1af2fe45fe
Now that all of the possible users for rtc_lock have gone away, it is no longer necessary to keep this lock definition around. This follows several other architectures that have either recently dropped it or never supported it in the first place. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
151 lines
3.2 KiB
C
151 lines
3.2 KiB
C
/*
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* arch/sh/kernel/time.c
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*
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* Copyright (C) 1999 Tetsuya Okada & Niibe Yutaka
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* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
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* Copyright (C) 2002 - 2009 Paul Mundt
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* Copyright (C) 2002 M. R. Brown <mrbrown@linux-sh.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/profile.h>
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#include <linux/timex.h>
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#include <linux/sched.h>
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#include <linux/clockchips.h>
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#include <linux/platform_device.h>
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#include <linux/smp.h>
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#include <linux/rtc.h>
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#include <asm/clock.h>
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#include <asm/rtc.h>
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#include <asm/timer.h>
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struct sys_timer *sys_timer;
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/* Dummy RTC ops */
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static void null_rtc_get_time(struct timespec *tv)
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{
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tv->tv_sec = mktime(2000, 1, 1, 0, 0, 0);
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tv->tv_nsec = 0;
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}
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static int null_rtc_set_time(const time_t secs)
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{
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return 0;
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}
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void (*rtc_sh_get_time)(struct timespec *) = null_rtc_get_time;
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int (*rtc_sh_set_time)(const time_t) = null_rtc_set_time;
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#ifdef CONFIG_GENERIC_CMOS_UPDATE
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unsigned long read_persistent_clock(void)
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{
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struct timespec tv;
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rtc_sh_get_time(&tv);
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return tv.tv_sec;
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}
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int update_persistent_clock(struct timespec now)
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{
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return rtc_sh_set_time(now.tv_sec);
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}
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#endif
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unsigned int get_rtc_time(struct rtc_time *tm)
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{
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if (rtc_sh_get_time != null_rtc_get_time) {
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struct timespec tv;
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rtc_sh_get_time(&tv);
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rtc_time_to_tm(tv.tv_sec, tm);
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}
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return RTC_24H;
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}
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EXPORT_SYMBOL(get_rtc_time);
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int set_rtc_time(struct rtc_time *tm)
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{
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unsigned long secs;
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rtc_tm_to_time(tm, &secs);
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return rtc_sh_set_time(secs);
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}
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EXPORT_SYMBOL(set_rtc_time);
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static int __init rtc_generic_init(void)
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{
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struct platform_device *pdev;
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if (rtc_sh_get_time == null_rtc_get_time)
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return -ENODEV;
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pdev = platform_device_register_simple("rtc-generic", -1, NULL, 0);
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if (IS_ERR(pdev))
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return PTR_ERR(pdev);
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return 0;
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}
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module_init(rtc_generic_init);
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void (*board_time_init)(void);
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struct clocksource clocksource_sh = {
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.name = "SuperH",
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};
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unsigned long long sched_clock(void)
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{
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unsigned long long cycles;
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/* jiffies based sched_clock if no clocksource is installed */
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if (!clocksource_sh.rating)
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return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ);
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cycles = clocksource_sh.read(&clocksource_sh);
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return cyc2ns(&clocksource_sh, cycles);
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}
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static void __init sh_late_time_init(void)
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{
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/*
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* Make sure all compiled-in early timers register themselves.
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* Run probe() for one "earlytimer" device.
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*/
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early_platform_driver_register_all("earlytimer");
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if (early_platform_driver_probe("earlytimer", 1, 0))
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return;
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/*
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* Find the timer to use as the system timer, it will be
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* initialized for us.
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*/
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sys_timer = get_sys_timer();
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if (unlikely(!sys_timer))
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panic("System timer missing.\n");
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printk(KERN_INFO "Using %s for system timer\n", sys_timer->name);
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}
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void __init time_init(void)
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{
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if (board_time_init)
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board_time_init();
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clk_init();
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rtc_sh_get_time(&xtime);
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set_normalized_timespec(&wall_to_monotonic,
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-xtime.tv_sec, -xtime.tv_nsec);
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#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
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local_timer_setup(smp_processor_id());
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#endif
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late_time_init = sh_late_time_init;
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}
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