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Revision and Notes

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The Linux Kernel supports dynamic voltage and frequency switching (DVFS) in order to minimize power usage. Generally, the feature should remain enabled, however, if power consumption and heat dissipation aren't an issue and low latency is required, it might make sense to disable frequency scaling.

Maximum Frequency by SoMs

The maximum frequency to be used depends on the SoC present in the module, see the table below:

Module

Maximum frequency (Hz)

i.mx6

792000

i.mx8m plus/mini (Industrial)

1600000

i.mx8m plus/mini (Commercial)

1800000

CPU Frequency

Please Note:

The operation below requires root access.

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Where perfomance is the name of the scaling governor.

Changing CPU frequency

Please Note:

CPU frequency can be changed only when the scaling governor is set to userspace.

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Where frequency is one of the available CPU frequencies.

Info

Note:

The userspace governor must be set to change the frequency value.

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