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Groups > linux.kernel > #1202870
| From | Vladimir Barinov <vladimir.barinov@cogentembedded.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v3 5/7] iio: Support triggered events |
| Date | 2015-08-07 18:20 +0200 |
| Message-ID | <pUSxd-4FO-35@gated-at.bofh.it> (permalink) |
| References | <pRz7H-7h-3@gated-at.bofh.it> <pRz7I-7h-25@gated-at.bofh.it> <pUQc2-152-21@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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Re: [PATCH v3 5/7] iio: Support triggered events Lars-Peter Clausen <lars@metafoo.de> - 2015-08-07 15:50 +0200
Re: [PATCH v3 5/7] iio: Support triggered events Vladimir Barinov <vladimir.barinov@cogentembedded.com> - 2015-08-07 18:20 +0200
Re: [PATCH v3 5/7] iio: Support triggered events Jonathan Cameron <jic23@kernel.org> - 2015-08-16 11:10 +0200
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