linux/drivers/iio/buffer/industrialio-triggered-buffer.c

// SPDX-License-Identifier: GPL-2.0-only
 /*
 * Copyright (c) 2012 Analog Devices, Inc.
 *  Author: Lars-Peter Clausen <[email protected]>
 */

#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/buffer_impl.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/trigger_consumer.h>

/**
 * iio_triggered_buffer_setup_ext() - Setup triggered buffer and pollfunc
 * @indio_dev:		IIO device structure
 * @h:			Function which will be used as pollfunc top half
 * @thread:		Function which will be used as pollfunc bottom half
 * @direction:		Direction of the data stream (in/out).
 * @setup_ops:		Buffer setup functions to use for this device.
 *			If NULL the default setup functions for triggered
 *			buffers will be used.
 * @buffer_attrs:	Extra sysfs buffer attributes for this IIO buffer
 *
 * This function combines some common tasks which will normally be performed
 * when setting up a triggered buffer. It will allocate the buffer and the
 * pollfunc.
 *
 * Before calling this function the indio_dev structure should already be
 * completely initialized, but not yet registered. In practice this means that
 * this function should be called right before iio_device_register().
 *
 * To free the resources allocated by this function call
 * iio_triggered_buffer_cleanup().
 */
int iio_triggered_buffer_setup_ext(struct iio_dev *indio_dev,
	irqreturn_t (*h)(int irq, void *p),
	irqreturn_t (*thread)(int irq, void *p),
	enum iio_buffer_direction direction,
	const struct iio_buffer_setup_ops *setup_ops,
	const struct iio_dev_attr **buffer_attrs)
{ … }
EXPORT_SYMBOL(…);

/**
 * iio_triggered_buffer_cleanup() - Free resources allocated by iio_triggered_buffer_setup_ext()
 * @indio_dev: IIO device structure
 */
void iio_triggered_buffer_cleanup(struct iio_dev *indio_dev)
{ … }
EXPORT_SYMBOL(…);

static void devm_iio_triggered_buffer_clean(void *indio_dev)
{ … }

int devm_iio_triggered_buffer_setup_ext(struct device *dev,
					struct iio_dev *indio_dev,
					irqreturn_t (*h)(int irq, void *p),
					irqreturn_t (*thread)(int irq, void *p),
					enum iio_buffer_direction direction,
					const struct iio_buffer_setup_ops *ops,
					const struct iio_dev_attr **buffer_attrs)
{ … }
EXPORT_SYMBOL_GPL(…);

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