drivers/staging/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 /**
  11  * struct iio_poll_func - poll function pair
  12  *
  13  * @indio_dev:                  data specific to device (passed into poll func)
  14  * @h:                          the function that is actually run on trigger
  15  * @thread:                     threaded interrupt part
  16  * @type:                       the type of interrupt (basically if oneshot)
  17  * @name:                       name used to identify the trigger consumer.
  18  * @irq:                        the corresponding irq as allocated from the
  19  *                              trigger pool
  20  * @timestamp:                  some devices need a timestamp grabbed as soon
  21  *                              as possible after the trigger - hence handler
  22  *                              passes it via here.
  23  **/
  24 struct iio_poll_func {
  25         struct iio_dev *indio_dev;
  26         irqreturn_t (*h)(int irq, void *p);
  27         irqreturn_t (*thread)(int irq, void *p);
  28         int type;
  29         char *name;
  30         int irq;
  31         s64 timestamp;
  32 };
  33
  34
  35 struct iio_poll_func
  36 *iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
  37                     irqreturn_t (*thread)(int irq, void *p),
  38                     int type,
  39                     struct iio_dev *indio_dev,
  40                     const char *fmt,
  41                     ...);
  42 void iio_dealloc_pollfunc(struct iio_poll_func *pf);
  43 irqreturn_t iio_pollfunc_store_time(int irq, void *p);
  44
  45 void iio_trigger_notify_done(struct iio_trigger *trig);
  46
  47 /*
  48  * Two functions for common case where all that happens is a pollfunc
  49  * is attached and detached from a trigger
  50  */
  51 int iio_triggered_buffer_postenable(struct iio_dev *indio_dev);
  52 int iio_triggered_buffer_predisable(struct iio_dev *indio_dev);