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>
24 #include <asm/hwblk.h>
28 static void null_rtc_get_time(struct timespec *tv)
30 tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0);
34 static int null_rtc_set_time(const time_t secs)
39 void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
40 int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
42 #ifdef CONFIG_GENERIC_CMOS_UPDATE
43 unsigned long read_persistent_clock(void)
50 int update_persistent_clock(struct timespec now)
52 return rtc_sh_set_time(now.tv_sec);
56 unsigned int get_rtc_time(struct rtc_time *tm)
58 if (rtc_sh_get_time != null_rtc_get_time) {
62 rtc_time_to_tm(tv.tv_sec, tm);
67 EXPORT_SYMBOL(get_rtc_time);
69 int set_rtc_time(struct rtc_time *tm)
73 rtc_tm_to_time(tm, &secs);
74 return rtc_sh_set_time(secs);
76 EXPORT_SYMBOL(set_rtc_time);
78 static int __init rtc_generic_init(void)
80 struct platform_device *pdev;
82 if (rtc_sh_get_time == null_rtc_get_time)
85 pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
91 module_init(rtc_generic_init);
93 void (*board_time_init)(void);
95 static void __init sh_late_time_init(void)
98 * Make sure all compiled-in early timers register themselves.
100 * Run probe() for two "earlytimer" devices, these will be the
101 * clockevents and clocksource devices respectively. In the event
102 * that only a clockevents device is available, we -ENODEV on the
103 * clocksource and the jiffies clocksource is used transparently
104 * instead. No error handling is necessary here.
106 early_platform_driver_register_all("earlytimer");
107 early_platform_driver_probe("earlytimer", 2, 0);
110 void __init time_init(void)
118 rtc_sh_get_time(&xtime);
119 set_normalized_timespec(&wall_to_monotonic,
120 -xtime.tv_sec, -xtime.tv_nsec);
122 late_time_init = sh_late_time_init;