kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_ARM_EXYNOS5_BUS_DEVFREQ.
Result is shown for kernelversion 5.8.6

ARM Exynos5250 Bus DEVFREQ Driver

modulename: exynos_ppmu.ko
configname: CONFIG_ARM_EXYNOS5_BUS_DEVFREQ

Linux Kernel Configuration
└─> Device Drivers
└─> Generic Dynamic Voltage and Frequency Scaling (DVFS) support
└─> ARM Exynos5250 Bus DEVFREQ Driver

This adds the DEVFREQ driver for Exynos5250 bus interface (vdd_int).
It reads PPMU counters of memory controllers and adjusts the
operating frequencies and voltages with OPP support.


source code:


drivers/devfreq/exynos/