From: Huacai Chen chenhc@lemote.com
[ Upstream commit 22f8d5a1bf230cf8567a4121fc3789babb46336d ]
When use goldfish rtc, the "hwclock" command fails with "select() to /dev/rtc to wait for clock tick timed out". This is because "hwclock" need the set_alarm() hook to enable interrupt when alrm->enabled is true. This operation is missing in goldfish rtc (but other rtc drivers, such as cmos rtc, enable interrupt here), so add it.
Signed-off-by: Huacai Chen chenhc@lemote.com Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Link: https://lore.kernel.org/r/1592654683-31314-1-git-send-email-chenhc@lemote.co... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/rtc/rtc-goldfish.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c index cb6b0ad7ec3f2..5dd92147f1680 100644 --- a/drivers/rtc/rtc-goldfish.c +++ b/drivers/rtc/rtc-goldfish.c @@ -73,6 +73,7 @@ static int goldfish_rtc_set_alarm(struct device *dev, rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC; writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH); writel(rtc_alarm64, base + TIMER_ALARM_LOW); + writel(1, base + TIMER_IRQ_ENABLED); } else { /* * if this function was called with enabled=0