Hi NXP,
I have an LS1043A RDB. Its SD slot has a bootable SD card that contained a default BSP image. On start-up, u-boot reports the SoC's quad cores are at 1.6 GHz.
After the boot process has completed, I used the following command to check the CPU frequency.
root@ls1043ardb:/sys/devices/system/cpu/cpu0/cpufreq# cat cpuinfo_cur_freq
500000
root@ls1043ardb:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_cur_freq
500000
I then used the following command to check available CPU frequencies.
root@ls1043ardb:/sys/devices/system/cpu/cpu0/cpufreq# cat scaling_available_frequencies
1600000 1000000 800000 500000
I wanted to set the frequency to maximum. I tried the following command and found it futile.
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
I tried the procedure described in
CPU Frequency Switching User Manual | QorIQ SDK v2.0-1703 Documentation | NXP Semiconductors
and found the frequency remained unchanged (@ 500000). Setting "scaling_speed" appears to be useless.
I was wondering what had to be done to set the CPU frequency to 1.6 GHz.
Thank you so much,
Dawei
[Reference 1]
U-Boot 2021.04-ge2eba0cd58 (Aug 27 2021 - 22:19:59 +0800)
SoC: LS1043AE Rev1.1 (0x87920011)
Clock Configuration:
CPU0(A53):1600 MHz CPU1(A53):1600 MHz CPU2(A53):1600 MHz
CPU3(A53):1600 MHz
Bus: 400 MHz DDR: 1600 MT/s FMAN: 500 MHz
Reset Configuration Word (RCW):
00000000: 08100010 0a000000 00000000 00000000
00000010: 14550002 80004012 60040000 c1002000
00000020: 00000000 00000000 00000000 00038800
00000030: 00000000 00001100 00000096 00000001
