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-rw-r--r--drivers/iio/industrialio-trigger.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index ba584b5..e1e1048 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -271,6 +271,14 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
goto out_free_irq;
}
+ /*
+ * Check if we just registered to our own trigger: we determine that
+ * this is the case if the IIO device and the trigger device share the
+ * same parent device.
+ */
+ if (pf->indio_dev->dev.parent == trig->dev.parent)
+ trig->attached_own_device = true;
+
return ret;
out_free_irq:
@@ -295,6 +303,8 @@ static int iio_trigger_detach_poll_func(struct iio_trigger *trig,
if (ret)
return ret;
}
+ if (pf->indio_dev->dev.parent == trig->dev.parent)
+ trig->attached_own_device = false;
iio_trigger_put_irq(trig, pf->irq);
free_irq(pf->irq, pf);
module_put(pf->indio_dev->info->driver_module);
@@ -701,6 +711,12 @@ void devm_iio_trigger_unregister(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_iio_trigger_unregister);
+bool iio_trigger_using_own(struct iio_dev *indio_dev)
+{
+ return indio_dev->trig->attached_own_device;
+}
+EXPORT_SYMBOL(iio_trigger_using_own);
+
void iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
{
indio_dev->groups[indio_dev->groupcounter++] =
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