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DFS, CPU idle on LS1021a-twr

Question asked by Dennis Wokke on Sep 22, 2015
Latest reply on Oct 28, 2015 by Dennis Wokke

Dear all,

 

I have been busy trying to make DFS possible using the QorIQ-SDK-V1.8.

Goal is to save as much power as possible when running idle using the LS1021a-TWR development kit.

 

I made a minimal build (fsl-image-minimal). I updated the U-boot ( U-Boot 2015.01+ls1+g6ba8eed (Sep 07 2015 - 14:03:16)) and RCW and started linux using the ramdisk deployment.

This al worked. Setting the CPU cores to USERSPACE made it possible to set frequencies to 250, 500 or 1000MHz.

 

The problem is that I don't see any change in power consumption when changing the frequency.

 

Is there anybody in the community that has tried this and succeeded?

Any help is greatly appreciated.

 

Best regards,

Dennis

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