aboutsummaryrefslogtreecommitdiff
path: root/arch/m32r
diff options
context:
space:
mode:
authorJohn Stultz <johnstul@us.ibm.com>2010-03-03 19:57:25 -0800
committerThomas Gleixner <tglx@linutronix.de>2010-03-13 01:14:12 +0100
commit944694716d6ea3c274a73c830bf33e194bad4bcd (patch)
tree3d89f85a95148eabdf99ab1000247bb7a7cc2019 /arch/m32r
parentcb0e996378900fa05d5c779d6bfa52d55ebc3407 (diff)
downloadlinux-2.6.34-ux500-944694716d6ea3c274a73c830bf33e194bad4bcd.tar.gz
m32r: Convert m32r to use read/update_peristent_clock
This patch converts the m32r architecture to use the generic read_persistent_clock and update_persistent_clock interfaces, reducing the amount of arch specific code we have to maintain, and allowing for further cleanups in the future. I have not built or tested this patch, so help from arch maintainers would be appreciated. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <1267675049-12337-11-git-send-email-johnstul@us.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/m32r')
-rw-r--r--arch/m32r/kernel/time.c47
1 files changed, 7 insertions, 40 deletions
diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c
index 9cedcef1157..bda86820bff 100644
--- a/arch/m32r/kernel/time.c
+++ b/arch/m32r/kernel/time.c
@@ -106,24 +106,6 @@ u32 arch_gettimeoffset(void)
}
/*
- * In order to set the CMOS clock precisely, set_rtc_mmss has to be
- * called 500 ms after the second nowtime has started, because when
- * nowtime is written into the registers of the CMOS clock, it will
- * jump to the next second precisely 500 ms later. Check the Motorola
- * MC146818A or Dallas DS12887 data sheet for details.
- *
- * BUG: This routine does not handle hour overflow properly; it just
- * sets the minutes. Usually you won't notice until after reboot!
- */
-static inline int set_rtc_mmss(unsigned long nowtime)
-{
- return 0;
-}
-
-/* last time the cmos clock got updated */
-static long last_rtc_update = 0;
-
-/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick
*/
@@ -138,23 +120,6 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
#ifndef CONFIG_SMP
update_process_times(user_mode(get_irq_regs()));
#endif
- /*
- * If we have an externally synchronized Linux clock, then update
- * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be
- * called as close as possible to 500 ms before the new second starts.
- */
- write_seqlock(&xtime_lock);
- if (ntp_synced()
- && xtime.tv_sec > last_rtc_update + 660
- && (xtime.tv_nsec / 1000) >= 500000 - ((unsigned)TICK_SIZE) / 2
- && (xtime.tv_nsec / 1000) <= 500000 + ((unsigned)TICK_SIZE) / 2)
- {
- if (set_rtc_mmss(xtime.tv_sec) == 0)
- last_rtc_update = xtime.tv_sec;
- else /* do it again in 60 s */
- last_rtc_update = xtime.tv_sec - 600;
- }
- write_sequnlock(&xtime_lock);
/* As we return to user mode fire off the other CPU schedulers..
this is basically because we don't yet share IRQ's around.
This message is rigged to be safe on the 386 - basically it's
@@ -174,7 +139,7 @@ static struct irqaction irq0 = {
.name = "MFT2",
};
-void __init time_init(void)
+void read_persistent_clock(struct timespec *ts)
{
unsigned int epoch, year, mon, day, hour, min, sec;
@@ -194,11 +159,13 @@ void __init time_init(void)
epoch = 1952;
year += epoch;
- xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
- xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
- set_normalized_timespec(&wall_to_monotonic,
- -xtime.tv_sec, -xtime.tv_nsec);
+ ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+ ts->tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
+}
+
+void __init time_init(void)
+{
#if defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_XNUX2) \
|| defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_M32700) \
|| defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_M32104)