timer.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <timer.h>
#include <delay.h>
#include <thread.h>
 
__weak void init_timer(void) { /* do nothing */ }
 
void udelay(unsigned int usec)
{
        struct stopwatch sw;
 
        /*
         * As the timer granularity is in microseconds pad the
         * requested delay by one to get at least >= requested usec delay.
         */
        usec += 1;
 
        if (!thread_yield_microseconds(usec))
                return;
 
        stopwatch_init_usecs_expire(&sw, usec);
        stopwatch_wait_until_expired(&sw);
}