[rtems-docs commit] bsp-howto: Clarify clock driver initialization

[Sebastian Huber]

Module:    rtems-docs
Branch:    master
Commit:    d585fcb9a8a6fab15d6bba0faf19c0923190c00e
Changeset: http://git.rtems.org/rtems-docs/commit/?id=d585fcb9a8a6fab15d6bba0faf19c0923190c00e

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Thu Dec 19 09:11:57 2019 +0100

bsp-howto: Clarify clock driver initialization

Close #3834.

---

 bsp-howto/clock.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/bsp-howto/clock.rst b/bsp-howto/clock.rst
index ef8665a..f3d30ce 100644
--- a/bsp-howto/clock.rst
+++ b/bsp-howto/clock.rst
@@ -65,6 +65,11 @@ Clock Tick Only
 Initialization
 ==============
 
+The clock driver is initialized by a dedicated system initialization handler if
+requested by the application configuration option
+``CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER``.  The clock driver does not use the
+legacy IO driver framework.
+
 Timecounter Variant
 ~~~~~~~~~~~~~~~~~~~