2 * arch/sh/kernel/time.c
4 * Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
5 * Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
6 * Copyright (C) 2002 - 2009 Paul Mundt
7 * Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/profile.h>
17 #include <linux/timex.h>
18 #include <linux/sched.h>
19 #include <linux/clockchips.h>
20 #include <linux/platform_device.h>
21 #include <linux/smp.h>
22 #include <linux/rtc.h>
23 #include <asm/clock.h>
27 static void null_rtc_get_time(struct timespec *tv)
29 tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0);
33 static int null_rtc_set_time(const time_t secs)
38 void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
39 int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
41 #ifdef CONFIG_GENERIC_CMOS_UPDATE
42 void read_persistent_clock(struct timespec *ts)
47 int update_persistent_clock(struct timespec now)
49 return rtc_sh_set_time(now.tv_sec);
53 unsigned int get_rtc_time(struct rtc_time *tm)
55 if (rtc_sh_get_time != null_rtc_get_time) {
59 rtc_time_to_tm(tv.tv_sec, tm);
64 EXPORT_SYMBOL(get_rtc_time);
66 int set_rtc_time(struct rtc_time *tm)
70 rtc_tm_to_time(tm, &secs);
71 return rtc_sh_set_time(secs);
73 EXPORT_SYMBOL(set_rtc_time);
75 static int __init rtc_generic_init(void)
77 struct platform_device *pdev;
79 if (rtc_sh_get_time == null_rtc_get_time)
82 pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
88 module_init(rtc_generic_init);
90 void (*board_time_init)(void);
92 void __init time_init(void)
99 rtc_sh_get_time(&xtime);
100 set_normalized_timespec(&wall_to_monotonic,
101 -xtime.tv_sec, -xtime.tv_nsec);
103 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
104 local_timer_setup(smp_processor_id());
108 * Make sure all compiled-in early timers register themselves.
110 * Run probe() for two "earlytimer" devices, these will be the
111 * clockevents and clocksource devices respectively. In the event
112 * that only a clockevents device is available, we -ENODEV on the
113 * clocksource and the jiffies clocksource is used transparently
114 * instead. No error handling is necessary here.
116 early_platform_driver_register_all("earlytimer");
117 early_platform_driver_probe("earlytimer", 2, 0);