[mirror_ubuntu-zesty-kernel.git] / drivers / iio / iio_core.h

/* The industrial I/O core function defs.
 *
 * Copyright (c) 2008 Jonathan Cameron
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * These definitions are meant for use only within the IIO core, not individual
 * drivers.
 */

#ifndef _IIO_CORE_H_
#define _IIO_CORE_H_
#include <linux/kernel.h>
#include <linux/device.h>

struct iio_chan_spec;
struct iio_dev;


int __iio_add_chan_devattr(const char *postfix,
			   struct iio_chan_spec const *chan,
			   ssize_t (*func)(struct device *dev,
					   struct device_attribute *attr,
					   char *buf),
			   ssize_t (*writefunc)(struct device *dev,
						struct device_attribute *attr,
						const char *buf,
						size_t len),
			   u64 mask,
			   bool generic,
			   struct device *dev,
			   struct list_head *attr_list);

/* Event interface flags */
#define IIO_BUSY_BIT_POS 1

#ifdef CONFIG_IIO_BUFFER
struct poll_table_struct;

unsigned int iio_buffer_poll(struct file *filp,
			     struct poll_table_struct *wait);
ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
				      size_t n, loff_t *f_ps);


#define iio_buffer_poll_addr (&iio_buffer_poll)
#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)

#else

#define iio_buffer_poll_addr NULL
#define iio_buffer_read_first_n_outer_addr NULL

#endif

int iio_device_register_eventset(struct iio_dev *indio_dev);
void iio_device_unregister_eventset(struct iio_dev *indio_dev);
int iio_event_getfd(struct iio_dev *indio_dev);

#endif
Commit	Line	Data
df9c1c42 JC	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	*
cecfb931	9	* These definitions are meant for use only within the IIO core, not individual
df9c1c42 JC	10	* drivers.
	11	*/
	12
1aa04278 JC	13	#ifndef _IIO_CORE_H_
1aa04278 JC	14	#define _IIO_CORE_H_
ef97d421 JC	15	#include <linux/kernel.h>
	16	#include <linux/device.h>
	17
	18	struct iio_chan_spec;
	19	struct iio_dev;
	20
1aa04278	21
df9c1c42	22	int __iio_add_chan_devattr(const char *postfix,
df9c1c42 JC	23	struct iio_chan_spec const *chan,
	24	ssize_t (func)(struct device dev,
	25	struct device_attribute *attr,
	26	char *buf),
	27	ssize_t (writefunc)(struct device dev,
	28	struct device_attribute *attr,
	29	const char *buf,
	30	size_t len),
e614a54b	31	u64 mask,
df9c1c42 JC	32	bool generic,
	33	struct device *dev,
	34	struct list_head *attr_list);
	35
	36	/* Event interface flags */
	37	#define IIO_BUSY_BIT_POS 1
1aa04278	38
f2a96245	39	#ifdef CONFIG_IIO_BUFFER
1aa04278 JC	40	struct poll_table_struct;
1aa04278 JC	41
14555b14 JC	42	unsigned int iio_buffer_poll(struct file *filp,
	43	struct poll_table_struct *wait);
	44	ssize_t iio_buffer_read_first_n_outer(struct file filp, char __user buf,
	45	size_t n, loff_t *f_ps);
1aa04278 JC	46
1aa04278 JC	47
14555b14 JC	48	#define iio_buffer_poll_addr (&iio_buffer_poll)
14555b14 JC	49	#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
1aa04278 JC	50
	51	#else
	52
14555b14 JC	53	#define iio_buffer_poll_addr NULL
14555b14 JC	54	#define iio_buffer_read_first_n_outer_addr NULL
1aa04278 JC	55
	56	#endif
	57
0a769a95 LPC	58	int iio_device_register_eventset(struct iio_dev *indio_dev);
	59	void iio_device_unregister_eventset(struct iio_dev *indio_dev);
	60	int iio_event_getfd(struct iio_dev *indio_dev);
	61
1aa04278	62	#endif