This feature predated the tickless kernel and has been in legacy mode
for a while. We now have no drivers or systems that do not support
tickless, so remove this option and cleanup the code to only use
tickless.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
pm_power_state_force had two different behavior, if
CONFIG_PM_DIRECT_FORCE_MODE was enabled this function immediately
calls pm_system_suspend() without wait the idle thread. Without this
option enabled, this function will wait for the idle thread run but
will use the given power state instead of asking the policy manager.
The problem in both cases is that the process involves handling
devices and the way that was implemented if at least one device failed
to go to low power or suspended the system power state would not
change / be forced.
This commit simplifies this API removing the conditional behavior
since it is not clear the need for that and effectively, and
immediately, forces the system to go to the given state without
bother with devices.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Simplify pm subsystem removing PM_STATE_LOCK option. Constraints API is
small and is a key component of power subsystem.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Some targets, such as network cores on a multi-core SoC, do not
support system power management because they do not control the SoC.
Provide a flag that can be selected to inihibit enabling system power
management on those targets.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This reverts commit f38ba314ea.
nrf5340dk_nrf5340_cpunet doesn't support power management, but that
should be handled another way.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This targets was previously enabling PM but the code was doing nothing
because the logic was under an unsatisfied ifdef condition.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
The idle, when power management is enabled, requires system clock to
be present.
This commit adds dependency, to PM option, on SYS_CLOCK_EXISTS.
Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
- Remove SYS_ prefix
- shorten POWER_MANAGEMENT to just PM
- DEVICE_POWER_MANAGEMENT -> PM_DEVICE
and use PM_ as the prefix for all PM related Kconfigs
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
When try to enable CONFIG_DEVICE_POWER_MANAGEMENT for a board,
the #error directive in subsys/power/device.c requires that
"MAX_PM_DEVICE" and "core_devices[]" must be defined exactly in that
file, or a compile error will come up.
For flexibility, this patch move "PM_MAX_DEVICE" to Kconfig and define
a weak version of "z_mp_core_devices[]", so any board or SOC can define
these varibles in their own module.
Signed-off-by: Meng xianglin <xianglinx.meng@intel.com>
Add 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.
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Update the files which contain no license information with the
'Apache-2.0' SPDX license identifier. Many source files in the tree are
missing licensing information, which makes it harder for compliance
tools to determine the correct license.
By default all files without license information are under the default
license of Zephyr, which is Apache version 2.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Add framework for device Idle Power Management(IPM)
for suspending devices based on device idle. This will
help in saving power even while system(CPU) is active.
The framework uses device_set_power_state() API set the
device power state accordingly based on the usage count.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
This commit simplifies OS <-> Application interface controlling power
management. In the previous approach application-based PM required
overriding sys_suspend() and sys_resume() functions. As these functions
actually implemented power state change, in such case application
basically had to provide own implementation of all PM-related stuff,
which was not portable and hard to maintain.
This commit changes this scheme: The sys_suspend() and sys_resume()
are now system functions while the application could either use
built-in power management policies or provide its own. All details
of power mode switching are now handled by the OS.
Also, this commit cleans up the Kconfig options related to system-level
power management grouping them under common CONFIG_SYS_PM_ prefix.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
This commit enables fine-grained power state locking.
Now, each power state could be independently enabled or disabled.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
Add API's to enable/disable System PM states so that an
an application can enable/disable system from entering
certain Low Power states.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Changed LOG_MODULE_REGISTER and LOG_MODULE_DECLARE macros to take log
level as optional parameter. LOG_MODULE_DECLARE can now also be used
in static inline functions in headers. Added LOG_LEVEL_SET macro
which is used when instance logging API is used to indicate maximal
log level compiled into the file.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Add the necessary PM hooks like Low Power state entry
count and residencies for logging and debugging purposes.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Add support for adding and selecting pluggable PM policies
which can be enabled based on the application needs.
Also added a dummy policy for demonstration purpose which
simply loops over the supported PM states.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Add support for OS managed Power Management framework for Zephyr
under 'subsys/power'. This framework takes care of implementing
the _sys_soc_suspend/_sys_soc_resume API's, a PM policy based on
SoC Low Power residencies and also provides necessary API's to
do devices suspend and resume.
Also add necessary changes to support the existing Application
managed Power Management framework.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
