Raspberry Pi 1B cpu scaling

[basti <mailinglist@unix-solution.de>]

Hello,

I have installed the 20220121_raspi_1_bullseye.img.xz image from 
https://raspi.debian.net/tested-images/
on one of my old Raspberry Pi 1B.

As I can see cpu scaling seems to not work.

|I have to load the kernel model.

root@counter:~# lsmod | grep cpu
cpufreq_ondemand       16384  0

/sys/devices/system/cpu/cpu/X//cpufreq/scaling_max_freq is not available 
so I compile vcgencmd to test it.

|root@counter:~# vcgencmd measure_clock arm
frequency(48)=700000000

Is always 700 Mhz, also when I try to stress the Pi with "stress --cpu 2 
--timeout 60s".

root@counter:~# vcgencmd get_config int | grep freq
arm_freq=950
arm_freq_min=700
core_freq=250
sdram_freq=450
hdmi_pixel_freq_limit:0=0x9a7ec80

So the next step I have try is to increase arm_freq_min to 800.
After reboot
root@counter:~# vcgencmd measure_clock arm
frequency(48)=800000000

So I verify that vcgencmd show the correct value.

Can someone reproduce this?
Why did cpu scaling not work on pi1 ?

Best Regards