On 4/19/22 11:24, Nicolas Dufresne wrote:
Hi,
adding linux-hwmon in CC for a wider feedback.
Le vendredi 15 avril 2022 à 13:18 +0200, Benjamin Mugnier a écrit :
Add V4L2_CID_TEMPERATURE control to get temperature from sensor in
celsius as a volatile and read-only control, and its documentation.
Useful to monitor thermals from v4l controls for sensors that support
this.
Any justification to expose a temperature sensor outside of the dedicated kernel
API hwmon ? I know if may makes it harder to use, as the sensor isn't bound to
the camera driver, and also the sensor may not work if the camera is not
streaming. But in the end, the API in hwmon does not look that complex, and is
perhaps more precise ?
All in all, I think we need a strong justification to implement a custom
thermometer interface, something described here and documented with care to
prevent abuse. I would also see opinion from folks outside of the linux-media,
hence why I have CCed hwmon mailing list.
All I can say is that this seems to be odd and a bit outside the scope of
v4l2. I would have expected the vgxy61 driver to register a hwmon device
instead.
Guenter
