LXR linux/include/linux/iio/trigger

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/* The industrial I/O core, trigger consumer functions
   3 *
   4 * Copyright (c) 2008-2011 Jonathan Cameron
   5 */
   6
   7#ifndef __LINUX_IIO_TRIGGER_CONSUMER_H__
   8#define __LINUX_IIO_TRIGGER_CONSUMER_H__
   9
  10#include <linux/interrupt.h>
  11#include <linux/types.h>
  12
  13struct iio_dev;
  14struct iio_trigger;
  15
  16/**
  17 * struct iio_poll_func - poll function pair
  18 *
  19 * @indio_dev:                  data specific to device (passed into poll func)
  20 * @h:                          the function that is actually run on trigger
  21 * @thread:                     threaded interrupt part
  22 * @type:                       the type of interrupt (basically if oneshot)
  23 * @name:                       name used to identify the trigger consumer.
  24 * @irq:                        the corresponding irq as allocated from the
  25 *                              trigger pool
  26 * @timestamp:                  some devices need a timestamp grabbed as soon
  27 *                              as possible after the trigger - hence handler
  28 *                              passes it via here.
  29 **/
  30struct iio_poll_func {
  31        struct iio_dev *indio_dev;
  32        irqreturn_t (*h)(int irq, void *p);
  33        irqreturn_t (*thread)(int irq, void *p);
  34        int type;
  35        char *name;
  36        int irq;
  37        s64 timestamp;
  38};
  39
  40
  41struct iio_poll_func
  42*iio_alloc_pollfunc(irqreturn_t (*h)(int irq, void *p),
  43                    irqreturn_t (*thread)(int irq, void *p),
  44                    int type,
  45                    struct iio_dev *indio_dev,
  46                    const char *fmt,
  47                    ...);
  48void iio_dealloc_pollfunc(struct iio_poll_func *pf);
  49irqreturn_t iio_pollfunc_store_time(int irq, void *p);
  50
  51void iio_trigger_notify_done(struct iio_trigger *trig);
  52
  53/*
  54 * Two functions for common case where all that happens is a pollfunc
  55 * is attached and detached from a trigger
  56 */
  57int iio_triggered_buffer_postenable(struct iio_dev *indio_dev);
  58int iio_triggered_buffer_predisable(struct iio_dev *indio_dev);
  59
  60#endif
  61