lkml.org 
[lkml]   [2015]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3 5/7] iio: Support triggered events
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
>



\
 
 \ /
  Last update: 2015-08-07 18:21    [W:0.087 / U:0.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site