ufs.yaml
>> @@ -28,6 +28,7 @@ properties:
>>            - qcom,msm8998-ufshc
>>            - qcom,sc8280xp-ufshc
>>            - qcom,sdm845-ufshc
>> +          - qcom,sm6115-ufshc
>>            - qcom,sm6350-ufshc
>>            - qcom,sm8150-ufshc
>>            - qcom,sm8250-ufshc
>> @@ -178,6 +179,31 @@ allOf:
>>            minItems: 1
>>            maxItems: 1
>>
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            enum:
>> +              - qcom,sm6115-ufshc
>> +    then:
>> +      properties:
>> +        clocks:
>> +          minItems: 8
>> +          maxItems: 8
>> +        clock-names:
>> +          items:
>> +            - const: core_clk
>> +            - const: bus_aggr_clk
>> +            - const: iface_clk
>> +            - const: core_clk_unipro
>> +            - const: core_clk_ice
>
> Use existing name and put it in the same place as existing variant - sdm845:
> ice_core_clk

The only problem with sdm845 bindings is the presence of rx_lane1_sync_clk
clock. I'm guessing I could pass zeros there, because it shouldn't be used. Or
it could be moved to last property and then min/maxItems to guard, but that is
a change to something more-or-less immutable.

> Best regards,
> Krzysztof

Regards,
Iskren