Commit 51a0d036 authored by Johan Hovold's avatar Johan Hovold Committed by Linus Torvalds
Browse files

ARM: drivers/rtc/rtc-at91rm9200.c: disable interrupts at shutdown

Make sure RTC-interrupts are disabled at shutdown.

As the RTC is generally powered by backup power (VDDBU), its interrupts
are not disabled on wake-up, user, watchdog or software reset.  This
could cause troubles on other systems (e.g.  older kernels) if an
interrupt occurs before a handler has been installed at next boot.

Let us be well-behaved and disable them on clean shutdowns at least (as
do the RTT-based rtc-at91sam9 driver).
Signed-off-by: default avatarJohan Hovold <>
Acked-by: default avatarNicolas Ferre <>
Cc: Jean-Christophe Plagniol-Villard <>
Cc: Andrew Victor <>
Cc: Alessandro Zummo <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 27c73ae7
......@@ -428,6 +428,14 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
return 0;
static void at91_rtc_shutdown(struct platform_device *pdev)
/* Disable all interrupts */
at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
/* AT91RM9200 RTC Power management control */
......@@ -466,6 +474,7 @@ static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
static struct platform_driver at91_rtc_driver = {
.remove = __exit_p(at91_rtc_remove),
.shutdown = at91_rtc_shutdown,
.driver = {
.name = "at91_rtc",
.owner = THIS_MODULE,
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