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 <[email protected]>
---
 Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs 
b/Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs
index 5235e6c..887aa92 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs
+++ b/Documentation/ABI/testing/sysfs-bus-iio-trigger-sysfs
@@ -9,3 +9,14 @@ Description:
                automated testing or in situations, where other trigger methods
                are not applicable. For example no RTC or spare GPIOs.
                X is the IIO index of the trigger.
+
+What:          /sys/bus/iio/devices/iio_sysfs_trigger/add_trigger
+KernelVersion: 2.6.39
+Contact:       [email protected]
+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.
-- 
1.9.1

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