2017-02-06 15:26 GMT+01:00 Lars-Peter Clausen lars@metafoo.de:
On 02/06/2017 03:21 PM, Benjamin Gaignard wrote:
Thoses patches add parent_trigger attribute to IIO triggers. The goal is to allow triggers to use triggers like is this done for iio devices. With this patch it will be possible to chain triggers, for example stm32 triggers could be used as clock of an other triggers: echo "tim1_trgo" > trigger0/parent_trigger.
Can you explain how this is different to assigning the parent_trigger directly to the device?
It is the same but done on trigger structure without need to have an iio device.
While writing stm32 trigger driver Jonathan explain me that I can't use an iio device without channel to chain my hardware blocks. Since my hardware allows to chain triggers, Jonathan suggest to create this parent_trigger attribute to ab able to link the triggers.