Re: Thermal driver with safeguards

[Werner Sembach]

Hi Rafael,

Am 02.12.24 um 15:52 schrieb Werner Sembach:
> Hi,
>
> given a pair of a temperature sensor and a fan, I want to implement a driver. 
> that allows userspace to directly control the fan if it wants to. But have a 
> minimum fan speed when certain high temperatures are reached to avoid crashes 
> or hardware damage.
>
> e.g.
>
> - temperature of target die is 80°C -> fan speed must be at least 30%
>
> - temperature of target die is 90°C -> fan speed must be at least 40%
>
> - temperature of target die is 105°C -> fan speed must be 100%
>
> - temperature of target die is 110°C -> device shuts off to protect the hardware
>
> Would the thermal subsystem be the right place for this to implement this 
> protection in driver?
>
> It already has functions around periodic temperature polling and trip points.
>
> Kind regards,
>
> Werner Sembach
Sorry for bumping, just wanted to make sure that it doesn't get lost because of 
the holidays, as the question is still relevant for me for rewriting and 
upstreaming tuxedo-drivers.

Best regards,

Werner