CPU and GPU temperature sensors exported as thermal zones only

In 5.10, the CPU and GPU temperature sensors are exported as thermal zones (under /sys/devices/virtual/thermal) together with a properly configured cooling device. This is much appreciated, since the board no longer reboots under load, and there is no need to manually throttle the CPU.

On the other hand, the sensors are no longer visible to the usual userspace monitoring tools, such as the sensors command-line utility. It is my (perhaps incorrect) understanding that solving this is a matter of exporting the sensors under /sys/class/hwmon in addition to the existing thermal zones.

Please consider this feature request as having low priority: the current thermal support is great (it has solved all of my problems with boards rebooting in the middle of demos), having the sensors visible to standard monitoring tools would just be a welcome extra.

This is related to https://www.olimex.com/forum/index.php?topic=8142.0 and https://www.olimex.com/forum/index.php?topic=8111.0

Start by tracing how the 5.10 CPU and GPU sensors are exposed under /sys/devices/virtual/thermal and how the cooling device is configured. Compare that exposure with the /sys/class/hwmon interface used by the sensors command-line utility. Done means the sensors are visible to standard monitoring tools while the existing thermal zones and cooling behavior remain intact.