Re: [PATCH 2/3] thermal: qoriq_thermal: only enable supported sensors

[Peng Fan <peng.fan@oss.nxp.com>]

On 6/15/2023 10:53 AM, Sebastian Krzyszkowiak wrote:
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> On czwartek, 15 czerwca 2023 04:29:01 CEST Peng Fan wrote:
>> On 6/8/2023 3:10 AM, Daniel Lezcano wrote:
>>>
>>> [...]
>>>
>>> Ok, I misunderstood. I thought that was for failing registered thermal
>>> zone.
>>>
>>> Would enabling the site in ops->change_mode do the trick ?
>>
>> No. ops->change_mode not able to do the trick.
>>
>> devm_thermal_of_zone_register->thermal_zone_device_enable
>> ->thermal_zone_device_set_mode->__thermal_zone_device_update.part.0
>> ->__thermal_zone_get_temp
>>
>> The thermal_zone_device_set_mode will call change_mode, if return
>> fail here, the thermal zone will fail to be registered.
>>
>> Thanks,
>> Peng.
> 
> I think the idea is not to return a failure in ops->change_mode, but to move
> enabling the site in REGS_TMR/REGS_V2_TMSR register from
> qoriq_tmu_register_tmu_zone to ops->change_mode. 

But qoriq_tmu_register_tmu_zone will finally call ops->change_mode.

And it is per zone, so we not able to enable TMR_ME here.

This way the site will be
> enabled only for actually existing thermal zones, since those not described in
> the device tree won't reach thermal_zone_device_enable.

No. The TMR_ME is the gate for all sites.

Thanks,
Peng.
> 
> S.
> 
>