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Title: Missing CPU frequencies [Print This Page]

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Author: crashoverride    Time: 6/27/2017 01:58
Title: Missing CPU frequencies
The top operating frequencies for both big and little cores appear to be missing:

1. firefly@firefly:~$ cat /sys/devices/system/cpu/cpu4/cpufreq/scaling_available_frequencies
   
2. 408000 600000 816000 1008000 1200000 1416000 1608000 1800000
   
3. firefly@firefly:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
   
4. 408000 600000 816000 1008000 1200000 1416000

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The device tree indicates the support here:
https://gitlab.com/TeeFirefly/li ... 9-opp.dtsi#L133-137

1.                 opp@1992000000 {
   
2.                         opp-hz = /bits/ 64 <1992000000>;
   
3.                         opp-microvolt = <1225000>;
   
4.                         clock-latency-ns = <40000>;
   
5.                 };
   

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https://gitlab.com/TeeFirefly/li ... 399-opp.dtsi#L81-85

1. 
   
2.                 opp@1512000000 {
   
3.                         opp-hz = /bits/ 64 <1512000000>;
   
4.                         opp-microvolt = <1125000>;
   
5.                 clock-latency-ns = <40000>;
   
6.                         };
   

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Are these frequencies omitted because they are unstable or due to an oversight?

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Author: isle    Time: 6/27/2017 10:35
if you  update  the kernel/resource  image by making it  yourself  ,then the missing part will show up.

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Author: crashoverride    Time: 6/27/2017 22:43
Using the latest kernel does provide the missing frequencies.  I also confirmed a performance increase when using the frequencies.

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