doc: pm: Update system pm diagram (cd685bdc) · Commits · Wenxi XU / zephyr

doc/services/pm/images/system-pm.svg

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doc/services/pm/system.rst

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		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:

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