Change DM(date mode) and 24/12 control bit don't affect the internal registers.
It only indicates what format is using for those registers. So we don't need to
update time format when it is modified.
Signed-off-by: Yang Zhang <yang.z.zh...@intel.com>
---
hw/mc146818rtc.c | 10 +---------
1 files changed, 1 insertions(+), 9 deletions(-)
diff --git a/hw/mc146818rtc.c b/hw/mc146818rtc.c
index a46fdfc..9b49cbc 100644
--- a/hw/mc146818rtc.c
+++ b/hw/mc146818rtc.c
@@ -252,15 +252,7 @@ static void cmos_ioport_write(void *opaque, uint32_t addr,
uint32_t data)
rtc_set_time(s);
}
}
- if (((s->cmos_data[RTC_REG_B] ^ data) & (REG_B_DM | REG_B_24H)) &&
- !(data & REG_B_SET)) {
- /* If the time format has changed and not in set mode,
- update the registers immediately. */
- s->cmos_data[RTC_REG_B] = data;
- rtc_copy_date(s);
- } else {
- s->cmos_data[RTC_REG_B] = data;
- }
+ s->cmos_data[RTC_REG_B] = data;
rtc_timer_update(s, qemu_get_clock_ns(rtc_clock));
break;
case RTC_REG_C:
--
1.7.1
