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ep93xx timer: Fix resolution of get_ticks()

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ep93xx timer: Make get_ticks() return a value in CONFIG_SYS_HZ resolution,
as announced by get_tbclk()

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
This commit is contained in:
Matthias Kaehlcke 2010-03-09 22:13:33 +01:00 committed by trix
parent 39ecbfcce0
commit dea86bb9aa
1 changed files with 9 additions and 6 deletions
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15
cpu/arm920t/ep93xx/timer.c
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@ -69,7 +69,7 @@ static inline unsigned long read_timer(void)
} }
/* /*
* timer without interrupts * Get the number of ticks (in CONFIG_SYS_HZ resolution)
*/ */
unsigned long long get_ticks(void) unsigned long long get_ticks(void)
{ {
@ -83,12 +83,12 @@ unsigned long long get_ticks(void)
timer.last_update = now; timer.last_update = now;
return timer.ticks; return clk_to_systicks(timer.ticks);
} }
unsigned long get_timer_masked(void) unsigned long get_timer_masked(void)
{ {
return clk_to_systicks(get_ticks()); return get_ticks();
} }
unsigned long get_timer(unsigned long base) unsigned long get_timer(unsigned long base)
@ -109,10 +109,13 @@ void reset_timer(void)
void __udelay(unsigned long usec) void __udelay(unsigned long usec)
{ {
const unsigned long target = get_ticks() + usecs_to_ticks(usec); /* read the timer and update timer.ticks */
get_ticks();
while (get_ticks() < target) const unsigned long long target = timer.ticks + usecs_to_ticks(usec);
/* noop */;
while (timer.ticks < target)
get_ticks();
} }
int timer_init(void) int timer_init(void)