From: Alexandre Bailon <abailon@baylibre.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>,
rui.zhang@intel.com, amitk@kernel.org
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
ben.tseng@mediatek.com, khilman@baylibre.com, mka@chromium.org
Subject: Re: [PATCH v2 0/2] Add a generic virtual thermal sensor
Date: Mon, 20 Sep 2021 15:12:20 +0200 [thread overview]
Message-ID: <c395abad-598b-c06a-9252-c8e62c977188@baylibre.com> (raw)
In-Reply-To: <8a9e5f13-6253-2d0d-35a8-789090af4521@linaro.org>
On 9/17/21 4:03 PM, Daniel Lezcano wrote:
> On 17/09/2021 15:33, Alexandre Bailon wrote:
>> Hi Daniel,
>>
>> On 9/17/21 2:41 PM, Daniel Lezcano wrote:
>>> On 17/09/2021 09:27, Alexandre Bailon wrote:
>>>> This series add a virtual thermal sensor.
>>>> It could be used to get a temperature using some thermal sensors.
>>>> Currently, the supported operations are max, min and avg.
>>>> The virtual sensor could be easily extended to support others
>>>> operations.
>>>>
>>>> Note:
>>>> Currently, thermal drivers must explicitly register their sensors to
>>>> make them
>>>> available to the virtual sensor.
>>>> This doesn't seem a good solution to me and I think it would be
>>>> preferable to
>>>> update the framework to register the list of each available sensors.
>>> Why must the drivers do that ?
>> Because there are no central place where thermal sensor are registered.
>> The only other way I found was to update thermal_of.c,
>> to register the thermal sensors and make them available later to the
>> virtual thermal sensor.
>>
>> To work, the virtual thermal need to get the sensor_data the ops from
>> the thermal sensor.
>> And as far I know, this is only registered in thermal_of.c, in the
>> thermal zone data
>> but I can't access it directly from the virtual thermal sensor.
>>
>> How would you do it ?
> Via the phandles when registering the virtual sensor ?
As far I know, we can't get the ops or the sensor_data from the phandle
of a thermal sensor.
The closest solution I found so far would be to aggregate the thermal
zones instead of thermal sensors.
thermal_zone_device has the data needed and a thermal zone could be find
easily using its name.
But, using a thermal_zone_device, I don't see how to handle module
unloading.
Thanks,
Alexandre
> Or is the problem you are mentioning related to the sensor module
> loading after the virtual sensor ?
>
next prev parent reply other threads:[~2021-09-20 13:10 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 7:27 [PATCH v2 0/2] Add a generic virtual thermal sensor Alexandre Bailon
2021-09-17 7:27 ` [PATCH v2 1/2] dt-bindings: Add bindings for the " Alexandre Bailon
2021-09-17 7:27 ` [PATCH v2 2/2] thermal: add a virtual sensor to aggregate temperatures Alexandre Bailon
2021-10-07 16:38 ` Rafael J. Wysocki
2021-10-07 17:33 ` Rafael J. Wysocki
2021-10-09 14:46 ` Rafael J. Wysocki
2021-10-25 9:18 ` Alexandre Bailon
2021-09-17 12:41 ` [PATCH v2 0/2] Add a generic virtual thermal sensor Daniel Lezcano
2021-09-17 13:33 ` Alexandre Bailon
2021-09-17 14:03 ` Daniel Lezcano
2021-09-20 13:12 ` Alexandre Bailon [this message]
2021-09-22 8:10 ` Daniel Lezcano
2021-10-04 10:24 ` Alexandre Bailon
2021-10-04 13:42 ` Daniel Lezcano
2021-10-05 16:45 ` Rafael J. Wysocki
2021-10-06 16:06 ` Daniel Lezcano
2021-10-06 18:00 ` Rafael J. Wysocki
2021-10-06 19:51 ` Daniel Lezcano
2021-10-07 14:17 ` Rafael J. Wysocki
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