AnsweredAssumed Answered

About the Thermal driver on AndroidKK4.4.3 for MX6Q_SABRE-SDB

Question asked by yuuki on Oct 5, 2015
Latest reply on Oct 7, 2015 by igorpadykov

Dear all,

We test AndroidKK4.4.3 in MX6Q_SABRE-SDB


When CPU load increases, case temperature repeats 92 degrees Celsius and 82 degrees Celsius.

I understand that AndroidKK4.4.3 has Thermal driver.
I referred to the following. Each parameter was as follows.
(I used a cat command.)




temp   ===> 34918
trip_point_0_temp ===> 85000
trip_point_0_type ===> passive
trip_point_1_temp ===> 100000
trip_point_1_type ===> critical


I understand that frequency of CPU and GPU are decreased when the temperature of the CPU reached 85 degrees Celsius.

I was able to change a value of trip_point_0_temp by using echo command.


   echo 90000 > /sys/devices/virtual/thermal/thermal_zone0/trip_point_0_temp


However, I do not understand the change method of the frequency value of CPU and GPU.
Would you tell me the method to set the decreased the frequency of CPU and GPU?


Best Regards,