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How to reduce the i.MX8M Mini VPU frequency

Question asked by Mario Schuknecht on Feb 12, 2020
Latest reply on Feb 14, 2020 by Mario Schuknecht

Hello,

 

To reduce power consumption, on a customer board based on i.MX8M Mini EVK board, the VPU frequency is to be reduced.

 

The data sheet https://www.nxp.com/docs/en/data-sheet/IMX8MMIEC.pdf table 9 lists 3 operating ranges for VDD_VPU with different voltage ranges and possible frequencies.

 

How can the i.MX8M Mini VPU frequency be reduced to 450MHz to enable the operating range 0.805 to 0.9V?

 

The NXP kernel 4.14.98 is used.

Can the VPU frequency be set at runtime, via device tree or in a kernel module?

 

Thanks in advance.

 

Mario

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