@@ -79,6 +79,23 @@ static uint64_t a10_pit_read(void *opaque, hwaddr offset, unsigned size)
return 0;
}
+static void a10_pit_set_freq(AwA10PITState *s, int index)
+{
+ uint32_t prescaler, source;
+ uint32_t source_freqs[] = {32768, 24000000};
+
+ prescaler = 1 << extract32(s->control[index], 4, 3);
+ source = extract32(s->control[index], 2, 2);
+
+ if (source > 1) {
+ qemu_log_mask(LOG_UNIMP, "%s: unimplemented clock source %d",
+ __func__, source);
+ source = 0;
+ }
+
+ ptimer_set_freq(s->timer[index], source_freqs[source] / prescaler);
+}
+
static void a10_pit_write(void *opaque, hwaddr offset, uint64_t value,
unsigned size)
{
@@ -101,6 +118,7 @@ static void a10_pit_write(void *opaque, hwaddr offset, uint64_t value,
switch (offset & 0x0f) {
case AW_A10_PIT_TIMER_CONTROL:
s->control[index] = value;
+ a10_pit_set_freq(s, index);
if (s->control[index] & AW_A10_PIT_TIMER_RELOAD) {
ptimer_set_count(s->timer[index], s->interval[index]);
}
@@ -244,7 +262,6 @@ static void a10_pit_init(Object *obj)
tc->index = i;
bh[i] = qemu_bh_new(a10_pit_timer_cb, tc);
s->timer[i] = ptimer_init(bh[i]);
- ptimer_set_freq(s->timer[i], 240000);
}
}
This implements the prescaler and source fields of the timer control register as described in the A10 user manual. Signed-off-by: Beniamino Galvani <b.galvani@gmail.com> --- hw/timer/allwinner-a10-pit.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)