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Subject[tip:timers/cleanup] frv: Convert frv to use read/update_persistent_clock
Commit-ID:  739b27116a0e6903d6c85d6769e69f43d8fa4128
Gitweb: http://git.kernel.org/tip/739b27116a0e6903d6c85d6769e69f43d8fa4128
Author: John Stultz <johnstul@us.ibm.com>
AuthorDate: Wed, 3 Mar 2010 19:57:18 -0800
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Sat, 13 Mar 2010 01:14:09 +0100

frv: Convert frv to use read/update_persistent_clock

This patch converts the frv 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: David Howells <dhowells@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1267675049-12337-4-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/frv/kernel/time.c | 34 +++++++---------------------------
1 files changed, 7 insertions(+), 27 deletions(-)
diff --git a/arch/frv/kernel/time.c b/arch/frv/kernel/time.c
index fb0ce75..0ddbbae 100644
--- a/arch/frv/kernel/time.c
+++ b/arch/frv/kernel/time.c
@@ -48,20 +48,12 @@ static struct irqaction timer_irq = {
.name = "timer",
};

-static inline int set_rtc_mmss(unsigned long nowtime)
-{
- return -1;
-}
-
/*
* timer_interrupt() needs to keep up the real-time clock,
* as well as call the "do_timer()" routine every clocktick
*/
static irqreturn_t timer_interrupt(int irq, void *dummy)
{
- /* last time the cmos clock got updated */
- static long last_rtc_update = 0;
-
profile_tick(CPU_PROFILING);
/*
* Here we are in the timer irq handler. We just have irqs locally
@@ -74,22 +66,6 @@ static irqreturn_t timer_interrupt(int irq, void *dummy)

do_timer(1);

- /*
- * 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.
- */
- 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
- last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
- }
-
#ifdef CONFIG_HEARTBEAT
static unsigned short n;
n++;
@@ -119,7 +95,8 @@ void time_divisor_init(void)
__set_TCSR_DATA(0, base >> 8);
}

-void time_init(void)
+
+void read_persistent_clock(struct timespec *ts)
{
unsigned int year, mon, day, hour, min, sec;

@@ -135,9 +112,12 @@ void time_init(void)

if ((year += 1900) < 1970)
year += 100;
- xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
- xtime.tv_nsec = 0;
+ ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+ ts->tv_nsec = 0;
+}

+void time_init(void)
+{
/* install scheduling interrupt handler */
setup_irq(IRQ_CPU_TIMER0, &timer_irq);


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