./flash_sd.sh

setup

tools/upgrade_tool ul $(ls | grep RK3288UbootLoader) || exit 1
tools/rkflashtool P < parameters.txt || exit 1
tools/rkflashtool w kernel < kernel.img || exit 1
tools/rkflashtool w boot < boot.img || exit 1

analyzing CPU 3:
  driver: cpufreq-dt
  CPUs which run at the same hardware frequency: 0 1 2 3
  CPUs which need to have their frequency coordinated by software: 0 1 2 3
  maximum transition latency: 115 us.
  hardware limits: 126 MHz - 1.61 GHz
  available frequency steps: 126 MHz, 216 MHz, 312 MHz, 408 MHz, 600 MHz, 696 MHz, 816 MHz, 1.01 GHz, 1.20 GHz, 1.42 GHz, 1.51 GHz, 1.61 GHz
  available cpufreq governors: conservative, userspace, ondemand, performance
  current policy: frequency should be within 126 MHz and 1.61 GHz.
                  The governor "ondemand" may decide which speed to use
                  within this range.
  current CPU frequency is 1.61 GHz.
  cpufreq stats: 126 MHz:0.07%, 216 MHz:25.73%, 312 MHz:25.46%, 408 MHz:1.11%, 600 MHz:1.04%, 696 MHz:0.99%, 816 MHz:1.62%, 1.01 GHz:1.82%, 1.20 GHz:1.57%, 1.42 GHz:1.24%, 1.51 GHz:0.60%, 1.61 GHz:38.76%  (5004)