From: Martin Blumenstingl martin.blumenstingl@googlemail.com
[ Upstream commit 0e6255fa3f649170da6bd1a544680589cfae1131 ]
The VRTC alarm register can be programmed with an amount of seconds after which the SoC will be woken up by the VRTC timer again. We are already converting the alarm time from meson_vrtc_set_alarm() to "seconds since 1970". This means we also need to use "seconds since 1970" for the current time.
This fixes a problem where setting the alarm to one minute in the future results in the firmware (which handles wakeup) to output (on the serial console) that the system will be woken up in billions of seconds. ktime_get_raw_ts64() returns the time since boot, not since 1970. Switch to ktime_get_real_ts64() to fix the calculation of the alarm time and to make the SoC wake up at the specified date/time. Also the firmware (which manages suspend) now prints either 59 or 60 seconds until wakeup (depending on how long it takes for the system to enter suspend).
Fixes: 6ef35398e827 ("rtc: Add Amlogic Virtual Wake RTC") Signed-off-by: Martin Blumenstingl martin.blumenstingl@googlemail.com Reviewed-by: Neil Armstrong neil.armstrong@linaro.org Reviewed-by: Kevin Hilman khilman@baylibre.com Link: https://lore.kernel.org/r/20230320212142.2355062-1-martin.blumenstingl@googl... Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/rtc/rtc-meson-vrtc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-meson-vrtc.c b/drivers/rtc/rtc-meson-vrtc.c index 1463c86215615..648fa362ec447 100644 --- a/drivers/rtc/rtc-meson-vrtc.c +++ b/drivers/rtc/rtc-meson-vrtc.c @@ -23,7 +23,7 @@ static int meson_vrtc_read_time(struct device *dev, struct rtc_time *tm) struct timespec64 time;
dev_dbg(dev, "%s\n", __func__); - ktime_get_raw_ts64(&time); + ktime_get_real_ts64(&time); rtc_time64_to_tm(time.tv_sec, tm);
return 0; @@ -96,7 +96,7 @@ static int __maybe_unused meson_vrtc_suspend(struct device *dev) long alarm_secs; struct timespec64 time;
- ktime_get_raw_ts64(&time); + ktime_get_real_ts64(&time); local_time = time.tv_sec;
dev_dbg(dev, "alarm_time = %lus, local_time=%lus\n",