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imx8mq CPU Temperature

Question asked by bineyamtafesse on Apr 3, 2019
Latest reply on Apr 19, 2019 by bineyamtafesse

I am running the following configuratoin
CPU: imx8mq (custom PCB)

Linux OS: Linux 4.9.123 

 

I noticed the TMU generated temperature exceeded warnings and cutoff on power up. The critical temperature limit of 95C was tripped (the processors were nowhere near this temperature). I modified the trip-temperature to 125C and the device boots through u-boot and kernel and functions as intended (and has been working for weeks).  Now, increasing the temperature is a temporary solution.  What is the expectation in terms of calibration? I see there is a definition in the u-boot under "tmu" that looks like a calibration table.  Is the expectation that we calibrate every unit?

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