doc: add a section for timeutil APIs

Describe the role of these APIs, key concepts that they depend on, and
expose the low-level API.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
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Peter Bigot 2020-10-07 11:59:48 -05:00 committed by Anas Nashif
commit 7b3dc4856a
4 changed files with 261 additions and 0 deletions

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@ -66,6 +66,8 @@ multiples of each other and where the output fits within a single
word, these conversions expand to a 2-4 operation sequence, requiring
full precision only where actually required and requested.
.. _kernel_timing_uptime:
Uptime
======