DietPi-Config | Allow to change max CPU frequency via device tree overlays

[BenshHD]

Creating a bug report/issue

Required Information

• DietPi version | G_DIETPI_VERSION_CORE=7 G_DIETPI_VERSION_SUB=0 G_DIETPI_VERSION_RC=0 G_GITBRANCH='beta' G_GITOWNER='MichaIng'
• Distro version | 10.8
• Kernel version | Linux DietPi 5.10.16-rockchip64 #21.02.2 SMP PREEMPT Sun Feb 14 21:35:01 CET 2021 aarch64 GNU/Linux
• SBC model | ROCKPro64 (aarch64)
• Power supply used | Factory power suply
• SDcard used | 16G eMMC Storage

Additional Information (if applicable)

Steps to reproduce

1.The max frequency is missing... i had the option for 2108000 mhz but with the update to the latest dietpi, it is now missing and the max is 1800000 mhz

Expected behaviour

• I would like to get my performance back... It was a factory frequency no custom set one.

Actual behaviour

• The max now is 1.8ghz and the system is noticeably slower. A bevore 11.3 min process is now taking 12.85 min

Extra details

• the frequency is missing in the scaling_available_frequencies

[MichaIng]

Many thanks for your report.

There have been quite some reports about unstable RK3399 systems since Armbian shipped the kernel with by default overlocked frequencies. So I guess they now lowered the default to how the manufacturers kernels/images ship it.

I checked how overclocking is now implemented. It's a device tree overlay. So please try to add rk3399-opp-2ghz to the overlays= line (in case create it) in /boot/armbianEnv.txt. Read more about it in /boot/dtb/rockchip/overlay/README.rockchip-overlays.