linux-kernel - Re: [PATCH v7 4/4] thermal: mediatek: add another get

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Date:   Mon, 26 Dec 2022 11:27:33 +0100
From:   Amjad Ouled-Ameur <aouledameur@...libre.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Fabien Parent <fparent@...libre.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Markus Schneider-Pargmann <msp@...libre.com>,
        linux-pm@...r.kernel.org, Rob Herring <robh@...nel.org>,
        Michael Kao <michael.kao@...iatek.com>,
        linux-kernel@...r.kernel.org, Hsin-Yi Wang <hsinyi@...omium.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v7 4/4] thermal: mediatek: add another get_temp ops for
 thermal sensors

Hi Daniel,

On 12/6/22 10:18, Amjad Ouled-Ameur wrote:
> Hi Daniel,
> On Mon Dec 5, 2022 at 8:39 PM CET, Daniel Lezcano wrote:
>> Hi Amjad,
>>
>>
>> On 05/12/2022 11:41, Amjad Ouled-Ameur wrote:
>>
>> [ ... ]
>>
>>>>> @@ -1161,11 +1197,24 @@ static int mtk_thermal_probe(struct platform_device *pdev)
>>>>>     
>>>>>     	platform_set_drvdata(pdev, mt);
>>>>>     
>>>>> -	tzdev = devm_thermal_of_zone_register(&pdev->dev, 0, mt,
>>>>> -					      &mtk_thermal_ops);
>>>>> -	if (IS_ERR(tzdev)) {
>>>>> -		ret = PTR_ERR(tzdev);
>>>>> -		goto err_disable_clk_peri_therm;
>>>>> +	for (i = 0; i < mt->conf->num_sensors + 1; i++) {
>>>>> +		tz = devm_kmalloc(&pdev->dev, sizeof(*tz), GFP_KERNEL);
>>>>> +		if (!tz)
>>>>> +			return -ENOMEM;
>>>>> +
>>>>> +		tz->mt = mt;
>>>>> +		tz->id = i;
>>>>> +
>>>>> +		tzdev = devm_thermal_of_zone_register(&pdev->dev, i, tz, (i == 0) ?
>>>>> +							     &mtk_thermal_ops :
>>>>> +							     &mtk_thermal_sensor_ops);
>>>> Here you use again the aggregation
>>> I addressed this concern in V6, could you please take a look and let me
>>> know what you think [0].
>>>
>>> [0]: https://lore.kernel.org/all/5eb0cdc2-e9f9-dd42-bf80-b7dcd8bcc196@baylibre.com/
>> May I misunderstanding but AFAICS, this patch is setting the
>> mtk_thermal_ops if the sensor id is zero. The get_temp is computing the
>> max temperature in this ops which is what we don't want to do.
> Correct, but I think that is out of scope of this patchset, as the current
> driver already uses mtk_thermal_ops for sensor 0. The focus of this patchset
> is to add support for the other sensors.
>
> Besides, what do you suggest as a clean implementation if the current one
> no longer meets thermal core requirements ?

Could you please address this ?


Kindly,

Amjad

> Regards,
> Amjad
>>
>> -- 
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