include/linux/iio/trigger_consumer.h

   1 /* The industrial I/O core, trigger consumer functions
   2  *
   3  * Copyright (c) 2008-2011 Jonathan Cameron
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  */
   9
  10 #ifndef __LINUX_IIO_TRIGGER_CONSUMER_H__
  11 #define __LINUX_IIO_TRIGGER_CONSUMER_H__
  12
  13 #include <linux/interrupt.h>
  14 #include <linux/types.h>
  15
  16 struct iio_dev;
  17 struct iio_trigger;
  18
  19 /**
  20  * struct iio_poll_func - poll function pair
  21  *
  22  * @indio_dev:                  data specific to device (passed into poll func)
  23  * @h:                          the function that is actually run on trigger
  24  * @thread:                     threaded interrupt part
  25  * @type:                       the type of interrupt (basically if oneshot)
  26  * @name:                       name used to identify the trigger consumer.
  27  * @irq:                        the corresponding irq as allocated from the
  28  *                              trigger pool
  29  * @timestamp:                  some devices need a timestamp grabbed as soon
  30  *                              as possible after the trigger - hence handler
  31  *                              passes it via here.
  32  **/
  33 struct iio_poll_func {
  34         struct iio_dev *indio_dev;
  35         irqreturn_t (*h)(int irq, void *p);
  36         irqreturn_t (*thread)(int irq, void *p);
  37         int type;
  38         char *name;
  39         int irq;
  40         s64 timestamp;
  41 };
  42
  43
  44 struct iio_poll_func
  45 *iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
  46                     irqreturn_t (*thread)(int irq, void *p),
  47                     int type,
  48                     struct iio_dev *indio_dev,
  49                     const char *fmt,
  50                     ...);
  51 void iio_dealloc_pollfunc(struct iio_poll_func *pf);
  52 irqreturn_t iio_pollfunc_store_time(int irq, void *p);
  53
  54 void iio_trigger_notify_done(struct iio_trigger *trig);
  55
  56 /*
  57  * Two functions for common case where all that happens is a pollfunc
  58  * is attached and detached from a trigger
  59  */
  60 int iio_triggered_buffer_postenable(struct iio_dev *indio_dev);
  61 int iio_triggered_buffer_predisable(struct iio_dev *indio_dev);
  62
  63 #endif