Note that the client structure must be reinitialized before each use,
and make more clear that its internal fields are not part of the
public API.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
There are various situations where it's necessary to support turning
devices on or off at runtime, includin power rails, clocks, other
peripherals, and binary device power management. The complexity of
properly managing multiple consumers of a device in a multithreaded
system suggests that a shared implementation is desirable. This
commit provides an API that supports managing on-off resources.
Signed-off-by: Peter A. Bigot <pab@pabigot.com>
