Linux Device Drivers Development

IIO trigger and sysfs (user space)

There are two locations in sysfs related to triggers:

• /sys/bus/iio/devices/triggerY/, which is created once an IIO trigger is registered with the IIO core and corresponds to triggers with index Y. There is at least one attribute in the directory:
  • name, which is the trigger name that can be later used for association with a device
• The /sys/bus/iio/devices/iio:deviceX/trigger/* directory will be automatically created if your device supports a triggered buffer. You can associate a trigger with our device by writing the trigger's name in the current_trigger file.