1IIO trigger drivers. 2 3Many triggers are provided by hardware that will also be registered as 4an IIO device. Whilst this can create device specific complexities 5such triggers are registered with the core in the same way as 6stand-alone triggers. 7 8struct iio_trig *trig = iio_trigger_alloc("<trigger format string>", ...); 9 10allocates a trigger structure. The key elements to then fill in within 11a driver are: 12 13trig->owner 14 Typically set to THIS_MODULE. Used to ensure correct 15 ownership of core allocated resources. 16 17trig->set_trigger_state: 18 Function that enables / disables the underlying source of the trigger. 19 20There is also a 21trig->alloc_list which is useful for drivers that allocate multiple 22triggers to keep track of what they have created. 23 24When these have been set call: 25 26iio_trigger_register(trig); 27 28to register the trigger with the core, making it available to trigger 29consumers. 30 31Trigger Consumers 32 33Currently triggers are only used for the filling of software 34buffers and as such any device supporting INDIO_RING_TRIGGERED has the 35consumer interface automatically created. 36