iio: Improve the kernel-doc of iio_trigger_poll

Move the kernel-doc of the function to industrialio-trigger.c
Add a note on the context where the function is expected to be called.

Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/bd84fc17e9d22eab998bf48720297f9a77689f45.1677761379.git.mehdi.djait.k@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/industrialio-trigger.c

@@ -192,6 +192,12 @@ static void iio_trigger_notify_done_atomic(struct iio_trigger *trig)
 		schedule_work(&trig->reenable_work);
 }
 
+/**
+ * iio_trigger_poll() - Call the IRQ trigger handler of the consumers
+ * @trig: trigger which occurred
+ *
+ * This function should only be called from a hard IRQ context.
+ */
 void iio_trigger_poll(struct iio_trigger *trig)
 {
 	int i;

include/linux/iio/trigger.h

@@ -151,12 +151,6 @@ void iio_trigger_unregister(struct iio_trigger *trig_info);
  **/
 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
- *
- * Typically called in relevant hardware interrupt handler.
- **/
 void iio_trigger_poll(struct iio_trigger *trig);
 void iio_trigger_poll_chained(struct iio_trigger *trig);