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bc2b7dab62
Adds a new per-device sysfs attribute "current_timestamp_clock" to allow userspace to select a particular POSIX clock for buffered samples and events timestamping. Following clocks, as listed in clock_gettime(2), are supported: CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_MONOTONIC_RAW, CLOCK_REALTIME_COARSE, CLOCK_MONOTONIC_COARSE, CLOCK_BOOTTIME and CLOCK_TAI. Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com> Acked-by: Sanchayan Maity <maitysanchayan@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/* The industrial I/O core function defs.
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*
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* Copyright (c) 2008 Jonathan Cameron
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* These definitions are meant for use only within the IIO core, not individual
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* drivers.
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*/
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#ifndef _IIO_CORE_H_
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#define _IIO_CORE_H_
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#include <linux/kernel.h>
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#include <linux/device.h>
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struct iio_chan_spec;
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struct iio_dev;
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extern struct device_type iio_device_type;
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int __iio_add_chan_devattr(const char *postfix,
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struct iio_chan_spec const *chan,
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ssize_t (*func)(struct device *dev,
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struct device_attribute *attr,
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char *buf),
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ssize_t (*writefunc)(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len),
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u64 mask,
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enum iio_shared_by shared_by,
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struct device *dev,
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struct list_head *attr_list);
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void iio_free_chan_devattr_list(struct list_head *attr_list);
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ssize_t iio_format_value(char *buf, unsigned int type, int size, int *vals);
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/* Event interface flags */
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#define IIO_BUSY_BIT_POS 1
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#ifdef CONFIG_IIO_BUFFER
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struct poll_table_struct;
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unsigned int iio_buffer_poll(struct file *filp,
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struct poll_table_struct *wait);
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ssize_t iio_buffer_read_first_n_outer(struct file *filp, char __user *buf,
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size_t n, loff_t *f_ps);
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int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
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void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev);
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#define iio_buffer_poll_addr (&iio_buffer_poll)
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#define iio_buffer_read_first_n_outer_addr (&iio_buffer_read_first_n_outer)
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void iio_disable_all_buffers(struct iio_dev *indio_dev);
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void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
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#else
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#define iio_buffer_poll_addr NULL
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#define iio_buffer_read_first_n_outer_addr NULL
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static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
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static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
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static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
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#endif
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int iio_device_register_eventset(struct iio_dev *indio_dev);
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void iio_device_unregister_eventset(struct iio_dev *indio_dev);
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void iio_device_wakeup_eventset(struct iio_dev *indio_dev);
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int iio_event_getfd(struct iio_dev *indio_dev);
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struct iio_event_interface;
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bool iio_event_enabled(const struct iio_event_interface *ev_int);
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#endif
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