[PATCH v7 4/4] thermal: mediatek: add another get_temp ops for thermal sensors

[Amjad Ouled-Ameur]

On 1/24/23 17:54, Daniel Lezcano wrote:
>
> Hi Amjad,
>
> On 24/01/2023 11:08, Amjad Ouled-Ameur wrote:
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> [ ... ]
>
>>>>
>>>> IIUC, there is a sensor per couple of cores. 1 x 2Bigs, 1 x 2Bigs, 1 x 4 Little, right ?
>>>
>>> MT8365 SoC has 4 x A53 CPUs. The SoC has 4 thermal zones per sensor. Thermal zone 0 corresponds
>>>
>>> to all 4 x A53 CPUs, the other thermal zones (1, 2 and 3) has nothing to do with CPUs. The cooling device type
>>>
>>> used for CPUs is passive. FYI, thermal zones 1, 2 and 3 are present in the SoC for debug-purpose only, they are not supposed
>>>
>>> to be used for production.
>>>
>> After reconsidering the fact that zones 1, 2 and 3 are only used for dev/debug, it might be best to avo >
>> aggregation as you suggested, and keep only support for zone 0 in this driver. Thus I suggest I send a V8
>>
>> where I keep only below fixes for this patch if that's okay with you:
>>
>> - Define "raw_to_mcelsius" function pointer for "struct thermal_bank_cfg".
>>
>> - Fix "mtk_thermal" variable in mtk_read_temp().
>>
>> - Set "mt->raw_to_mcelsius" in probe().
>>
>>
>> For zones 1, 2 and 3 we can later add a different driver specific for dev/debug to probe them to
>>
>> avoid confusion.
>
> You can add them in the driver and in the device tree, but just add the cooling device for the thermal zone 0.

Thermal zone 0 uses CPU{0..3} for passive cooling, in this case we should register cooling device with

cpufreq_cooling_register() for each CPU right ?

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