Function to put devices in lower power mode were all implemented in the
same way. Deduplicate code there by implementing single function to
handle all cases.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
There is no point to specify number of core devices explicitly, as it
can be done by compiler with ARRAY_SIZE() macro.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Commit c248cdf17e remove deep sleep states
from residency policy based on SoC loses context in deep sleep states to
avoid a "forever timeout" power-off the whole system. It's right if deep
sleep means power off whole system only.
One of deep sleep states is that most power domains are shut off, but
except a few that retain just enough logic to allow the CPU to resume
from the same point of execution where it went to sleep. This is well
documented and implementations also have same behavior.
For another deep sleep state, system off, sys_pm_ctrl_disable_state can
prevent system off unexpectedly from being entered on long timeout. And
sys_pm_force_power_state can help power off whole system.
This reverts commit c248cdf17e.
Signed-off-by: Wentong Wu <wentong.wu@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>
Change sys_pm_force_power_state only works for the current ongoing
suspend operation, before the end of syspend state forced_pm_state
will be cleared.
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
When system going to sleep state, make peripherals go to state
DEVICE_PM_LOW_POWER_STATE which needs less time than state
DEVICE_PM_SUSPEND_STATE to save more power.
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Current PM policy allow devices make the decision if going to
sleep/deep sleep state, so it's not error message if some
devices don't enter suspend state, change it to debug level.
Signed-off-by: Wentong Wu <wentong.wu@intel.com>
Deep sleep states are documented to include SoC-level power gating,
i.e. the SoC loses context. In practice entering a deep sleep state
requires an external wakeup mechanism that may need to restart the
application.
Such states are too dangerous to enter automatically based on an
expected duration of sleep, especially since a "forever" sleep that
would normally be woken as a result of a peripheral event would select
the deepest sleep state available. Limit the sleep levels selected by
a residency policy to ones in which the CPU may be stopped, but will
not lose execution context.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
move misc/reboot.h to power/reboot.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
move misc/printk.h to sys/printk.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
move misc/__assert.h to sys/__assert.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
move power.h to power/power.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
move atomic.h to sys/atomic.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
Move internal and architecture specific headers from include/drivers to
subfolder for timer:
include/drivers/timer
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
These events aren't errors at all, but rather part of normal operation.
They shouldn't trigger error messages, especially given that the console
gets absolutely flooded with them if power management is activated.
Signed-off-by: Benjamin Lindqvist <benjamin.lindqvist@endian.se>
When compiling the kernel with CONFIG_SYS_CLOCK_TICKS_PER_SEC=0,
the CONFIG_SYS_CLOCK_EXISTS internal variable is unset.
This completely disables timer handling in the kernel, but a couple of
spots missed the required conditional compilation.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
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>
Rename power managment subsystem Kconfig options describing minimum
residency to make them easier to identify with respective policy.
Following is a detailed list of string replacements used:
s/SYS_PM_SLEEP_(\d)_MIN_RES/SYS_PM_MIN_RESIDENCY_SLEEP_$1/
s/SYS_PM_DEEP_SLEEP_(\d)_MIN_RES/SYS_PM_MIN_RESIDENCY_DEEP_SLEEP_$1/
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
Add SYS_POWER_ prefix to HAS_STATE_SLEEP_, HAS_STATE_DEEP_SLEEP_
options to align them with names of power states they control.
Following is a detailed list of string replacements used:
s/HAS_STATE_SLEEP_(\d)/HAS_SYS_POWER_STATE_SLEEP_$1/
s/HAS_STATE_DEEP_SLEEP_(\d)/HAS_SYS_POWER_STATE_DEEP_SLEEP_$1/
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This commit cleans up names of system power management functions by
assuring that:
- all functions start with 'sys_pm_' prefix
- API functions which should not be exposed to the user start with '_'
- name of the function hints at its purpose
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
There exists SoCs, e.g. STM32L4, where one of the low power modes
reduces CPU frequency and supply voltage but does not stop the CPU. Such
power modes are currently not supported by Zephyr.
To facilitate adding support for such class of power modes in the future
and to ensure the naming convention makes it clear that the currently
supported power modes stop the CPU this commit renames Low Power States
to Slep States and updates the documentation.
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
CONFIG_PM_LOG_LEVEL was renamed to CONFIG_SYS_PM_LOG_LEVEL in commit
c45961daae ("power: Rework OS <-> Application interface"), but the old
name is still used here. Fix the name.
Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
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>
The existing device_set_power_state() API works only in synchronous
mode and this is not desirable for devices(ex: Gyro) which take
longer time (few 100 mSec) to suspend/resume.
To support async mode, a new callback argument is added to the API.
The device drivers can asynchronously suspend/resume and call the
callback function upon completion of the async request.
This commit adds the missing callback parameter to all the drivers
to make it compliant with the new API.
Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
Disable low power/deep sleep modes when they are not enabled in Kconfig.
Otherwise if only low power modes are enabled (but no deep sleep),
Zephyr will try to swich to the lowest power mode (deep sleep) anyway,
only to discover that it's not availiable, resulting in no low power
mode at all being used.
By disabling the modes here if they are not enabled in Kconfig,
policy_residency will switch to the lowest low power mode instead.
Signed-off-by: Benjamin Valentin <benjamin.valentin@ml-pa.com>
CPU_LPS_n name used to indicate a low power state is cryptic and
incorrect. The low power states act on the whole SoC and not exclusively
on the CPU. This patch renames CPU_LPS_n states to LOW_POWER_n. Also
HAS_ pattern for Kconfig options is used in favor of a non standard
_SUPPORTED. Naming of deep sleep states was adjusted accordingly.
Following is a detailed list of string replacements used:
s/SYS_POWER_STATE_CPU_LPS_(\d)_SUPPORTED/HAS_STATE_LOW_POWER_$1/
s/SYS_POWER_STATE_CPU_LPS_(\d)/SYS_POWER_STATE_LOW_POWER_$1/
s/SYS_POWER_STATE_DEEP_SLEEP_(\d)_SUPPORTED/HAS_STATE_DEEP_SLEEP_$1/
Signed-off-by: Piotr Mienkowski <piotr.mienkowski@gmail.com>
This commit adds better description to the Kconfig options
configuring residency-based power policy.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
This commit fixes compilation of System Power Management module
when Device Power Management is disabled.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
Some of power states used numerical suffix while otthers not.
This commit adds proper suffix to all power state names.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
f
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>
At the moment application which chosen policy based power
management does not have an option to override decision
taken by the policy (it could only disable some power
states).
This commit adds the sys_pm_force_power_state() method,
which allow the application to choose power state used
when OS decide to suspend the SoC.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
The power management framework used two different abstractions
to describe power states. The SYS_PM_* given coarse information
what kind of power state (low power or deep sleep) was used,
while the SYS_POWER_STATE_* abstraction provided information
about particular power mode.
This commit removes the SYS_PM_* abstraction as the same
information is already carried in SYS_POWER_STATE_*.
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>
Each platform is now specifying list of supported power states
as a Kconfig options. Some of the specified states could be
disabled in runtime. As result there is no need for the removed
interface.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
The power subsystems call the sys_pm_notify_lps_entry()
and sys_pm_notify_lps_exit() to notify application that
given power mode has been entered and exited. This commit
adds weak implementation of these functions in order to
not force applications to implement its own empty stubs.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
The algorithm used in residency-based power policy should
select the most saving power mode basing on the expected
sleep time. However due to small bug, the most power
efficient mode was never selected.
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
This commit updates the README and sample.yaml in order to signal
that this demo works flawlessly on the nRF51 platform.
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>
