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doc: pm: document system pm limitations

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Document the limitations of system power management when it comes to
transitions that are run from the idle thread.

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
This commit is contained in:
Jordan Yates 2022-03-20 09:13:43 +10:00 • committed by Carles Cufí
commit 37e78175e5
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6
doc/services/pm/device.rst
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@ -73,6 +73,12 @@ in transition between power states:
* Gate/Un-gate power.
* Mask/Un-mask interrupts.
.. note::
When using :ref:`pm-system`, device transitions can be run from the idle thread.
As functions in this context cannot block, transitions that intend to use blocking
API's **must** check whether they can do so with :c:func:`k_can_yield`.
Device Model with Power Management Support
******************************************

2
doc/services/pm/system.rst
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@ -1,3 +1,5 @@
.. _pm-system:
System Power Management
#######################