diff options
| author | Matti Vaittinen <mazziesaccount@gmail.com> | 2023-05-08 13:31:17 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-05-23 21:20:17 +0100 |
| commit | 517985ebc53119a2c2590d29d4056e3f17ef8375 (patch) | |
| tree | d2a212405bf00c28f0fff3aaf5e770f310d9710d /drivers/iio/industrialio-trigger.c | |
| parent | 4bef3adbd4ba40ec3b81c0adf288fb44a2d0aaf2 (diff) | |
iio: trigger: Add simple trigger_validation helper
Some triggers can only be attached to the IIO device that corresponds to
the same physical device. Implement generic helper which can be used as
a validate_trigger callback for such devices.
Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/51cd3e3e74a6addf8d333f4a109fb9c5a11086ee.1683541225.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/industrialio-trigger.c')
| -rw-r--r-- | drivers/iio/industrialio-trigger.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 784dc1e00310..f207e36b12cc 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -322,7 +322,7 @@ int iio_trigger_attach_poll_func(struct iio_trigger *trig, * 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) + if (iio_validate_own_trigger(pf->indio_dev, trig)) trig->attached_own_device = true; return ret; @@ -729,6 +729,26 @@ bool iio_trigger_using_own(struct iio_dev *indio_dev) EXPORT_SYMBOL(iio_trigger_using_own); /** + * iio_validate_own_trigger - Check if a trigger and IIO device belong to + * the same device + * @idev: the IIO device to check + * @trig: the IIO trigger to check + * + * This function can be used as the validate_trigger callback for triggers that + * can only be attached to their own device. + * + * Return: 0 if both the trigger and the IIO device belong to the same + * device, -EINVAL otherwise. + */ +int iio_validate_own_trigger(struct iio_dev *idev, struct iio_trigger *trig) +{ + if (idev->dev.parent != trig->dev.parent) + return -EINVAL; + return 0; +} +EXPORT_SYMBOL_GPL(iio_validate_own_trigger); + +/** * iio_trigger_validate_own_device - Check if a trigger and IIO device belong to * the same device * @trig: The IIO trigger to check |