linux-kernel - Re: [PATCH v3 3/3] dt-bindings: thermal: Add yaml bindings for thermal zones

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Message-ID: <693bda26-1eed-a886-2ce0-7b3a2ca410d2@linaro.org>
Date:   Mon, 30 Mar 2020 15:07:53 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Amit Kucheria <amit.kucheria@...durent.com>,
        Lukasz Luba <lukasz.luba@....com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Linux PM list <linux-pm@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 3/3] dt-bindings: thermal: Add yaml bindings for
 thermal zones


Hi Amit,

On 30/03/2020 12:34, Amit Kucheria wrote:

[ ... ]

>>> I don't know why it's not consistent with the actual code in
>>> of-thermal.c, where there is even a comment stated: /* For now,
>>> thermal framework supports only 1 sensor per zone */
>>>
>>> I think this is the place where developers should be informed
>>> about the limitation and not even try to put more sensors into
>>> the list.
>>
>> That is a good point. I'm currently "porting" the existing
>> binding as described in thermal.txt to yaml. If you look at some
>> of the example (c) in there, the bindings allow many sensors to a
>> zone mapping but the thermal core doesn't implement that
>> functionality.
>>
>> So should we fix the core code or change the bindings? Thoughts -
>> Rob, Daniel, Rui?
>
> Rob, Daniel: Any comments? We don't have any concerns for Linux
> backward compatibility since multiple sensors per zone isn't used
> anywhere. But asking since bindings are supposed to be
> OS-agnostic.

IMO, we should remove it as it is not used anywhere.

We still have to decide how we aggregate multiple sensors.


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