zephyr/subsys/power/Kconfig

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# Copyright (c) 2014-2015 Wind River Systems, Inc.
# Copyright (c) 2016 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
menu "Power Management"
menuconfig SYS_POWER_MANAGEMENT
bool "System Power management"
select TICKLESS_IDLE
help
This option enables the board to implement extra power management
policies whenever the kernel becomes idle. The kernel informs the
power management subsystem of the number of ticks until the next kernel
timer is due to expire.
if SYS_POWER_MANAGEMENT
config SYS_POWER_SLEEP_STATES
bool "Low Power states"
depends on HAS_SYS_POWER_STATE_SLEEP_1 || \
HAS_SYS_POWER_STATE_SLEEP_2 || \
HAS_SYS_POWER_STATE_SLEEP_3
help
This option enables the kernel to interface with a power manager
application. This permits the system to enter a custom CPU low power
state when the kernel becomes idle. The low power state could be any of
the CPU low power states supported by the processor. Generally the one
saving most power.
config SYS_POWER_DEEP_SLEEP_STATES
bool "Deep Sleep states"
depends on HAS_SYS_POWER_STATE_DEEP_SLEEP_1 || \
HAS_SYS_POWER_STATE_DEEP_SLEEP_2 || \
HAS_SYS_POWER_STATE_DEEP_SLEEP_3
help
This option enables the kernel to interface with a power manager
application. This permits the system to enter a Deep sleep state
supported by the SOC where the system clock is turned off while RAM is
retained. This state would be entered when the kernel becomes idle for
extended periods and would have a high wake latency. Resume would be
from the reset vector same as cold boot. The interface allows
restoration of states that were saved at the time of suspend.
config SYS_PM_STATE_LOCK
bool "Enable Power State locking capability"
help
Enable Power Management system state locking capability
if any application wants to temporarily disable certain
Power States while doing any critical work or needs quick
response from hardware resources.
config SYS_PM_DIRECT_FORCE_MODE
bool "Enable system power management direct force trigger mode"
help
Enable system power management direct force trigger mode. In
this mode application thread can directly put system in sleep
or deep sleep mode instead of waiting for idle thread to do
it, so that it can reduce latency to enter low power mode.
config SYS_PM_DEBUG
bool "Enable System Power Management debug hooks"
help
Enable System Power Management debugging hooks.
config DEVICE_IDLE_PM
bool "Enable device Idle Power Management"
depends on DEVICE_POWER_MANAGEMENT
select POLL
help
Enable device Idle Power Management to save power.
With device Idle PM enabled, devices can be suspended or
resumed based on the device usage even while the CPU or
system is running.
source "subsys/power/policy/Kconfig"
module = SYS_PM
module-str = System Power Management
source "subsys/logging/Kconfig.template.log_config"
endif # SYS_POWER_MANAGEMENT
config DEVICE_POWER_MANAGEMENT
bool "Device power management"
help
This option enables the device power management interface. The
interface consists of hook functions implemented by device drivers
that get called by the power manager application when the system
is going to suspend state or resuming from suspend state. This allows
device drivers to do any necessary power management operations
like turning off device clocks and peripherals. The device drivers
may also save and restore states in these hook functions.
endmenu