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Good day to you all,
I have noticed that on the imx6 boards Cubox-i and Hummingboard, the
imx6q-coufreq module is not loaded automatically.
That leaves the system always running at 1GHz even though there is a
driver to bring it down to 400MHz.
Apparently, the cpufreq module is not to load on its own. Instead it
has to be builtin, or loaded by a system service at startup.
What is the proper way to do this? Can we make the driver builtin?
Or should there be some modules-load.d config file?
This I noticed on Tumbleweed. Below follows a quite useless console
log with loaded cpufreq module:
Welcome to openSUSE 20160109 "Tumbleweed" - Kernel 4.3.3-5-default
(ttymxc0).
linux login: root
Password:
Last login: Mon Jan 11 18:40:44 on ttymxc0
Have a lot of fun...
linux:~ # cpupower frequency-info
analyzing CPU 0:
driver: imx6q-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 0 1 2
3
maximum transition latency: 426 us.
hardware limits: 396 MHz - 996 MHz
available frequency steps: 396 MHz, 792 MHz, 996 MHz
available cpufreq governors: conservative, powersave, ondemand,
performance
current policy: frequency should be within 396 MHz and 996 MHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 996 MHz (asserted by call to hardware).
br
Josua Mayer
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