drivers/staging/iio/iio_core.h

   1 /* The industrial I/O core function defs.
   2  *
   3  * Copyright (c) 2008 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  * These definitions are meant for use only within the IIO core, not individual
  10  * drivers.
  11  */
  12
  13 #ifndef _IIO_CORE_H_
  14 #define _IIO_CORE_H_
  15
  16 int __iio_add_chan_devattr(const char *postfix,
  17                            struct iio_chan_spec const *chan,
  18                            ssize_t (*func)(struct device *dev,
  19                                            struct device_attribute *attr,
  20                                            char *buf),
  21                            ssize_t (*writefunc)(struct device *dev,
  22                                                 struct device_attribute *attr,
  23                                                 const char *buf,
  24                                                 size_t len),
  25                            int mask,
  26                            bool generic,
  27                            struct device *dev,
  28                            struct list_head *attr_list);
  29
  30 /* Event interface flags */
  31 #define IIO_BUSY_BIT_POS 1
  32
  33 #ifdef CONFIG_IIO_RING_BUFFER
  34 struct poll_table_struct;
  35
  36 void iio_chrdev_ring_open(struct iio_dev *indio_dev);
  37 void iio_chrdev_ring_release(struct iio_dev *indio_dev);
  38
  39 unsigned int iio_ring_poll(struct file *filp,
  40                            struct poll_table_struct *wait);
  41 ssize_t iio_ring_read_first_n_outer(struct file *filp, char __user *buf,
  42                                     size_t n, loff_t *f_ps);
  43
  44
  45 #define iio_ring_poll_addr (&iio_ring_poll)
  46 #define iio_ring_read_first_n_outer_addr (&iio_ring_read_first_n_outer)
  47
  48 #else
  49
  50 static inline void iio_chrdev_ring_open(struct iio_dev *indio_dev)
  51 {}
  52 static inline void iio_chrdev_ring_release(struct iio_dev *indio_dev)
  53 {}
  54
  55 #define iio_ring_poll_addr NULL
  56 #define iio_ring_read_first_n_outer_addr NULL
  57
  58 #endif
  59
  60 #endif