| Message ID | 1444639163-14255-1-git-send-email-wenyou.yang@atmel.com |
|---|---|
| State | Accepted |
| Headers | show |
On 12/10/2015 at 16:39:23 +0800, Wenyou Yang wrote : > As said in the SAMA5D2 datasheet, "Prior to instructing the device > to enter ULP mode 1, ... and the internal sources of wake-up must > be cleared." > > This patch is to clear the RTC alarm status flag prior to suspending > to avoid the erroneous wake-up activity, as it is often used as > the wake-up source for the ULP mode 1. > > Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> > --- > > Changes in v2: > - Add more detail commit log. > > drivers/rtc/rtc-at91rm9200.c | 2 ++ > 1 file changed, 2 insertions(+) > Applied, thanks.
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index cb62e21..b60fd47 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -495,6 +495,8 @@ static int at91_rtc_suspend(struct device *dev) /* this IRQ is shared with DBGU and other hardware which isn't * necessarily doing PM like we are... */ + at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); + at91_rtc_imr = at91_rtc_read_imr() & (AT91_RTC_ALARM|AT91_RTC_SECEV); if (at91_rtc_imr) {
As said in the SAMA5D2 datasheet, "Prior to instructing the device to enter ULP mode 1, ... and the internal sources of wake-up must be cleared." This patch is to clear the RTC alarm status flag prior to suspending to avoid the erroneous wake-up activity, as it is often used as the wake-up source for the ULP mode 1. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> --- Changes in v2: - Add more detail commit log. drivers/rtc/rtc-at91rm9200.c | 2 ++ 1 file changed, 2 insertions(+)