Setting mx8mq frequency lower than 800MHz

[alexandru_costa]

Hi,

Is it possible to clock the mx8mq lower than 800MHz? By default the governor only allows for choosing between 1 and 1.5GHz

By editing the grades in imx8mqevk/kernel-source/drivers/soc/imx/soc-imx8.c it now allows setting the cpu freq as low as 800Mhz.

Would it be possible to clock it lower than that and if yes, can you help with an example for Kernel 4.14.98?

Thank you

[igorpadykov]

Hi alexandru_costa

one can try to tweak dts "&A53_0 { operating-points.."

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/fsl-imx8mq-e...

and use CPU Frequency Scaling (CPUFREQ) Linux Chapter of Reference Manual in

Documentation

Best regards
igor