linux/drivers/iio/trigger/iio-trig-hrtimer.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * The industrial I/O periodic hrtimer trigger driver
 *
 * Copyright (C) Intuitive Aerial AB
 * Written by Marten Svanfeldt, [email protected]
 * Copyright (C) 2012, Analog Devices Inc.
 *	Author: Lars-Peter Clausen <[email protected]>
 * Copyright (C) 2015, Intel Corporation
 */
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/hrtimer.h>

#include <linux/iio/iio.h>
#include <linux/iio/trigger.h>
#include <linux/iio/sw_trigger.h>

/* Defined locally, not in time64.h yet. */
#define PSEC_PER_SEC …

/* default sampling frequency - 100Hz */
#define HRTIMER_DEFAULT_SAMPLING_FREQUENCY …

struct iio_hrtimer_info { … };

static const struct config_item_type iio_hrtimer_type = …;

static
ssize_t iio_hrtimer_show_sampling_frequency(struct device *dev,
					    struct device_attribute *attr,
					    char *buf)
{ … }

static
ssize_t iio_hrtimer_store_sampling_frequency(struct device *dev,
					     struct device_attribute *attr,
					     const char *buf, size_t len)
{ … }

static DEVICE_ATTR(sampling_frequency, S_IRUGO | S_IWUSR,
		   iio_hrtimer_show_sampling_frequency,
		   iio_hrtimer_store_sampling_frequency);

static struct attribute *iio_hrtimer_attrs[] = …;

static const struct attribute_group iio_hrtimer_attr_group = …;

static const struct attribute_group *iio_hrtimer_attr_groups[] = …;

static enum hrtimer_restart iio_hrtimer_trig_handler(struct hrtimer *timer)
{ … }

static int iio_trig_hrtimer_set_state(struct iio_trigger *trig, bool state)
{ … }

static const struct iio_trigger_ops iio_hrtimer_trigger_ops = …;

static struct iio_sw_trigger *iio_trig_hrtimer_probe(const char *name)
{ … }

static int iio_trig_hrtimer_remove(struct iio_sw_trigger *swt)
{ … }

static const struct iio_sw_trigger_ops iio_trig_hrtimer_ops = …;

static struct iio_sw_trigger_type iio_trig_hrtimer = …;

module_iio_sw_trigger_driver(…);

MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;