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bsp-howto: Mention clock driver hook removal

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Update #3436.
This commit is contained in:
Sebastian Huber 2018-06-19 08:15:48 +02:00
parent 2c2c6cc18e
commit c765aa0357
1 changed files with 1 additions and 22 deletions
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bsp-howto/clock.rst
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@ -271,28 +271,7 @@ The hardware-specific support at tick is specified by
System Shutdown Support System Shutdown Support
======================= =======================
Optionally, the :dfn:`Clock Driver Shell` provides the routine ``Clock_exit()`` The clock driver system shutdown support was removed in RTEMS 5.1.
that is scheduled to be run during system shutdown via the ``atexit()``
routine. The hardware-specific shutdown support is specified by
``Clock_driver_support_shutdown_hardware()`` which is used by ``Clock_exit()``.
It should disable the clock tick source if it was enabled. This can be used to
prevent clock ticks after the system is shutdown. The
``Clock_driver_support_shutdown_hardware()`` must be provided as a macro. In
case this macro is undefined, then the shutdown support is disabled. This is
useful for example on memory constrained systems to avoid the ``atexit()``
overhead.
.. code-block:: c
static void some_support_shutdown_hardware( void )
{
/* Shutdown hardware */
}
#define Clock_driver_support_shutdown_hardware() \
some_support_shutdown_hardware()
#include "../../../shared/dev/clock/clockimpl.h"
SMP Support SMP Support
=========== ===========