linux-kernel - Re: [PATCH v1 3/8] dt-bindings: thermal: Add qcom,qmi-cooling yaml bindings

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Message-ID: <74b33eb5-a75b-479e-92b3-cb6e094e5610@oss.qualcomm.com>
Date: Wed, 31 Dec 2025 12:12:04 +0530
From: Gaurav Kohli <gaurav.kohli@....qualcomm.com>
To: Krzysztof Kozlowski <krzk@...nel.org>, andersson@...nel.org,
        mathieu.poirier@...aro.org, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, rafael@...nel.org, daniel.lezcano@...aro.org,
        rui.zhang@...el.com, lukasz.luba@....com, konradybcio@...nel.org,
        amitk@...nel.org, mani@...nel.org, casey.connolly@...aro.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v1 3/8] dt-bindings: thermal: Add qcom,qmi-cooling yaml
 bindings


On 12/24/2025 3:54 PM, Krzysztof Kozlowski wrote:
> On 24/12/2025 11:08, Gaurav Kohli wrote:
>> On 12/24/2025 2:27 PM, Krzysztof Kozlowski wrote:
>>> On 23/12/2025 13:32, Gaurav Kohli wrote:
>>>> The cooling subnode of a remoteproc represents a client of the Thermal
>>>> Mitigation Device QMI service running on it. Each subnode of the cooling
>>>> node represents a single control exposed by the service.
>>>>
>>>> Add maintainer name also and update this binding for cdsp substem.
>>>>
>>>> Co-developed-by: Casey Connolly <casey.connolly@...aro.org>
>>>> Signed-off-by: Gaurav Kohli <gaurav.kohli@....qualcomm.com>
>>>> Signed-off-by: Casey Connolly <casey.connolly@...aro.org>
>>>> ---
>>>>    .../bindings/remoteproc/qcom,pas-common.yaml  |  6 ++
>>>>    .../bindings/thermal/qcom,qmi-cooling.yaml    | 99 +++++++++++++++++++
>>>>    2 files changed, 105 insertions(+)
>>>>    create mode 100644 Documentation/devicetree/bindings/thermal/qcom,qmi-cooling.yaml
>>>>
>>>> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,pas-common.yaml b/Documentation/devicetree/bindings/remoteproc/qcom,pas-common.yaml
>>>> index 63a82e7a8bf8..bbc82253f76b 100644
>>>> --- a/Documentation/devicetree/bindings/remoteproc/qcom,pas-common.yaml
>>>> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,pas-common.yaml
>>>> @@ -77,6 +77,12 @@ properties:
>>>>          and devices related to the ADSP.
>>>>        unevaluatedProperties: false
>>>>    
>>>> +  cooling:
>>>> +    $ref: /schemas/thermal/qcom,qmi-cooling.yaml#
>>>> +    description:
>>>> +      Cooling subnode which represents the cooling devices exposed by the Modem.
>>>> +    unevaluatedProperties: false
>>>> +
>>>>    required:
>>>>      - clocks
>>>>      - clock-names
>>>> diff --git a/Documentation/devicetree/bindings/thermal/qcom,qmi-cooling.yaml b/Documentation/devicetree/bindings/thermal/qcom,qmi-cooling.yaml
>>>> new file mode 100644
>>>> index 000000000000..90b46712d241
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/thermal/qcom,qmi-cooling.yaml
>>>> @@ -0,0 +1,99 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>>> +# Copyright 2023 (c), Linaro Limited
>>>> +
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/thermal/qcom,qmi-cooling.yaml#
>>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>>> +
>>>> +title: Qualcomm QMI based thermal mitigation (TMD) cooling devices.
>>>> +
>>>> +maintainers:
>>>> +  - Caleb Connolly <caleb.connolly@...aro.org>
>>>> +  - Gaurav Kohli <gaurav.kohli@....qualcomm.com>
>>>> +
>>>> +description:
>>>> +  Qualcomm QMI-based TMD cooling devices are used to mitigate thermal conditions
>>>> +  across multiple remote subsystems. These devices operate based on junction temperature
>>>> +  sensors (TSENS) associated with thermal zones for each subsystem.
>>>> +
>>>> +  Each subnode corresponds to a control interface for a single instance of the TMD
>>>> +  service running on a remote subsystem.
>>>> +
>>>> +definitions:
>>> defs, look at other code
>>>
>>>
>>>> +  tmd:
>>>> +    type: object
>>>> +    description: |
>>>> +      A single Thermal Mitigation Device exposed by a remote subsystem.
>>> Missing proper formatting. Please do not send us code written by LLM.
>>
>> This patch is based on older series
>>
>> https://lore.kernel.org/linux-devicetree/20230905-caleb-qmi_cooling-v1-0-5aa39d4164a7@linaro.org/, did some manual changes to remove unusable code.
> How? This is v1, not v2. How did you address other comments? Where did
> you provide proper changelog? Why this is not correctly versioned/
>
>> let me fix the formatting. This is not generated code.
> I do not believe, because this:
>
>
>>>> +      phandle: true


As i have mentioned in earlier reply, we are including below series:

https://lore.kernel.org/linux-devicetree/20230905-caleb-qmi_cooling-v1-0-5aa39d4164a7@linaro.org/,) 
as this is client for remote proc cooling.
I was seeing this error while using older yam files.

('cdsp_sw' was unexpected)

from schema qcom,qmi-cooling.yaml

So to avoid that, i have added phandle to avoid this error. will fix 
this in proper way
by including another yaml file which will define the cdsp_sw,

Below is the dt node:
cooling {
+                compatible = "qcom,qmi-cooling-cdsp";
+                    cdsp_sw: cdsp_sw {
+                        label = "cdsp_sw";
+                        #cooling-cells = <2>;
+                    };
+            };


> Does not exist. You cannot come with something like that, there is no
> such code.
>
> Only LLM when parsing DTB could invent something like this. Otherwise
> explain me please the process leading to coming to such change.
>
> Best regards,
> Krzysztof