CPU Power Management

Functions
int	pm_cpu_off (void)
	Power down the calling core. More...
int	pm_cpu_on (unsigned long cpuid, uintptr_t entry_point)
	Power up a core. More...
int	pm_system_off (void)
	Power down the system. More...

Detailed Description

Function Documentation

pm_cpu_off()

int pm_cpu_off

(

void

)

#include <include/zephyr/drivers/pm_cpu_ops.h>

Power down the calling core.

This call is intended for use in hotplug. A core that is powered down by cpu_off can only be powered up again in response to a cpu_on

Return values

The	call does not return when successful
-ENOTSUP	If the operation is not supported

pm_cpu_on()

int pm_cpu_on	(	unsigned long	cpuid,
		uintptr_t	entry_point
	)

#include <include/zephyr/drivers/pm_cpu_ops.h>

Power up a core.

This call is used to power up cores that either have not yet been booted into the calling supervisory software or have been previously powered down with a cpu_off call

Parameters

cpuid	CPU id to power on
entry_point	Address at which the core must commence execution

Return values

0	on success, a negative errno otherwise
-ENOTSUP	If the operation is not supported

pm_system_off()

int pm_system_off

(

void

)

#include <include/zephyr/drivers/pm_cpu_ops.h>

Power down the system.

This call is used to power down the whole system.

A compliant PSCI implementation will never return, but some real-world implementations do return errors in some cases.

Return values

does	not return on success, a negative errno otherwise
-ENOTSUP	If the operation is not supported