internal: add function protype for mux setup.

Now accesible from all mraa modules

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>

include/mraa_internal.h

@@ -37,6 +37,14 @@ extern "C" {
 extern mraa_adv_func_t* advance_func;
 extern mraa_board_t* plat;
 
+/**
+ * Takes in pin information and sets up the multiplexors.
+ *
+ * @param meta
+ * @return mraa result type indicating success of actions.
+ */
+mraa_result_t mraa_setup_mux_mapped(mraa_pin_t meta);
+
 /**
  * Will check input is valid for gpio and will also setup required multiplexers.
  * @param pin the pin as read from the board surface. i.e IO3 would be 3/

src/mraa.c

@@ -149,7 +149,7 @@ mraa_set_priority(const unsigned int priority)
     return sched_setscheduler(0, SCHED_RR, &sched_s);
 }
 
-static mraa_result_t
+mraa_result_t
 mraa_setup_mux_mapped(mraa_pin_t meta)
 {
     int mi;