mrxbox Posted January 31, 2018 Posted January 31, 2018 i input this command echo -n "userspace" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor echo -n "1536000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed after,check cpu freq cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq but it still display 120000 anybody can help me?
chrisf Posted January 31, 2018 Posted January 31, 2018 You'll probably need to update the DVFS table in the device tree. That's how the cpufreq driver knows what voltage to set for the corresponding frequency.
mrxbox Posted February 1, 2018 Author Posted February 1, 2018 i am not familiar with linux , can you how to do detail describe ? thanks a lot
chwe Posted February 1, 2018 Posted February 1, 2018 IMHO, if you are not familiar it might be a bad idea to overclock your H3 CPU... It depends on kernel and board (voltageregulation is solved in two ways on H3). Is it just to see what's possible or do you want to get the max. power out of it? If the second is the case, I think you waste your time. This might be a good starting point for you. http://linux-sunxi.org/Cpufreq 1
mrxbox Posted February 2, 2018 Author Posted February 2, 2018 That is mean if I want overclock allwinner H3 cpu, I cant use command todo, must compile the kernel? uh... maybe it's impossible for me thank you for your reply
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