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Documentation: iio-trig-sysfs: Document add_trigger attribute

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This patch adds the ABI documentation for the add_trigger
attribute, which is provided by the iio-trig-sysfs stand-alone driver.

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Cristina Opriceana 2015-08-12 14:28:34 +03:00 committed by Jonathan Cameron
parent 5d889abbe5
commit e0950d3b9e
1 changed files with 11 additions and 0 deletions
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11
Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs
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@ -18,3 +18,14 @@ Description:
trigger. In order to associate the trigger with an IIO device
one should write this name string to
/sys/bus/iio/devices/iio:deviceY/trigger/current_trigger.
What: /sys/bus/iio/devices/iio_sysfs_trigger/add_trigger
KernelVersion: 2.6.39
Contact: linux-iio@vger.kernel.org
Description:
This attribute is provided by the iio-trig-sysfs stand-alone
driver and it is used to activate the creation of a new trigger.
In order to achieve this, one should write a positive integer
into the associated file, which will serve as the id of the
trigger. If the trigger with the specified id is already present
in the system, an invalid argument message will be returned.