linux-toradex.git/drivers/rtc/rtc-at91rm9200.c, branch v4.6-rc7

rtc: at91rm9200: clear RTC alarm status flag prior to suspending

2015-11-08T13:12:28+00:00

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 
Signed-off-by: Alexandre Belloni

rtc: at91rm9200: get and use slow clock

2015-09-05T11:19:09+00:00

Commit dca1a4b5ff6e ("clk: at91: keep slow clk enabled to prevent system
hang") added a workaround for the slow clock as it is not properly handled
by its users.

Get and use the slow clock as it is necessary for the at91rm9200 rtc.

Acked-by: Boris Brezillon 
Signed-off-by: Alexandre Belloni

rtc: at91rm9200: sort headers alphabetically

2015-09-05T11:19:09+00:00

Sort included headers alphabetically.

Signed-off-by: Alexandre Belloni 
Acked-by: Boris Brezillon 
Acked-by: Nicolas Ferre

drivers/rtc/rtc-at91rm9200.c: make IO endian agnostic

2015-04-17T13:04:12+00:00

Change the __raw IO calls to readl/write_relaxed which makes the driver
endian agnostic to run properly on big endian systems.

Signed-off-by: Ben Dooks 
Cc: Alessandro Zummo 
Cc: Andrew Victor 
Acked-by: Nicolas Ferre 
Acked-by: Jean-Christophe PLAGNIOL-VILLARD 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: at91rm9200: double locking bug in at91_rtc_interrupt()

2015-03-18T00:58:16+00:00

There is a typo here so we deadlock.

Fixes: dd1f1f391dd7 ('rtc: at91rm9200: rework wakeup and interrupt handling')
Signed-off-by: Dan Carpenter 
Acked-by: Boris Brezillon 
Reported-by: David Dueck 
Signed-off-by: Nicolas Ferre 
Signed-off-by: Rafael J. Wysocki

rtc: at91rm9200: rework wakeup and interrupt handling

2015-03-04T21:11:07+00:00

The IRQ line used by the RTC device is usually shared with the system
timer (PIT) on at91 platforms.

Since timers are registering their handlers with IRQF_NO_SUSPEND, we
should expect being called in suspended state, and properly wake the
system up when this is the case.

Set IRQF_COND_SUSPEND flag when registering the IRQ handler to inform
irq core that it can safely be called while the system is suspended.

Signed-off-by: Boris Brezillon 
Reviewed-by: Alexandre Belloni 
Acked-by: Nicolas Ferre 
Acked-by: Mark Rutland 
Signed-off-by: Rafael J. Wysocki

rtc: drop owner assignment from platform_drivers

2014-10-20T14:21:31+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

rtc: rtc-at91rm9200: fix infinite wait for ACKUPD irq

2014-06-06T23:08:08+00:00

The rtc user must wait at least 1 sec between each time/calandar update
(see atmel's datasheet chapter "Updating Time/Calendar").

Use the 1Hz interrupt to update the at91_rtc_upd_rdy flag and wait for
the at91_rtc_wait_upd_rdy event if the rtc is not ready.

This patch fixes a deadlock in an uninterruptible wait when the RTC is
updated more than once every second.  AFAICT the bug is here from the
beginning, but I think we should at least backport this fix to 3.10 and
the following longterm and stable releases.

Signed-off-by: Boris BREZILLON 
Reported-by: Bryan Evenson 
Tested-by: Bryan Evenson 
Cc: Andrew Victor 
Cc: Nicolas Ferre 
Cc: Jean-Christophe Plagniol-Villard 
Cc: Alessandro Zummo 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rtc/rtc-at91rm9200.c: correct alarm over day/month wrap

2013-12-13T02:19:26+00:00

Update month and day of month to the alarm month/day instead of current
day/month when setting the RTC alarm mask.

Signed-off-by: Linus Pizunski 
Signed-off-by: Nicolas Ferre 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

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

2013-11-22T00:42:27+00:00

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: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: Jean-Christophe Plagniol-Villard 
Cc: Andrew Victor 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds