Delta value must be updated on period/freq change, otherwise running timer
would be restarted (counter reloaded with old delta). Only m68k/mcf520x
and arm/arm_timer devices are currently doing freq change correctly, i.e.
stopping the timer. Perform delta update to fix affected devices and
eliminate potential further mistakes.
Signed-off-by: Dmitry Osipenko <dig...@gmail.com>
---
hw/core/ptimer.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/hw/core/ptimer.c b/hw/core/ptimer.c
index 96a6c7a..8c2dd9f 100644
--- a/hw/core/ptimer.c
+++ b/hw/core/ptimer.c
@@ -207,6 +207,7 @@ void ptimer_stop(ptimer_state *s)
/* Set counter increment interval in nanoseconds. */
void ptimer_set_period(ptimer_state *s, int64_t period)
{
+ s->delta = ptimer_get_count(s);
s->period = period;
s->period_frac = 0;
if (s->enabled) {
@@ -218,6 +219,7 @@ void ptimer_set_period(ptimer_state *s, int64_t period)
/* Set counter frequency in Hz. */
void ptimer_set_freq(ptimer_state *s, uint32_t freq)
{
+ s->delta = ptimer_get_count(s);
s->period = 1000000000ll / freq;
s->period_frac = (1000000000ll << 32) / freq;
if (s->enabled) {
--
2.6.4
