[linux-2.6-block.git] / arch / sh / kernel / time.c

/*
 *  arch/sh/kernel/time.c
 *
 *  Copyright (C) 1999  Tetsuya Okada & Niibe Yutaka
 *  Copyright (C) 2000  Philipp Rumpf <prumpf@tux.org>
 *  Copyright (C) 2002 - 2009  Paul Mundt
 *  Copyright (C) 2002  M. R. Brown  <mrbrown@linux-sh.org>
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/profile.h>
#include <linux/timex.h>
#include <linux/sched.h>
#include <linux/clockchips.h>
#include <linux/platform_device.h>
#include <linux/smp.h>
#include <linux/rtc.h>
#include <asm/clock.h>
#include <asm/rtc.h>

/* Dummy RTC ops */
static void null_rtc_get_time(struct timespec *tv)
{
	tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0);
	tv->tv_nsec = 0;
}

static int null_rtc_set_time(const time_t secs)
{
	return 0;
}

void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;

void read_persistent_clock(struct timespec *ts)
{
	rtc_sh_get_time(ts);
}

#ifdef CONFIG_GENERIC_CMOS_UPDATE
int update_persistent_clock(struct timespec now)
{
	return rtc_sh_set_time(now.tv_sec);
}
#endif

unsigned int get_rtc_time(struct rtc_time *tm)
{
	if (rtc_sh_get_time != null_rtc_get_time) {
		struct timespec tv;

		rtc_sh_get_time(&tv);
		rtc_time_to_tm(tv.tv_sec, tm);
	}

	return RTC_24H;
}
EXPORT_SYMBOL(get_rtc_time);

int set_rtc_time(struct rtc_time *tm)
{
	unsigned long secs;

	rtc_tm_to_time(tm, &secs);
	return rtc_sh_set_time(secs);
}
EXPORT_SYMBOL(set_rtc_time);

static int __init rtc_generic_init(void)
{
	struct platform_device *pdev;

	if (rtc_sh_get_time == null_rtc_get_time)
		return -ENODEV;

	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);

	return PTR_ERR_OR_ZERO(pdev);
}
module_init(rtc_generic_init);

void (*board_time_init)(void);

static void __init sh_late_time_init(void)
{
	/*
	 * Make sure all compiled-in early timers register themselves.
	 *
	 * Run probe() for two "earlytimer" devices, these will be the
	 * clockevents and clocksource devices respectively. In the event
	 * that only a clockevents device is available, we -ENODEV on the
	 * clocksource and the jiffies clocksource is used transparently
	 * instead. No error handling is necessary here.
	 */
	early_platform_driver_register_all("earlytimer");
	early_platform_driver_probe("earlytimer", 2, 0);
}

void __init time_init(void)
{
	if (board_time_init)
		board_time_init();

	clk_init();

	late_time_init = sh_late_time_init;
}
Commit	Line	Data
1da177e4	1	/*
5ac54964	2	* arch/sh/kernel/time.c
1da177e4 LT	3	*
	4	* Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
	5	* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
42786006	6	* Copyright (C) 2002 - 2009 Paul Mundt
1da177e4 LT	7	* Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
1da177e4 LT	8	*
5ac54964 PM	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
	11	* for more details.
1da177e4	12	*/
1da177e4	13	#include <linux/kernel.h>
36ddf31b	14	#include <linux/module.h>
1da177e4	15	#include <linux/init.h>
1da177e4	16	#include <linux/profile.h>
65e5d90d PM	17	#include <linux/timex.h>
65e5d90d PM	18	#include <linux/sched.h>
57be2b48	19	#include <linux/clockchips.h>
eaab8919	20	#include <linux/platform_device.h>
8c24594d	21	#include <linux/smp.h>
47c8a08b	22	#include <linux/rtc.h>
36ddf31b	23	#include <asm/clock.h>
1da177e4	24	#include <asm/rtc.h>
36ddf31b	25
91550f71 PM	26	/* Dummy RTC ops */
	27	static void null_rtc_get_time(struct timespec *tv)
	28	{
	29	tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0);
	30	tv->tv_nsec = 0;
	31	}
	32
	33	static int null_rtc_set_time(const time_t secs)
	34	{
	35	return 0;
	36	}
	37
	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;
6d134b9e	40
d4f587c6	41	void read_persistent_clock(struct timespec *ts)
6d134b9e	42	{
0ceb4c3e	43	rtc_sh_get_time(ts);
6d134b9e PM	44	}
6d134b9e PM	45
0272282f	46	#ifdef CONFIG_GENERIC_CMOS_UPDATE
6d134b9e PM	47	int update_persistent_clock(struct timespec now)
	48	{
	49	return rtc_sh_set_time(now.tv_sec);
	50	}
	51	#endif
1da177e4	52
47c8a08b PM	53	unsigned int get_rtc_time(struct rtc_time *tm)
	54	{
	55	if (rtc_sh_get_time != null_rtc_get_time) {
	56	struct timespec tv;
	57
	58	rtc_sh_get_time(&tv);
	59	rtc_time_to_tm(tv.tv_sec, tm);
	60	}
	61
	62	return RTC_24H;
	63	}
	64	EXPORT_SYMBOL(get_rtc_time);
	65
	66	int set_rtc_time(struct rtc_time *tm)
	67	{
	68	unsigned long secs;
	69
	70	rtc_tm_to_time(tm, &secs);
	71	return rtc_sh_set_time(secs);
	72	}
	73	EXPORT_SYMBOL(set_rtc_time);
	74
42786006 PM	75	static int __init rtc_generic_init(void)
	76	{
	77	struct platform_device *pdev;
	78
	79	if (rtc_sh_get_time == null_rtc_get_time)
	80	return -ENODEV;
	81
	82	pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
42786006	83
7c036821	84	return PTR_ERR_OR_ZERO(pdev);
42786006 PM	85	}
	86	module_init(rtc_generic_init);
	87
57be2b48	88	void (*board_time_init)(void);
bd156147	89
82b24221	90	static void __init sh_late_time_init(void)
8e0b8429	91	{
1d29ebeb PM	92	/*
1d29ebeb PM	93	* Make sure all compiled-in early timers register themselves.
6fe32a46 PM	94	*
	95	* Run probe() for two "earlytimer" devices, these will be the
	96	* clockevents and clocksource devices respectively. In the event
	97	* that only a clockevents device is available, we -ENODEV on the
	98	* clocksource and the jiffies clocksource is used transparently
	99	* instead. No error handling is necessary here.
1d29ebeb PM	100	*/
1d29ebeb PM	101	early_platform_driver_register_all("earlytimer");
6fe32a46	102	early_platform_driver_probe("earlytimer", 2, 0);
8e0b8429	103	}
82b24221	104
8e0b8429 MD	105	void __init time_init(void)
	106	{
	107	if (board_time_init)
	108	board_time_init();
	109
	110	clk_init();
	111
82b24221	112	late_time_init = sh_late_time_init;
8e0b8429	113	}