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doc: reference: pm: move terms to glossary

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Glossary is a place where all terms can be defined, so move them there.
Some terms have been slightly adjusted and SOC interface remove since it
was not much relevant.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This commit is contained in:
Gerard Marull-Paretas 2021-11-09 16:59:40 +01:00 • committed by Christopher Friedt
commit 11cf06f5d5
2 changed files with 18 additions and 28 deletions
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18
doc/glossary.rst
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@ -49,6 +49,16 @@ Glossary of Terms
specified by the build system can be over-ridden by the application,
if desired.
device runtime power management
Device Runtime Power Management (PM) refers the capability of devices to
save energy independently of the the system power state. Devices will keep
reference of their usage and will automatically be suspended or resumed.
This feature is enabled via the :kconfig:`CONFIG_PM_DEVICE_RUNTIME`
Kconfig option.
idle thread
A system thread that runs when there are no other threads ready to run.
IDT
(Interrupt Descriptor Table) a data structure used by the x86
architecture to implement an interrupt vector table. The IDT is used
@ -65,9 +75,17 @@ Glossary of Terms
The set of Zephyr-supplied files that implement the Zephyr kernel,
including its core services, device drivers, network stack, and so on.
power gating
Power gating reduces power consumption by shutting off areas of an
integrated circuit that are not in use.
SoC
`System on a chip`_
system power state
System power states describe the power consumption of the system as a
whole. System power states are are represented by :c:enum:`pm_state`.
west
A multi-repo meta-tool developed for the Zephyr project. See :ref:`west`.

28
doc/reference/power_management/index.rst
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@ -7,34 +7,6 @@ Zephyr RTOS power management subsystem provides several means for a system
integrator to implement power management support that can take full
advantage of the power saving features of SOCs.
Terminology
***********
:dfn:`SOC interface`
This is a general term for the components that have knowledge of the
SOC and provide interfaces to the hardware features. It will abstract
the SOC specific implementations to the applications and the OS.
:dfn:`Idle Thread`
A system thread that runs when there are no other threads ready to run.
:dfn:`Power gating`
Power gating reduces power consumption by shutting off current to blocks of
the integrated circuit that are not in use.
:dfn:`Power State`
SOC Power State describes processor and device power states implemented at
the SOC level. Power states are represented by :c:enum:`pm_state` and each
one has a different meaning.
:dfn:`Device Runtime Power Management`
Device Runtime Power Management (PM) refers the capability of
devices be able of saving energy independently of the the
system. Devices will keep reference of their usage and will
automatically be suspended or resumed. This feature is enabled via
the ::kconfig:`CONFIG_PM_DEVICE_RUNTIME` Kconfig option.
Overview
********