79714acbab
This patch is the hwblk base implementation, containing structures and shared functions dealing with hardware blocks. A each processor model should provide a list of hwblks and describe which module stop bit that is associated with each hwblck and how the hwblks are grouped together into areas. The shared code keeps track of the usage count for each hwblk and the areas. Fallback implementations for processor specific code are also kept as weak symbols. The clock framework, the runtime pm code and cpuidle will all tie into this hwblk implementation. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
123 lines
2.8 KiB
C
123 lines
2.8 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/hwblk.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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hwblk_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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