diff options
| author | Magnus Damm <damm@opensource.se> | 2010-08-04 08:31:38 +0400 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-08-04 11:01:24 +0400 |
| commit | 43809473b9d5fa9f82bf64ddeb3c21fe1140ef0e (patch) | |
| tree | 9869cb6b077a8e2096964b26984301a62d9756cb /drivers | |
| parent | 7b42176a2969bc913cd2949e7edd935466745b11 (diff) | |
| download | linux-43809473b9d5fa9f82bf64ddeb3c21fe1140ef0e.tar.xz | |
clocksource: sh_cmt: One-off clockevent fix V2
Fix a one-off error in the CMT driver V2. The match register
should be programmed with the period minus one.
Many thanks to Eiraku-san for tracking down this issue.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clocksource/sh_cmt.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index 717305d30444..ed8e07b97e27 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -308,7 +308,7 @@ static irqreturn_t sh_cmt_interrupt(int irq, void *dev_id) * isr before we end up here. */ if (p->flags & FLAG_CLOCKSOURCE) - p->total_cycles += p->match_value; + p->total_cycles += p->match_value + 1; if (!(p->flags & FLAG_REPROGRAM)) p->next_match_value = p->max_match_value; @@ -403,7 +403,7 @@ static cycle_t sh_cmt_clocksource_read(struct clocksource *cs) raw = sh_cmt_get_counter(p, &has_wrapped); if (unlikely(has_wrapped)) - raw += p->match_value; + raw += p->match_value + 1; spin_unlock_irqrestore(&p->lock, flags); return value + raw; @@ -478,7 +478,7 @@ static void sh_cmt_clock_event_start(struct sh_cmt_priv *p, int periodic) ced->min_delta_ns = clockevent_delta2ns(0x1f, ced); if (periodic) - sh_cmt_set_next(p, (p->rate + HZ/2) / HZ); + sh_cmt_set_next(p, ((p->rate + HZ/2) / HZ) - 1); else sh_cmt_set_next(p, p->max_match_value); } @@ -523,9 +523,9 @@ static int sh_cmt_clock_event_next(unsigned long delta, BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT); if (likely(p->flags & FLAG_IRQCONTEXT)) - p->next_match_value = delta; + p->next_match_value = delta - 1; else - sh_cmt_set_next(p, delta); + sh_cmt_set_next(p, delta - 1); return 0; } |