include/linux/iio/sw_trigger.h

   1 /*
   2  * Industrial I/O software trigger interface
   3  *
   4  * Copyright (c) 2015 Intel Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  */
  10
  11 #ifndef __IIO_SW_TRIGGER
  12 #define __IIO_SW_TRIGGER
  13
  14 #include <linux/module.h>
  15 #include <linux/device.h>
  16 #include <linux/iio/iio.h>
  17 #include <linux/configfs.h>
  18
  19 #define module_iio_sw_trigger_driver(__iio_sw_trigger_type) \
  20         module_driver(__iio_sw_trigger_type, iio_register_sw_trigger_type, \
  21                       iio_unregister_sw_trigger_type)
  22
  23 struct iio_sw_trigger_ops;
  24
  25 struct iio_sw_trigger_type {
  26         const char *name;
  27         struct module *owner;
  28         const struct iio_sw_trigger_ops *ops;
  29         struct list_head list;
  30         struct config_group *group;
  31 };
  32
  33 struct iio_sw_trigger {
  34         struct iio_trigger *trigger;
  35         struct iio_sw_trigger_type *trigger_type;
  36         struct config_group group;
  37 };
  38
  39 struct iio_sw_trigger_ops {
  40         struct iio_sw_trigger* (*probe)(const char *);
  41         int (*remove)(struct iio_sw_trigger *);
  42 };
  43
  44 static inline
  45 struct iio_sw_trigger *to_iio_sw_trigger(struct config_item *item)
  46 {
  47         return container_of(to_config_group(item), struct iio_sw_trigger,
  48                             group);
  49 }
  50
  51 int iio_register_sw_trigger_type(struct iio_sw_trigger_type *tt);
  52 void iio_unregister_sw_trigger_type(struct iio_sw_trigger_type *tt);
  53
  54 struct iio_sw_trigger *iio_sw_trigger_create(const char *, const char *);
  55 void iio_sw_trigger_destroy(struct iio_sw_trigger *);
  56
  57 int iio_sw_trigger_type_configfs_register(struct iio_sw_trigger_type *tt);
  58 void iio_sw_trigger_type_configfs_unregister(struct iio_sw_trigger_type *tt);
  59
  60 static inline
  61 void iio_swt_group_init_type_name(struct iio_sw_trigger *t,
  62                                   const char *name,
  63                                   const struct config_item_type *type)
  64 {
  65 #if IS_ENABLED(CONFIG_CONFIGFS_FS)
  66         config_group_init_type_name(&t->group, name, type);
  67 #endif
  68 }
  69
  70 #endif /* __IIO_SW_TRIGGER */