linux-toradex.git/drivers/rtc/rtc-at91rm9200.c, branch v3.11

rtc: rtc-at91rm9200: remove unnecessary platform_set_drvdata()

2013-07-03T23:07:49+00:00

The driver core clears the driver data to NULL after device_release or
on probe failure, since commit 0998d063100 ("device-core: Ensure drvdata
= NULL when no driver is bound").  Thus, it is not needed to manually
clear the device driver data to NULL.

Signed-off-by: Jingoo Han 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rtc/rtc-at91rm9200.c: include

2013-07-03T23:07:46+00:00

Silences the following checkpatch warning:
  WARNING: Use #include  instead of 

Signed-off-by: Sachin Kamat 
Cc: Andrew Victor 
Cc: Jingoo Han 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc-at91rm9200: use shadow IMR on at91sam9x5

2013-06-12T23:29:46+00:00

Add support for the at91sam9x5-family which must use the shadow
interrupt mask due to a hardware issue (causing RTC_IMR to always be
zero).

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: Douglas Gilbert 
Cc: Jean-Christophe PLAGNIOL-VILLARD 
Cc: Ludovic Desroches 
Cc: Robert Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc-at91rm9200: add shadow interrupt mask

2013-06-12T23:29:46+00:00

Add shadow interrupt-mask register which can be used on SoCs where the
actual hardware register is broken.

Note that some care needs to be taken to make sure the shadow mask
corresponds to the actual hardware state.  The added overhead is not an
issue for the non-broken SoCs due to the relatively infrequent
interrupt-mask updates.  We do, however, only use the shadow mask value
as a fall-back when it actually needed as there is still a theoretical
possibility that the mask is incorrect (see the code for details).

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: Douglas Gilbert 
Cc: Jean-Christophe PLAGNIOL-VILLARD 
Cc: Ludovic Desroches 
Cc: Robert Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc-at91rm9200: refactor interrupt-register handling

2013-06-12T23:29:46+00:00

Add accessors for the interrupt register.

This will allow us to easily add a shadow interrupt-mask register to use
on SoCs where the interrupt-mask register cannot be used.

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: Douglas Gilbert 
Cc: Jean-Christophe PLAGNIOL-VILLARD 
Cc: Ludovic Desroches 
Cc: Robert Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc-at91rm9200: add configuration support

2013-06-12T23:29:45+00:00

Add configuration support which can be used to implement SoC-specific
workarounds for broken hardware.

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: Douglas Gilbert 
Cc: Jean-Christophe PLAGNIOL-VILLARD 
Cc: Ludovic Desroches 
Cc: Robert Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc-at91rm9200: add match-table compile guard

2013-06-12T23:29:45+00:00

The members of Atmel's at91sam9x5 family (9x5) have a broken RTC
interrupt mask register (AT91_RTC_IMR).  It does not reflect enabled
interrupts but instead always returns zero.

The kernel's rtc-at91rm9200 driver handles the RTC for the 9x5 family.
Currently when the date/time is set, an interrupt is generated and this
driver neglects to handle the interrupt.  The kernel complains about the
un-handled interrupt and disables it henceforth.  This not only breaks
the RTC function, but since that interrupt is shared (Atmel's SYS
interrupt) then other things break as well (e.g.  the debug port no
longer accepts characters).

Tested on the at91sam9g25.  Bug confirmed by Atmel.

This patch (of 5):

Add missing match-table compile guard.

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: Douglas Gilbert 
Cc: Jean-Christophe PLAGNIOL-VILLARD 
Cc: Ludovic Desroches 
Cc: Robert Nelson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rtc/rtc-at91rm9200.c: fix missing iounmap

2013-04-30T01:28:40+00:00

Add missing iounmap to probe error path and remove.

Signed-off-by: Johan Hovold 
Acked-by: Nicolas Ferre 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rtc/rtc-at91rm9200.c: add DT support

2013-04-30T01:28:34+00:00

Signed-off-by: Joachim Eastwood 
Acked-by: Nicolas Ferre 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: rtc-at91rm9200: switch to using SIMPLE_DEV_PM_OPS

2013-04-30T01:28:32+00:00

Switch to using the SIMPLE_DEV_PM_OPS macro to declare the driver's
pm_ops.  It reduces code size.

Signed-off-by: Jingoo Han 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds