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 unsigned long read_persistent_clock(void)
49 int update_persistent_clock(struct timespec now)
51 return rtc_sh_set_time(now.tv_sec);
55 unsigned int get_rtc_time(struct rtc_time *tm)
57 if (rtc_sh_get_time != null_rtc_get_time) {
61 rtc_time_to_tm(tv.tv_sec, tm);
66 EXPORT_SYMBOL(get_rtc_time);
68 int set_rtc_time(struct rtc_time *tm)
72 rtc_tm_to_time(tm, &secs);
73 return rtc_sh_set_time(secs);
75 EXPORT_SYMBOL(set_rtc_time);
77 static int __init rtc_generic_init(void)
79 struct platform_device *pdev;
81 if (rtc_sh_get_time == null_rtc_get_time)
84 pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
90 module_init(rtc_generic_init);
92 void (*board_time_init)(void);
94 unsigned long long sched_clock(void)
96 return (jiffies_64 - INITIAL_JIFFIES) * (NSEC_PER_SEC / HZ);
99 static void __init sh_late_time_init(void)
102 * Make sure all compiled-in early timers register themselves.
103 * Run probe() for one "earlytimer" device.
105 early_platform_driver_register_all("earlytimer");
106 early_platform_driver_probe("earlytimer", 1, 0);
109 void __init time_init(void)
116 rtc_sh_get_time(&xtime);
117 set_normalized_timespec(&wall_to_monotonic,
118 -xtime.tv_sec, -xtime.tv_nsec);
120 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
121 local_timer_setup(smp_processor_id());
124 late_time_init = sh_late_time_init;