drivers/iio/industrialio-trigger.c

52 	struct iio_trigger *trig = to_iio_trigger(dev);
54 	return sysfs_emit(buf, "%s\n", trig->name);
115 int iio_trigger_set_immutable(struct iio_dev *indio_dev, struct iio_trigger *trig)
119 	if (!indio_dev || !trig)
126 	indio_dev->trig = iio_trigger_get(trig);
148 	struct iio_trigger *trig = NULL, *iter;
153 			trig = iter;
154 			iio_trigger_get(trig);
159 	return trig;
164 	struct iio_trigger *trig = container_of(work, struct iio_trigger,
171 	trig->ops->reenable(trig);
188 static void iio_trigger_notify_done_atomic(struct iio_trigger *trig)
190 	if (atomic_dec_and_test(&trig->use_count) && trig->ops &&
191 	    trig->ops->reenable)
192 		schedule_work(&trig->reenable_work);
197  * @trig: trigger which occurred
201 void iio_trigger_poll(struct iio_trigger *trig)
205 	if (!atomic_read(&trig->use_count)) {
206 		atomic_set(&trig->use_count, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
209 			if (trig->subirqs[i].enabled)
210 				generic_handle_irq(trig->subirq_base + i);
212 				iio_trigger_notify_done_atomic(trig);
228  * @trig: trigger which occurred
232 void iio_trigger_poll_nested(struct iio_trigger *trig)
236 	if (!atomic_read(&trig->use_count)) {
237 		atomic_set(&trig->use_count, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
240 			if (trig->subirqs[i].enabled)
241 				handle_nested_irq(trig->subirq_base + i);
243 				iio_trigger_notify_done(trig);
249 void iio_trigger_notify_done(struct iio_trigger *trig)
251 	if (atomic_dec_and_test(&trig->use_count) && trig->ops &&
252 	    trig->ops->reenable)
253 		trig->ops->reenable(trig);
258 static int iio_trigger_get_irq(struct iio_trigger *trig)
262 	mutex_lock(&trig->pool_lock);
263 	ret = bitmap_find_free_region(trig->pool,
266 	mutex_unlock(&trig->pool_lock);
268 		ret += trig->subirq_base;
273 static void iio_trigger_put_irq(struct iio_trigger *trig, int irq)
275 	mutex_lock(&trig->pool_lock);
276 	clear_bit(irq - trig->subirq_base, trig->pool);
277 	mutex_unlock(&trig->pool_lock);
287 int iio_trigger_attach_poll_func(struct iio_trigger *trig,
292 		bitmap_empty(trig->pool, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
299 	pf->irq = iio_trigger_get_irq(trig);
302 			trig->name, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
314 	if (trig->ops && trig->ops->set_trigger_state && notinuse) {
315 		ret = trig->ops->set_trigger_state(trig, true);
325 	if (iio_validate_own_trigger(pf->indio_dev, trig))
326 		trig->attached_own_device = true;
333 	iio_trigger_put_irq(trig, pf->irq);
339 int iio_trigger_detach_poll_func(struct iio_trigger *trig,
344 		bitmap_weight(trig->pool, CONFIG_IIO_CONSUMERS_PER_TRIGGER) == 1;
347 	if (trig->ops && trig->ops->set_trigger_state && no_other_users) {
348 		ret = trig->ops->set_trigger_state(trig, false);
352 	if (pf->indio_dev->dev.parent == trig->dev.parent)
353 		trig->attached_own_device = false;
354 	iio_trigger_put_irq(trig, pf->irq);
425 	if (indio_dev->trig)
426 		return sysfs_emit(buf, "%s\n", indio_dev->trig->name);
450 	struct iio_trigger *oldtrig = indio_dev->trig;
451 	struct iio_trigger *trig;
465 	trig = iio_trigger_acquire_by_name(buf);
466 	if (oldtrig == trig) {
471 	if (trig && indio_dev->info->validate_trigger) {
472 		ret = indio_dev->info->validate_trigger(indio_dev, trig);
477 	if (trig && trig->ops && trig->ops->validate_device) {
478 		ret = trig->ops->validate_device(trig, indio_dev);
483 	indio_dev->trig = trig;
491 	if (indio_dev->trig) {
493 			iio_trigger_attach_poll_func(indio_dev->trig,
500 	if (trig)
501 		iio_trigger_put(trig);
519 	struct iio_trigger *trig = to_iio_trigger(device);
522 	if (trig->subirq_base) {
524 			irq_modify_status(trig->subirq_base + i,
527 			irq_set_chip(trig->subirq_base + i,
529 			irq_set_handler(trig->subirq_base + i,
533 		irq_free_descs(trig->subirq_base,
536 	kfree(trig->name);
537 	kfree(trig);
548 	struct iio_trigger *trig = container_of(chip, struct iio_trigger, subirq_chip);
550 	trig->subirqs[d->irq - trig->subirq_base].enabled = false;
556 	struct iio_trigger *trig = container_of(chip, struct iio_trigger, subirq_chip);
558 	trig->subirqs[d->irq - trig->subirq_base].enabled = true;
567 	struct iio_trigger *trig;
570 	trig = kzalloc(sizeof(*trig), GFP_KERNEL);
571 	if (!trig)
574 	trig->dev.parent = parent;
575 	trig->dev.type = &iio_trig_type;
576 	trig->dev.bus = &iio_bus_type;
577 	device_initialize(&trig->dev);
578 	INIT_WORK(&trig->reenable_work, iio_reenable_work_fn);
580 	mutex_init(&trig->pool_lock);
581 	trig->subirq_base = irq_alloc_descs(-1, 0,
584 	if (trig->subirq_base < 0)
587 	trig->name = kvasprintf(GFP_KERNEL, fmt, vargs);
588 	if (trig->name == NULL)
591 	INIT_LIST_HEAD(&trig->list);
593 	trig->owner = this_mod;
595 	trig->subirq_chip.name = trig->name;
596 	trig->subirq_chip.irq_mask = &iio_trig_subirqmask;
597 	trig->subirq_chip.irq_unmask = &iio_trig_subirqunmask;
599 		irq_set_chip(trig->subirq_base + i, &trig->subirq_chip);
600 		irq_set_handler(trig->subirq_base + i, &handle_simple_irq);
601 		irq_modify_status(trig->subirq_base + i,
605 	return trig;
608 	irq_free_descs(trig->subirq_base, CONFIG_IIO_CONSUMERS_PER_TRIGGER);
610 	kfree(trig);
629 	struct iio_trigger *trig;
633 	trig = viio_trigger_alloc(parent, this_mod, fmt, vargs);
636 	return trig;
640 void iio_trigger_free(struct iio_trigger *trig)
642 	if (trig)
643 		put_device(&trig->dev);
671 	struct iio_trigger **ptr, *trig;
681 	trig = viio_trigger_alloc(parent, this_mod, fmt, vargs);
683 	if (trig) {
684 		*ptr = trig;
690 	return trig;
727 	return indio_dev->trig->attached_own_device;
735  * @trig: the IIO trigger to check
743 int iio_validate_own_trigger(struct iio_dev *idev, struct iio_trigger *trig)
745 	if (idev->dev.parent != trig->dev.parent)
754  * @trig: The IIO trigger to check
763 int iio_trigger_validate_own_device(struct iio_trigger *trig,
766 	if (indio_dev->dev.parent != trig->dev.parent)
781 	if (indio_dev->trig)
782 		iio_trigger_put(indio_dev->trig);