Async now uses its own work queue, which means it consumes more
resources. Since not all applications need the async API, we can make
it optional without any penalty for those applications.
Signed-off-by: Flavio Ceolin <flavio@hubblenetwork.com>
Device runtime is using the system workqueue to do operations
that are mostly blockers (suspend a device). This should not happen.
This commit adds an option to use dedicated queue for the device runtime
async operations.
The test for this API was assuming that the system workqueue
priority (which is cooperative) so we need to change the test priority
to be lower than the device runtime workqueue priority.
Signed-off-by: Flavio Ceolin <flavio@hubblenetwork.com>
When core is suspended and power mode has non zero exit_latency_us
a system timeout will be rescheduled to a point in time that is
earlier by exit_latency_us than request. It is to accommodate for
lengthy resuming procedure which would cause requested timeout to
be significantly late. However, setting additional wake up point
has cost, it is one more redundant core wake up and that impacts
performance and power consumption.
Add Kconfig option to chose what conversion method is used. It has
the biggest impact on small exit_latency_us where conversion may
result in 0 ticks (no pre-wake up) or 1 tick (wake up).
Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
policy.c has grown organically, it contained many independent pieces of
code. This patch splits each logical unit into its own C file, making it
easier to browse the code.
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
PM_DEVICE_RUNTIME_EXCLUSIVE was deprecated and its behavior
is achived with PM_DEVICE_SYSTEM_MANAGED=n.
Fixes#76037
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Add a symbol to enable device power state constraints this
saves resources when this feature is not needed.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
PM_DEVICE is not attached to system managed device power management.
It is a very common use case targets with device runtime power
management that don't want system device power management enabled.
We introduce a new symbol (PM_DEVICE_SYSTEM_MANAGED) to explicit
control whether or not system device power management should be
globally enabled.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
That is option has shown confusing on it is attempt to prevent
system pm doing device power management. Lets address this
problem properly.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
s2ram procedure used RAM magic word for marking suspend-to-RAM. This
method may not work in some cases, e.g. when global reset does not
reset RAM content. In that case resuming from s2ram is detected when
global reset occurred.
RAM magic word method is the default but with
CONFIG_PM_S2RAM_CUSTOM_MARKING a custom implementation can be provided.
Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
Add support for a "pm" shell command to trigger suspend/resume as well
as runtime-get/put on devices. This is useful for testing during driver
development.
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Add check for device busy when CONFIG_PM_NEED_ALL_DEVICES_IDLE is
set to y because one or more devices may still in busy and causes
problem when system go into low power in Intel ISH platform.
Signed-off-by: Leifu Zhao <leifu.zhao@intel.com>
Add a new Kconfig option that has to be selected by SoCs providing PM
hooks. This option will be now required to enable CONFIG_PM. Before this
change, CONFIG_PM could always be enabled, regardless of SoC providing
any kind of low-power support.
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
The option can now be set by projects. This change will also allow to
make it dependent on a future CONFIG_DEVICE_DEPS option.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Rename the Kconfig option to be in line with recent renamings in device
handles/dependencies.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
For the async operation move from condition variables to events to
reduce the dependency on the mutexes that cannot be used in IRQ
context.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Add a new API used by arch to implement suspend-to-RAM (S2RAM).
The API is composed by a single function to save the CPU context on
suspend.
A CPU context is the arch-specific set of registers that must be
preserved on power-off (in retained RAM) to be able to resume the
execution from the point it was suspended without going through the
whole kernel startup stage.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Sometimes we want to entirely decouple the system PM from the device PM,
leaving the devices to manage its own power states using the runtime PM.
This is currently not possible because the suspend / resume code path is
triggering the device PM hooks even when the runtime PM is enabled.
Introduce a new PM_DEVICE_RUNTIME_EXCLUSIVE symbol to allow the platform
to skip the device PM triggers on suspend / resume.
Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Add API to add devices to a power domain in runtime. The number of
devices that can be added is defined in build time.
The script gen_handles.py will check the number defined in
`CONFIG_PM_DEVICE_POWER_DOMAIN_DYNAMIC` to resize the handles vector,
adding empty slots in the supported sector to be used later.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Move policy code one level up for simplicity, since there is a single
source file. Source file has been renamed to "policy.c" to make things
clear.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
According to Kconfig guidelines, boolean prompts must not start with
"Enable...". The following command has been used to automate the changes
in this patch:
sed -i "s/bool \"[Ee]nables\? \(\w\)/bool \"\U\1/g" **/Kconfig*
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Add a Kconfig symbol to enable/disable power domain on Zephyr.
Disabling power domain save some memory / space.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
List of improvements:
- The PM logging module was only available if CONFIG_PM=y, however, it
was also used by Device PM (which can be selected without PM). A new
logging module has been created for Device PM.
- Log level is passed to LOG_MODULE_(DECLARE|REGISTER)
- Logger name has been adjusted to `pm` (was `power`)
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
POLL is not a dependency of runtime device PM since it now uses
conditional variables to notify waiting threads.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
SYS_POWER_MANAGEMENT and DEVICE_POWER_MANAGEMENT were deprecated in
2.5.0, remove them now.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
Uses the stats subsys to provide simple but useful debugging stats for
power management state changes and timing.
Removes the no longer needed PM_DEBUG config option
Replaces the use of PM_DEBUG for a test clock output pin for mec1501 and
adds in its place an SoC Kconfig option to enable it.
Adds a STATS_SET macro for assigning a value to a stat group field
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
When a device is defined a new pointer to a device will be created in
the "z_pm_device_slots" region, effectively creating a device array with
the same size as the number of system devices. This array is then used
by the device PM subsystem to keep track of suspended devices during
power transitions.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
