Re: [PATCH v1 1/1] thermal: imx: implement runtime PM support

[Daniel Lezcano <daniel.lezcano@linaro.org>]

On 19/10/2021 13:51, Oleksij Rempel wrote:
> Hi Daniel,
> 
> On Tue, Oct 19, 2021 at 01:04:46PM +0200, Daniel Lezcano wrote:
>> On 24/09/2021 13:50, Oleksij Rempel wrote:
>>> Starting with commit d92ed2c9d3ff ("thermal: imx: Use driver's local
>>> data to decide whether to run a measurement") this driver stared using
>>> irq_enabled flag to make decision to power on/off the thermal core. This
>>> triggered a regression, where after reaching critical temperature, alarm
>>> IRQ handler set irq_enabled to false,  disabled thermal core and was not
>>> able read temperature and disable cooling sequence.
>>>
>>> In case the cooling device is "CPU/GPU freq", the system will run with
>>> reduce performance until next reboot.
>>>
>>> To solve this issue, we need to move all parts implementing hand made
>>> runtime power management and let it handle actual runtime PM framework.
>>>
>>> Fixes: d92ed2c9d3ff ("thermal: imx: Use driver's local data to decide whether to run a measurement")
>>> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
>>
>> Thanks for this fix.
>>
>> Petr or Oleksij,
>>
>> could you confirm it is tested and working without CONFIG_PM ?
> 
> Petr was right, no it is not working without PM.
Ok, thanks.

I suppose the fix is related to the initialization of the sensor which
should be enabled with/out pm_runtime, right ?


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