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}
67