CPU

1 S5P4418/S5P6818 降低CPU频率

1.1 Method 1

The following command is used to temporarily limit the maximum CPU frequency to 1GHz: echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

1.2 Method 2

Modify the kernel source code: arch/arm/plat-s5p4418/nanopi2/device.c

Delete the unwanted frequencies in the following array: static unsigned long dfs_freq_table[][2] = {

   { 1400000, 1200000, },
   { 1200000, 1120000, },
   { 1000000, 1040000, },
   {  800000, 1000000, },
   {  700000,  940000, },
   {  600000,  940000, },
   {  500000,  940000, },
   {  400000,  940000, },

};