IMX8M Plus "cpufreq" not function yocto version L5.9.10-gategarth & L5.9.72-hardknott

[sam_n]

Hi,

I have the same issue as described in the following https://community.nxp.com/t5/i-MX-Processors/How-to-enable-cpufreq-in-Linux-imx8mmevk-5-10-35-lts-Ha..., but on IMX8M Plus

Kernel configuration:

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_GOV_ATTR_SET=y
CONFIG_CPU_FREQ_GOV_COMMON=y
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y
CONFIG_CPU_FREQ_GOV_SCHEDUTIL=y

#
# CPU frequency scaling drivers
#
CONFIG_CPUFREQ_DT=y
CONFIG_CPUFREQ_DT_PLATDEV=y
CONFIG_ACPI_CPPC_CPUFREQ=m
CONFIG_ARM_SCPI_CPUFREQ=y
CONFIG_ARM_IMX_CPUFREQ_DT=y
CONFIG_QORIQ_CPUFREQ=y
# end of CPU Frequency scaling

/sys/devices/system/cpu/cpufreq/ directory is empty

# ls -all /sys/devices/system/cpu/cpufreq/ 
drwxr-xr-x 2 root root 0 Sep 20 11:23 . 
drwxr-xr-x 12 root root 0 Sep 20 10:16 ..

It`s working in L5.4.70-zeus, but not in L5.9.10-gategarth & L5.9.72-hardknott.

Please advice?

Thanks.

[Bio_TICFSL]

Hello Sam_n,

Take in mind that those version of the kernel are not LTS using by NXP BSP, you can use 5.10.72 where you can find the cpufreq on it.

Regards

[Anatoly_K]

Hi, thank you for quick response!

We work together with Sam_n. One wording correction in original post.

We verified versions IMX8MP L5.10.9-gategarth & L5.10.72-hardknott.

The issue still exists (see output below).

# ls /sys/devices/system/cpu/cpufreq
#

And as mentioned on L5.4.70-zeus all work as expected (see output below).

# ls /sys/devices/system/cpu/cpufreq/
ondemand policy0
#

Please advise.

Regards, Anatoly_K