We are using iMX6 Solo Industrial Grade Processors in our custom iMX6 board. We have done temperature chamber testing and noticed the following issue
1. When the ambient temperature reaches >75 degree Celcius, the iMX6 processor is turned off with the following messages:
Broadcast message from root@imx6s (Wed Oct 7 13:05:14 2015):
The system is going down for system halt NOW!
thermal thermal_zone0: critical temperature reached(100 C),shutting down
We are not doing much work (simple file copying, ethernet pinging) but still the processor is turned off. It seems the Linux thermal governor for iMX6 is configured for 100C die temperature as 'Critical'.
But my question is, if the processor is marked as Industrial Grade, it should operate at ambient temperature of upto 85C. But it is shutting down at ambient temperature of 75C. It would be great if people from freescale can comment on this