Hi All,
I started testing frequency mentioned in OPP table with M3-W1.1 Salvator-X board (NOT salvator-XS) using user space governor
The actual frequency reported for 0.5GHz(500000 KHz) is too much deviated from the target frequency
[INFO] Target frequency: 500000 KHz
[INFO] Actual frequency: 421874 KHz
But if I change the extal value, as per the board schematic (16.6666MHz), the value is some what closer to target frequency.
&extal_clk {
- clock-frequency = <16666666>;
+ clock-frequency = <16666600>;
};
[INFO] Target frequency: 500000 KHz
[INFO] Actual frequency: 468748 KHz
Q1) Have any one seen this issue? Please share your thoughts on this issue.
Note:-
I am not seeing this issue on Salvator-XS board, where the extal_clk value= 16640000(16.64MHz).
Please see the logs
with clock-frequency = <16666666>;
-----------------------------------------------
root@salvator-x:/cip-test-scripts# ./opp_t_001.sh
[INFO] Testing cpufreq for policy:
[INFO] /sys/devices/system/cpu/cpufreq/policy0
[INFO]
[INFO] CPUs affected:
[INFO] 0 1
[INFO]
[INFO] Available frequencies:
[INFO] 500000 1000000 1500000
[INFO]
[INFO] Target frequency: 500000 KHz
[INFO] Actual frequency: 421874 KHz
[INFO]
[INFO] Target frequency: 1000000 KHz
[INFO] Actual frequency: 937499 KHz
[INFO]
[INFO] Target frequency: 1500000 KHz
[INFO] Actual frequency: 1499999 KHz
[INFO]
[INFO] Testing cpufreq for policy:
[INFO] /sys/devices/system/cpu/cpufreq/policy2
[INFO]
[INFO] CPUs affected:
[INFO] 2 3 4 5
[INFO]
[INFO] Available frequencies:
[INFO] 800000 1000000 1200000
[INFO]
[INFO] Target frequency: 800000 KHz
[INFO] Actual frequency: 749999 KHz
[INFO]
[INFO] Target frequency: 1000000 KHz
[INFO] Actual frequency: 974999 KHz
[INFO]
[INFO] Target frequency: 1200000 KHz
[INFO] Actual frequency: 1199999 KHz
With clock-frequency = <16666600>
----------------------------------------------
root@salvator-x:/cip-test-scripts# ./opp_t_001.sh
[INFO] Testing cpufreq for policy:
[INFO] /sys/devices/system/cpu/cpufreq/policy0
[INFO]
[INFO] CPUs affected:
[INFO] 0 1
[INFO]
[INFO] Available frequencies:
[INFO] 500000 1000000 1500000
[INFO]
[INFO] Target frequency: 500000 KHz
[INFO] Actual frequency: 468748 KHz
[INFO]
[INFO] Target frequency: 1000000 KHz
[INFO] Actual frequency: 937496 KHz
[INFO]
[INFO] Target frequency: 1500000 KHz
[INFO] Actual frequency: 1499994 KHz
[INFO]
[INFO] Testing cpufreq for policy:
[INFO] /sys/devices/system/cpu/cpufreq/policy2
[INFO]
[INFO] CPUs affected:
[INFO] 2 3 4 5
[INFO]
[INFO] Available frequencies:
[INFO] 800000 1000000 1200000
[INFO]
[INFO] Target frequency: 800000 KHz
[INFO] Actual frequency: 787496 KHz
[INFO]
[INFO] Target frequency: 1000000 KHz
[INFO] Actual frequency: 974996 KHz
[INFO]
[INFO] Target frequency: 1200000 KHz
[INFO] Actual frequency: 1199995 KHz
Regards,
Biju
