CPU Temperature

Reading the SOC Temperature

The NXP i.MX8QM SOC has an internal temperature sensor that can be read. The temperature is reported in millidegrees Celsius:

SOC Thermal Zones

root@neuralplex:~# cat /sys/class/thermal/thermal_zone0/temp
43000

Thermal Setpoints

The Linux kernel will throttle the CPU and GPU based on setpoints configured in the Linux device tree.

The following demonstrates how to read the setpoints for the NeuralPlex:

SOC Temperatures

root@neuralplex:~# cat /sys/class/thermal/thermal_zone0/trip_point_0_temp
110000
root@neuralplex:~# cat /sys/class/thermal/thermal_zone0/trip_point_1_temp
125000