Documentation/power/regulator/design.rst

Source file repositories/reference/linux-study-clean/Documentation/power/regulator/design.rst

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Documentation/power/regulator/design.rst
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Support Tooling And Documentation: documentation
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==========================
Regulator API design notes
==========================

This document provides a brief, partially structured, overview of some
of the design considerations which impact the regulator API design.

Safety
------

 - Errors in regulator configuration can have very serious consequences
   for the system, potentially including lasting hardware damage.
 - It is not possible to automatically determine the power configuration
   of the system - software-equivalent variants of the same chip may
   have different power requirements, and not all components with power
   requirements are visible to software.

.. note::

     The API should make no changes to the hardware state unless it has
     specific knowledge that these changes are safe to perform on this
     particular system.

Consumer use cases
------------------

 - The overwhelming majority of devices in a system will have no
   requirement to do any runtime configuration of their power beyond
   being able to turn it on or off.

 - Many of the power supplies in the system will be shared between many
   different consumers.

.. note::

     The consumer API should be structured so that these use cases are
     very easy to handle and so that consumers will work with shared
     supplies without any additional effort.

Annotation

Implementation Notes