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| author |   Matt Ranostay <mranostay@gmail.com> | 2016-09-02 23:36:15 -0700 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2016-09-03 15:31:55 +0100 |
| commit | c8cdf70890d89c07c9e890b103106d58999f0ce4 (patch) | |
| tree | c96f5fa74ac061a3151b1099119a584c55a18a85 /include/linux | |
| parent | iio: sx9500: add final devicetree support (diff) | |
| download | linux-dev-c8cdf70890d89c07c9e890b103106d58999f0ce4.tar.xz linux-dev-c8cdf70890d89c07c9e890b103106d58999f0ce4.zip | |
iio: trigger: allow immutable triggers to be assigned
There are times when an assigned trigger to a device shouldn't ever
change after intialization.
Examples of this being used is when an provider device has a trigger
that is assigned to an ADC, which uses it populate data into a callback
buffer.
Signed-off-by: Matt Ranostay <matt@ranostay.consulting>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iio/iio.h | 2 | ||||
| -rw-r--r-- | include/linux/iio/trigger.h | 9 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 854e2dad1e0d..786952cd509f 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -483,6 +483,7 @@ struct iio_buffer_setup_ops { * @scan_timestamp: [INTERN] set if any buffers have requested timestamp * @scan_index_timestamp:[INTERN] cache of the index to the timestamp * @trig: [INTERN] current device trigger (buffer modes) + * @trig_readonly [INTERN] mark the current trigger immutable * @pollfunc: [DRIVER] function run on trigger being received * @pollfunc_event: [DRIVER] function run on events trigger being received * @channels: [DRIVER] channel specification structure table @@ -523,6 +524,7 @@ struct iio_dev { bool scan_timestamp; unsigned scan_index_timestamp; struct iio_trigger *trig; + bool trig_readonly; struct iio_poll_func *pollfunc; struct iio_poll_func *pollfunc_event; diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h index 1c9e028e0d4a..a122bdd4076c 100644 --- a/include/linux/iio/trigger.h +++ b/include/linux/iio/trigger.h @@ -132,6 +132,15 @@ int iio_trigger_register(struct iio_trigger *trig_info); void iio_trigger_unregister(struct iio_trigger *trig_info); /** + * iio_trigger_set_immutable() - set an immutable trigger on destination + * + * @indio_dev - IIO device structure containing the device + * @trig - trigger to assign to device + * + **/ +int iio_trigger_set_immutable(struct iio_dev *indio_dev, struct iio_trigger *trig); + +/** * iio_trigger_poll() - called on a trigger occurring * @trig: trigger which occurred * |