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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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6fe32a4685
Presently the earlytimer probe handles the clockevents driver, which requires that the clockevents driver be registered first. This bumps it up by 1 to include the clocksource device, which can be safely ignored if it doesn't exist, as we will simply error out on that path and defer to the jiffies clocksource. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
121 lines
2.7 KiB
C
121 lines
2.7 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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/* 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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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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/*
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* Make sure all compiled-in early timers register themselves.
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*
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* Run probe() for two "earlytimer" devices, these will be the
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* clockevents and clocksource devices respectively. In the event
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* that only a clockevents device is available, we -ENODEV on the
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* clocksource and the jiffies clocksource is used transparently
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* instead. No error handling is necessary here.
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*/
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early_platform_driver_register_all("earlytimer");
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early_platform_driver_probe("earlytimer", 2, 0);
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}
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