src/lib/timer.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <timer.h>
   4 #include <delay.h>
   5 #include <thread.h>
   6
   7 __weak void init_timer(void) { /* do nothing */ }
   8
   9 void udelay(unsigned int usec)
  10 {
  11         struct stopwatch sw;
  12
  13         /*
  14          * As the timer granularity is in microseconds pad the
  15          * requested delay by one to get at least >= requested usec delay.
  16          */
  17         usec += 1;
  18
  19         if (!thread_yield_microseconds(usec))
  20                 return;
  21
  22         stopwatch_init_usecs_expire(&sw, usec);
  23         stopwatch_wait_until_expired(&sw);
  24 }