1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * STMicroelectronics accelerometers driver
 4 *
 5 * Copyright 2012-2013 STMicroelectronics Inc.
 6 *
 7 * Denis Ciocca <denis.ciocca@st.com>
 8 */
 9
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/stat.h>
14#include <linux/interrupt.h>
15#include <linux/i2c.h>
16#include <linux/delay.h>
17#include <linux/iio/iio.h>
18#include <linux/iio/buffer.h>
19#include <linux/iio/trigger_consumer.h>
20#include <linux/iio/triggered_buffer.h>
21
22#include <linux/iio/common/st_sensors.h>
23#include "st_accel.h"
24
25int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
26{
27	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
28
29	return st_sensors_set_dataready_irq(indio_dev, state);
30}
31
32static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
33{
34	int err;
35
36	err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
37	if (err < 0)
38		return err;
39
40	err = st_sensors_set_enable(indio_dev, true);
41	if (err < 0)
42		goto st_accel_buffer_enable_all_axis;
43
44	return 0;
45
46st_accel_buffer_enable_all_axis:
47	st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
48	return err;
49}
50
51static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
52{
53	int err;
54
55	err = st_sensors_set_enable(indio_dev, false);
56	if (err < 0)
57		return err;
58
59	return st_sensors_set_axis_enable(indio_dev,
60					  ST_SENSORS_ENABLE_ALL_AXIS);
61}
62
63static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
64	.postenable = &st_accel_buffer_postenable,
65	.predisable = &st_accel_buffer_predisable,
66};
67
68int st_accel_allocate_ring(struct iio_dev *indio_dev)
69{
70	return iio_triggered_buffer_setup(indio_dev, NULL,
71		&st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
72}
73
74void st_accel_deallocate_ring(struct iio_dev *indio_dev)
75{
76	iio_triggered_buffer_cleanup(indio_dev);
77}
78
79MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
80MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer");
81MODULE_LICENSE("GPL v2");

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * STMicroelectronics accelerometers driver
 4 *
 5 * Copyright 2012-2013 STMicroelectronics Inc.
 6 *
 7 * Denis Ciocca <denis.ciocca@st.com>
 8 */
 9
 
10#include <linux/kernel.h>
 
 
 
 
 
11#include <linux/iio/iio.h>
12#include <linux/iio/buffer.h>
13#include <linux/iio/trigger.h>
14#include <linux/iio/triggered_buffer.h>
15
16#include <linux/iio/common/st_sensors.h>
17#include "st_accel.h"
18
19int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
20{
21	struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
22
23	return st_sensors_set_dataready_irq(indio_dev, state);
24}
25
26static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
27{
28	int err;
29
30	err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
31	if (err < 0)
32		return err;
33
34	err = st_sensors_set_enable(indio_dev, true);
35	if (err < 0)
36		goto st_accel_buffer_enable_all_axis;
37
38	return 0;
39
40st_accel_buffer_enable_all_axis:
41	st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
42	return err;
43}
44
45static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
46{
47	int err;
48
49	err = st_sensors_set_enable(indio_dev, false);
50	if (err < 0)
51		return err;
52
53	return st_sensors_set_axis_enable(indio_dev,
54					  ST_SENSORS_ENABLE_ALL_AXIS);
55}
56
57static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
58	.postenable = &st_accel_buffer_postenable,
59	.predisable = &st_accel_buffer_predisable,
60};
61
62int st_accel_allocate_ring(struct iio_dev *indio_dev)
63{
64	return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
65		NULL, &st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
66}