kernel: kconfig: move power management options out
Change-Id: I5d7068ca7a5793bb3499f2bf2dc1abc4e337313e Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif
Anas Nashif
parent
666afe5923
commit
ed116ace6d
2 changed files with 91 additions and 80 deletions
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@ -113,7 +113,6 @@ config APPLICATION_INIT_PRIORITY
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This priority level is for end-user drivers such as sensors and display
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which have no inward dependencies.
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menu "Security Options"
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config STACK_CANARIES
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@ -139,83 +138,6 @@ endmenu
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source "kernel/unified/Kconfig"
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menu "Power Management"
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config SYS_POWER_MANAGEMENT
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bool
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prompt "Power management"
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default n
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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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menu "Power Management Features"
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depends on SYS_POWER_MANAGEMENT
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config SYS_POWER_LOW_POWER_STATE
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bool
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prompt "Low power state"
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default n
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depends on SYS_POWER_MANAGEMENT && SYS_POWER_LOW_POWER_STATE_SUPPORTED
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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
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bool
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prompt "Deep sleep state"
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default n
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depends on SYS_POWER_MANAGEMENT && SYS_POWER_DEEP_SLEEP_SUPPORTED
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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 DEVICE_POWER_MANAGEMENT
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bool
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prompt "Device power management"
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default n
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depends on SYS_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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config TICKLESS_IDLE
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bool
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prompt "Tickless idle"
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default y if TICKLESS_IDLE_SUPPORTED
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help
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This option suppresses periodic system clock interrupts whenever the
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kernel becomes idle. This permits the system to remain in a power
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saving state for extended periods without having to wake up to
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service each tick as it occurs.
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config TICKLESS_IDLE_THRESH
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int
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prompt "Tickless idle threshold"
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default 3
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depends on TICKLESS_IDLE
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help
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This option enables clock interrupt suppression when the kernel idles
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for only a short period of time. It specifies the minimum number of
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ticks that must occur before the next kernel timer expires in order
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for suppression to happen.
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endmenu
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config MDEF
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bool
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prompt "Use MDEF files for statically configured kernel objects"
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@ -229,6 +151,6 @@ config MDEF
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In doubt, select 'y'.
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endmenu
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source "kernel/Kconfig.event_logger"
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source "kernel/Kconfig.power_mgmt"
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89
kernel/Kconfig.power_mgmt
Normal file
89
kernel/Kconfig.power_mgmt
Normal file
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@ -0,0 +1,89 @@
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#
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# Copyright (c) 2014-2015 Wind River Systems, Inc.
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# Copyright (c) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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menuconfig SYS_POWER_MANAGEMENT
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bool
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prompt "Power management"
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default n
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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_LOW_POWER_STATE
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bool
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prompt "Low power state"
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default n
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depends on SYS_POWER_LOW_POWER_STATE_SUPPORTED
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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
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bool
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prompt "Deep sleep state"
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default n
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depends on SYS_POWER_DEEP_SLEEP_SUPPORTED
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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 DEVICE_POWER_MANAGEMENT
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bool
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prompt "Device power management"
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default n
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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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config TICKLESS_IDLE
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bool
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prompt "Tickless idle"
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default y if TICKLESS_IDLE_SUPPORTED
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help
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This option suppresses periodic system clock interrupts whenever the
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kernel becomes idle. This permits the system to remain in a power
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saving state for extended periods without having to wake up to
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service each tick as it occurs.
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config TICKLESS_IDLE_THRESH
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int
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prompt "Tickless idle threshold"
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default 3
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depends on TICKLESS_IDLE
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help
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This option enables clock interrupt suppression when the kernel idles
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for only a short period of time. It specifies the minimum number of
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ticks that must occur before the next kernel timer expires in order
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for suppression to happen.
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endif
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