Hello. I have a question about changing the CPU frequency.
Now, my customer is using jb4.2.2_1.1.0 and default CPU freq is 792MHz.
We want to change the CPU freq from 792MHz to 996MHz.
We tried to change the kernel parameter from arm_freq=800 to arm_freq=1000.
But, Warning log was repeated.
- COULD NOT SET SOC VOLTAGE BACK!!!!
- COULD NOT SET PU VOLTAGE!!!!
The error was outputted at the function of "function set_cpu_freq" under 'kernel_imx/src/arch/arm/plat-mxc/cpufreq.c'.
Maybe, it looks internal LDOs setting error.
How should one change the CPU freq in U-boot?