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timer.c

/*
 * arch/sh/kernel/timers/timer.c - Common timer code
 *
 *  Copyright (C) 2005  Paul Mundt
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <asm/timer.h>

static struct sys_timer *sys_timers[] = {
#ifdef CONFIG_SH_TMU
      &tmu_timer,
#endif
#ifdef CONFIG_SH_MTU2
      &mtu2_timer,
#endif
#ifdef CONFIG_SH_CMT
      &cmt_timer,
#endif
      NULL,
};

static char timer_override[10];
static int __init timer_setup(char *str)
{
      if (str)
            strlcpy(timer_override, str, sizeof(timer_override));
      return 1;
}
__setup("timer=", timer_setup);

struct sys_timer *get_sys_timer(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(sys_timers); i++) {
            struct sys_timer *t = sys_timers[i];

            if (unlikely(!t))
                  break;
            if (unlikely(timer_override[0]))
                  if ((strcmp(timer_override, t->name) != 0))
                        continue;
            if (likely(t->ops->init() == 0))
                  return t;
      }

      return NULL;
}

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