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, enable: 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, axis_enable: indio_dev->active_scan_mask[0]);
31 if (err < 0)
32 return err;
33
34 err = st_sensors_set_enable(indio_dev, enable: 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, enable: 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

source code of linux/drivers/iio/accel/st_accel_buffer.c