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