On 06/04/17 17:11, Fabrice Gasnier wrote:
> Add 'set_trigger' callback to iio info structure. This allows device
> to be notified when a trigger (or no trigger) has been assigned. This
> maybe useful for instance in non buffered mode (e.g. event triggered).
> This is called, after trigger and device side validate callbacks have
> been called.
>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
Seems sensible to me...
J
> ---
> Changes in v2:
> - Added set_trigger callback used in remaining patches
> ---
> drivers/iio/industrialio-trigger.c | 6 ++++++
> include/linux/iio/iio.h | 2 ++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
> index 978e1592..010bdf2 100644
> --- a/drivers/iio/industrialio-trigger.c
> +++ b/drivers/iio/industrialio-trigger.c
> @@ -434,6 +434,12 @@ static ssize_t iio_trigger_write_current(struct device *dev,
> goto out_trigger_put;
> }
>
> + if (indio_dev->info->set_trigger) {
> + ret = indio_dev->info->set_trigger(indio_dev, trig);
> + if (ret)
> + goto out_trigger_put;
> + }
> +
> indio_dev->trig = trig;
>
> if (oldtrig) {
> diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
> index 3f5ea2e..9f51065 100644
> --- a/include/linux/iio/iio.h
> +++ b/include/linux/iio/iio.h
> @@ -399,6 +399,7 @@ static inline bool iio_channel_has_available(const struct iio_chan_spec *chan,
> * @write_event_value: write a configuration value for the event.
> * @validate_trigger: function to validate the trigger when the
> * current trigger gets changed.
> + * @set_trigger: function to notify current trigger gets changed.
> * @update_scan_mode: function to configure device and scan buffer when
> * channels have changed
> * @debugfs_reg_access: function to read or write register value of device
> @@ -478,6 +479,7 @@ struct iio_info {
>
> int (*validate_trigger)(struct iio_dev *indio_dev,
> struct iio_trigger *trig);
> + int (*set_trigger)(struct iio_dev *indio_dev, struct iio_trigger *trig);
> int (*update_scan_mode)(struct iio_dev *indio_dev,
> const unsigned long *scan_mask);
> int (*debugfs_reg_access)(struct iio_dev *indio_dev,
>
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