linux-kernel - Re: [PATCH 1/4] dt-bindings: thermal: tsens: Add ipq9574 compatible

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Date:   Wed, 3 May 2023 09:42:28 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Varadarajan Narayanan <quic_varada@...cinc.com>
Cc:     agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        amitk@...nel.org, thara.gopinath@...il.com, rafael@...nel.org,
        daniel.lezcano@...aro.org, rui.zhang@...el.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Praveenkumar I <quic_ipkumar@...cinc.com>
Subject: Re: [PATCH 1/4] dt-bindings: thermal: tsens: Add ipq9574 compatible

On 03/05/2023 09:10, Varadarajan Narayanan wrote:
> On Mon, May 01, 2023 at 09:08:49AM +0200, Krzysztof Kozlowski wrote:
>> On 28/04/2023 16:52, Varadarajan Narayanan wrote:
>>> From: Praveenkumar I <quic_ipkumar@...cinc.com>
>>>
>>> Qualcomm IPQ9574 has tsens v2.3.1 block, which is similar to IPQ8074 tsens.
>>>
>>> Signed-off-by: Praveenkumar I <quic_ipkumar@...cinc.com>
>>> Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
>>> ---
>>>  Documentation/devicetree/bindings/thermal/qcom-tsens.yaml | 3 +++
>>>  1 file changed, 3 insertions(+)
>>>
>>> diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
>>> index d1ec963..8e2208c 100644
>>> --- a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
>>> +++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
>>> @@ -66,6 +66,7 @@ properties:
>>>        - description: v2 of TSENS with combined interrupt
>>>          enum:
>>>            - qcom,ipq8074-tsens
>>> +          - qcom,ipq9574-tsens
>>
>> Your drive change indicates they are compatible, so make them
>> compatible. 9574 followed by 8074.
> 
> Not able to understand. You want IPQ9574 to use "qcom,ipq8074-tsens"
> instead of adding a "qcom,ipq9574-tsens" and no need to add an extra
> entry to the driver like

Assuming the devices are really compatible, which your driver change
suggests, I want to use two compatibles. 9574 followed by 8074 fallback,
just like we do for all Qualcomm IP blocks. Then as you said - no need
for driver change.

Best regards,
Krzysztof