topic Re: configure cpu frequency to 800MHz for MC IMX6USEVM10AB in i.MX Processors

configure cpu frequency to 800MHz for MC IMX6USEVM10AB

shreeharsha_ind — Wed, 14 Apr 2021 13:08:11 GMT

Hi All,

Kindly help us configuring CPU frequency to 800MHZ in kernel for MC IMX6USEVM10AB. However currently we see the frequency value to be at 1GHz.

Regards,

Shree

Re: configure cpu frequency to 800MHz for MC IMX6USEVM10AB

sureshrao — Wed, 14 Apr 2021 13:22:11 GMT

Hello @shreeharsha_ind ,

Please check Section 2.5.3 CPU frequency scaling of Linux Reference manual for configuring frequency of operation. The Linux documentation bundle can be downloaded from below link

https://www.nxp.com/webapp/Download?colCode=L4.14.98_2.3.0_LINUX_DOCS

Best Regards,

Suresh

Re: configure cpu frequency to 800MHz for MC IMX6USEVM10AB

igorpadykov — Thu, 15 Apr 2021 00:24:07 GMT

Hi Shree

one can try to adjust cpu0: cpu@0 {..
operating-points =

in dts:

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm/boot/dts/imx6dl.dtsi?h=imx_5.4.70_2.3.0

use Table 8. Operating Ranges i.MX 6Solo/6DualLite Applications Processors for Consumer Products

Best regards
igor

Re: configure cpu frequency to 800MHz for MC IMX6USEVM10AB

shreeharsha_ind — Thu, 15 Apr 2021 08:31:05 GMT

Hi Team,

We would like to understand the impacts on Power and Thermal qualifcation which has been carried out with old part numbers running at 800mhz.

Please let us know the impact if we change IMX6 chip running at 800Mhz to 1Ghz part number. What all areas are impacted for a PCB layout such as DDR , Power, Thermal ,etc.

Kindly share the update at earliest.

Regards,

Shree