linux-toradex.git/drivers/base/regmap/regmap-irq.c, branch v3.15.2

regmap: irq: Set data pointer only on regmap_add_irq_chip success

2014-03-13T21:47:36+00:00

After setting the 'data' pointer (wchich is returned to the caller for
freeing later) the regmap_add_irq_chip() could still fail for various
reasons (ENOMEM, regmap_read or regmap_write failure). In such case the
memory under 'data' was freed in error path and error value was returned
but the 'data' variable was not changed.

This could lead to errors if the caller passed such 'data' to
regmap_del_irq_chip().

The 'data' pointer should be changed atomically from the caller
perspective - set it only on regmap_add_irq_chip() success.

Signed-off-by: Krzysztof Kozlowski 
Signed-off-by: Mark Brown

regmap: irq: Remove domain on exit

2014-02-03T12:17:10+00:00

irqdomain now supports removal of domains on exit so we can properly clean
up on deletion of a regmap irqchip.

Signed-off-by: Mark Brown

regmap: irq: Allow using zero value for ack_base

2013-12-16T20:50:13+00:00

In some cases, clear interrupt register may be at address 0.
This patch allows to use such configurations by adding additional
configuration bit to indicate this.

[With doc fix from Levente Kurusa  -- broonie]

Signed-off-by: Alexander Shiyan 
Signed-off-by: Mark Brown

regmap: irq: clear status when disable irq

2013-10-22T12:28:08+00:00

clear the status bit if the mask register doesn't prevent
the chip level irq from being asserted

OR in the following sequence, there will be irq storm happens:
1) interrupt is triggered;
2) another thread disables it(the mask bit is set);
3) _Then_ the interrupt thread is not ACKed(the status bit is not cleared),
   and it's ignored;
4) if the irq is still asserted because of the uncleared status bit,
   the irq storm happens;

Signed-off-by: Yi Zhang 
Signed-off-by: Mark Brown

regmap: irq: Allow to acknowledge masked interrupts during initialization

2013-07-23T19:39:12+00:00

In case the hardware interrupt mask register does not prevent the chip level
irq from being asserted by the corresponding interrupt status bit, already
set interrupt bits should to be cleared once after masking them during
initialization. Add a flag to let drivers enable this behavior.

Signed-off-by: Philipp Zabel 
Signed-off-by: Mark Brown

regmap: irq: Clarify error message when we fail to request primary IRQ

2013-03-19T10:50:56+00:00

Display the name for the chip rather than just the primary IRQ so it is
clearer what exactly has failed.

Signed-off-by: Mark Brown

regmap: irq: call pm_runtime_put in pm_runtime_get_sync failed case

2013-03-01T06:54:16+00:00

Even in failed case of pm_runtime_get_sync, the usage_count
is incremented. In order to keep the usage_count with correct
value and runtime power management to behave correctly, call
pm_runtime_put(_sync) in such case.

Signed-off-by Liu Chuansheng 
Signed-off-by: Li Fei 
Signed-off-by: Mark Brown

regmap: irq: Support wake IRQ mask inversion

2013-01-04T20:53:44+00:00

Support devices which have an enable rather than mask register for wake
sources.

Signed-off-by: Mark Brown

regmap: irq: Fix sync of wake statuses to hardware

2013-01-04T20:53:43+00:00

This wasn't implemented but happened to work on test systems due to lack
of wake mask inversion support.

Signed-off-by: Mark Brown

regmap: irq: Use a bulk read for interrupt status where possible

2013-01-04T20:53:42+00:00

If the interrupt status registers are a single block of registers and the
chip supports bulk reads then do a single bulk read rather than pay the
extra I/O cost. This restores the original behaviour which was lost when
support for register striding was added.

Signed-off-by: Mark Brown