diff options
Diffstat (limited to 'drivers/iio/industrialio-trigger.c')
| -rw-r--r-- | drivers/iio/industrialio-trigger.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 3dde81e..ba584b5 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -642,6 +642,65 @@ void devm_iio_trigger_free(struct device *dev, struct iio_trigger *iio_trig) } EXPORT_SYMBOL_GPL(devm_iio_trigger_free); +static void devm_iio_trigger_unreg(struct device *dev, void *res) +{ + iio_trigger_unregister(*(struct iio_trigger **)res); +} + +/** + * devm_iio_trigger_register - Resource-managed iio_trigger_register() + * @dev: device this trigger was allocated for + * @trig_info: trigger to register + * + * Managed iio_trigger_register(). The IIO trigger registered with this + * function is automatically unregistered on driver detach. This function + * calls iio_trigger_register() internally. Refer to that function for more + * information. + * + * If an iio_trigger registered with this function needs to be unregistered + * separately, devm_iio_trigger_unregister() must be used. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int devm_iio_trigger_register(struct device *dev, struct iio_trigger *trig_info) +{ + struct iio_trigger **ptr; + int ret; + + ptr = devres_alloc(devm_iio_trigger_unreg, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + *ptr = trig_info; + ret = iio_trigger_register(trig_info); + if (!ret) + devres_add(dev, ptr); + else + devres_free(ptr); + + return ret; +} +EXPORT_SYMBOL_GPL(devm_iio_trigger_register); + +/** + * devm_iio_trigger_unregister - Resource-managed iio_trigger_unregister() + * @dev: device this iio_trigger belongs to + * @trig_info: the trigger associated with the device + * + * Unregister trigger registered with devm_iio_trigger_register(). + */ +void devm_iio_trigger_unregister(struct device *dev, + struct iio_trigger *trig_info) +{ + int rc; + + rc = devres_release(dev, devm_iio_trigger_unreg, devm_iio_trigger_match, + trig_info); + WARN_ON(rc); +} +EXPORT_SYMBOL_GPL(devm_iio_trigger_unregister); + void iio_device_register_trigger_consumer(struct iio_dev *indio_dev) { indio_dev->groups[indio_dev->groupcounter++] = |
