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docs: pm: Add power domain information

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Document power domains on Zephyr.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
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Flavio Ceolin 2021-10-11 15:16:26 -07:00 • committed by Anas Nashif
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doc/glossary.rst
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@ -75,6 +75,11 @@ 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 domain
A power domain is a collection of devices for which power is
applied and removed collectively in a single action. Power
domains are represented by :c:struct:`device`.
power gating
Power gating reduces power consumption by shutting off areas of an
integrated circuit that are not in use.