drivers/iio/iio_core_trigger.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 /* The industrial I/O core, trigger consumer handling functions
   4  *
   5  * Copyright (c) 2008 Jonathan Cameron
   6  */
   7
   8 #ifdef CONFIG_IIO_TRIGGER
   9 /**
  10  * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
  11  * @indio_dev: iio_dev associated with the device that will consume the trigger
  12  *
  13  * Return 0 if successful, negative otherwise
  14  **/
  15 int iio_device_register_trigger_consumer(struct iio_dev *indio_dev);
  16
  17 /**
  18  * iio_device_unregister_trigger_consumer() - reverse the registration process
  19  * @indio_dev: iio_dev associated with the device that consumed the trigger
  20  **/
  21 void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev);
  22
  23
  24 int iio_trigger_attach_poll_func(struct iio_trigger *trig,
  25                                  struct iio_poll_func *pf);
  26 int iio_trigger_detach_poll_func(struct iio_trigger *trig,
  27                                  struct iio_poll_func *pf);
  28
  29 #else
  30
  31 /**
  32  * iio_device_register_trigger_consumer() - set up an iio_dev to use triggers
  33  * @indio_dev: iio_dev associated with the device that will consume the trigger
  34  **/
  35 static inline int iio_device_register_trigger_consumer(struct iio_dev *indio_dev)
  36 {
  37         return 0;
  38 }
  39
  40 /**
  41  * iio_device_unregister_trigger_consumer() - reverse the registration process
  42  * @indio_dev: iio_dev associated with the device that consumed the trigger
  43  **/
  44 static inline void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
  45 {
  46 }
  47
  48 static inline int iio_trigger_attach_poll_func(struct iio_trigger *trig,
  49                                                struct iio_poll_func *pf)
  50 {
  51         return 0;
  52 }
  53 static inline int iio_trigger_detach_poll_func(struct iio_trigger *trig,
  54                                                struct iio_poll_func *pf)
  55 {
  56         return 0;
  57 }
  58
  59 #endif /* CONFIG_TRIGGER_CONSUMER */