Staging: IIO: Trigger support added to core.

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Add general registration support for IIO triggers.  These
are currently only used to initialize a 'poll' of a given
device.  Examples include the lis3l02dq's data ready signal
being used to initialize a read and gpio triggers being
used to allow externally synchronized sensor reading.

Each trigger can cause any number of 'consumer' devices
to be polled with each storing data into a related ring
buffer.

Two stage triggering is supported with 'fast' and 'slow'
paths.  The first is used for things like pulling a data
hold line high and the second for actual read which
may take far longer.

Changes since V2:
* As with IIO triggers now use a registration approach
  much closer to that of input leading to cleaner code.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

...

This commit is contained in:

Jonathan Cameron 2009-08-18 18:06:26 +01:00 • committed by Greg Kroah-Hartman

parent 574fb258d6

commit 1637db4441

5 changed files with 579 additions and 1 deletions

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8

drivers/staging/iio/Kconfig

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1

drivers/staging/iio/Makefile

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399

drivers/staging/iio/industrialio-trigger.c

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151

drivers/staging/iio/trigger.h

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21

drivers/staging/iio/trigger_consumer.h

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