LXR linux/arch/mn10300/kernel/csrc-mn10300.c

   1/* MN10300 clocksource
   2 *
   3 * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
   4 * Written by Mark Salter (msalter@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11#include <linux/clocksource.h>
  12#include <linux/init.h>
  13#include <asm/timex.h>
  14#include "internal.h"
  15
  16static cycle_t mn10300_read(struct clocksource *cs)
  17{
  18        return read_timestamp_counter();
  19}
  20
  21static struct clocksource clocksource_mn10300 = {
  22        .name   = "TSC",
  23        .rating = 200,
  24        .read   = mn10300_read,
  25        .mask   = CLOCKSOURCE_MASK(32),
  26        .flags  = CLOCK_SOURCE_IS_CONTINUOUS,
  27};
  28
  29int __init init_clocksource(void)
  30{
  31        startup_timestamp_counter();
  32        clocksource_register_hz(&clocksource_mn10300, MN10300_TSCCLK);
  33        return 0;
  34}
  35