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doc: power_management: add diagrams illustrating power management

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Add diagram showing the current system power management and the central
method of device power management.

The diagrams were made using draw.io and can be edit using draw.io.y

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
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Wentong Wu 2019-09-25 20:25:51 +08:00 • committed by Anas Nashif
commit 8f2da767ee
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doc/reference/power_management/central_method.svg Normal file
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doc/reference/power_management/index.rst
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@ -205,6 +205,9 @@ transaction that cannot be interrupted. This method can be used in
implementations where the applications and components using devices are not
expected to be power aware and do not implement device power management.
.. image:: central_method.svg
:align: center
This method can also be used to emulate a hardware feature supported by some
SOCs which cause automatic entry to deep sleep when all devices are idle.
Refer to `Busy Status Indication`_ to see how to indicate whether a device is busy