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doc: pm: Update system pm diagram

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Update system pm diagram to reflect recent changes in the subysystem.
Use graphviz to create this new diagram.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This commit is contained in:
Flavio Ceolin 2024-03-26 16:15:31 -07:00 • committed by Johan Hedberg
commit cd685bdce8
2 changed files with 46 additions and 6 deletions
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doc/services/pm/system.rst
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@ -17,9 +17,52 @@ source.
The following diagram describes system power management:
.. image:: images/system-pm.svg
:align: center
:alt: System power management
.. graphviz::
:caption: System power management
digraph G {
compound=true
node [height=1.2 style=rounded]
lock [label="Lock interruptions"]
config_pm [label="CONFIG_PM" shape=diamond style="rounded,dashed"]
forced_state [label="state forced ?", shape=diamond style="rounded,dashed"]
config_system_managed_device_pm [label="CONFIG_PM_DEVICE" shape=diamond style="rounded,dashed"]
config_system_managed_device_pm2 [label="CONFIG_PM_DEVICE" shape=diamond style="rounded,dashed"]
pm_policy [label="Check policy manager\nfor a power state "]
pm_suspend_devices [label="Suspend\ndevices"]
pm_resume_devices [label="Resume\ndevices"]
pm_state_set [label="Change power state\n(SoC API)" style="rounded,bold"]
pm_system_resume [label="Finish wake-up\n(SoC API)\n(restore interruptions)" style="rounded,bold"]
k_cpu_idle [label="k_cpu_idle()"]
subgraph cluster_0 {
style=invisible;
lock -> config_pm
}
subgraph cluster_1 {
style=dashed
label = "pm_system_suspend()"
forced_state -> config_system_managed_device_pm [label="yes"]
forced_state -> pm_policy [label="no"]
pm_policy -> config_system_managed_device_pm
config_system_managed_device_pm -> pm_state_set:e [label="no"]
config_system_managed_device_pm -> pm_suspend_devices [label="yes"]
pm_suspend_devices -> pm_state_set
pm_state_set -> config_system_managed_device_pm2
config_system_managed_device_pm2 -> pm_resume_devices [label="yes"]
config_system_managed_device_pm2 -> pm_system_resume [label="no"]
pm_resume_devices -> pm_system_resume
}
{rankdir=LR k_cpu_idle; forced_state}
pm_policy -> k_cpu_idle [label="PM_STATE_ACTIVE\n(no power state meet requirements)"]
config_pm -> k_cpu_idle [label="no"]
config_pm -> forced_state [label="yes" lhead="cluster_1"]
pm_system_resume:e -> lock:e [constraint=false lhed="cluster_0"]
}
Some handful examples using different power management features: