This is needed so that this value can be used in all places in C (and C++) code. Unlike C++ you can't always use a static const int variable to declare an array size for example. Trying to do so will yield compiler errors. In addition, during the declaration of the uart_ow_context, replace a hardcoded '8' with this macro. Originally, the '8' was hardcoded for this very reason. Signed-off-by: Jon Trulson <jtrulson@ics.com> Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>