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

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Date:   Tue, 06 Dec 2022 10:18:14 +0100
From:   "Amjad Ouled-Ameur" <aouledameur@...libre.com>
To:     "Daniel Lezcano" <daniel.lezcano@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Amit Kucheria" <amitk@...nel.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Zhang Rui" <rui.zhang@...el.com>
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 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 ?

Regards,
Amjad
>
>
> -- 
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