Messages in this thread | | | Date | Fri, 07 Aug 2015 19:10:32 +0300 | From | Vladimir Barinov <> | Subject | Re: [PATCH v3 5/7] iio: Support triggered events |
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Hi Lars,
On 07.08.2015 16:45, Lars-Peter Clausen wrote: > Hi, > > On 07/29/2015 02:57 PM, Vladimir Barinov wrote: >> Support triggered events. >> >> This is useful for chips that don't have their own interrupt sources. >> It allows to use generic/standalone iio triggers for those drivers. >> > Thanks for the patch. Can you describe in more detail how > INDIO_EVENT_TRIGGERED differs from the INDIO_BUFFER_TRIGGERED. By just > looking at the source code I don't understand quite why it is necessary. This is needed for the case when iio buffer is not used and used only iio event.
The difference to INDIO_BUFFER_TRIGGERED is that for triggered buffer the trigger poll function is attached (using iio_trigger_attach_poll_func) only in industrialio-buffer.c using number of steps/conditions starting by issuing 1 to buffer/enable sysfs path.
For chips that do not use iio buffer but use only iio events the iio_trigger_attach_poll_func never called.
In case of using INDIO_BUFFER_TRIGGERED the poll func is attached/detached via industrialio-buffer.c In case of using INDIO_EVENT_TRIGGERED the poll func is attached/detached via industrialio-trigger.c during set/change the current trigger.
Regards, Vladimir
> > Thanks, > - Lars >
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