CPU Frequency (CPUFreq)

Dynamic CPU Frequency Scaling. More...

Topics
	CPU Frequency Policy
	CPU Frequency Scaling Policy.
	CPU Frequency pstate
	CPU Frequency Scaling Performance State (pstate)

Functions
int	cpu_freq_pstate_set (const struct pstate *state)
	Request processor set the given performance state.

Detailed Description

Dynamic CPU Frequency Scaling.

Since

4.3

Version

0.1.0

Function Documentation

cpu_freq_pstate_set()

int cpu_freq_pstate_set

(

const struct pstate *

state

)

#include <zephyr/cpu_freq/cpu_freq.h>

Request processor set the given performance state.

To be implemented by the SoC. This API abstracts the hardware and SoC specific calls required to change the performance state of the current CPU. The caller must ensure that the current CPU does not change. If called from an ISR or a single CPU system, this restriction is automatically met. If called from a thread on an SMP system, either interrupts or the scheduler must be disabled to ensure the current CPU does not change.

Note

It is not guaranteed that the performance state will be set immediately, or at all.

Parameters

state

Pointer to performance state.

Return values

0	if request received successfully, -errno in case of failure.