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/iio/iio.h>
13 #include <linux/iio/buffer.h>
14 #include <linux/iio/trigger.h>
15 #include <linux/iio/triggered_buffer.h>
16
17 #include <linux/iio/common/st_sensors.h>
18 #include "st_accel.h"
19
st_accel_trig_set_state(struct iio_trigger * trig,bool state)20 int st_accel_trig_set_state(struct iio_trigger *trig, bool state)
21 {
22 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
23
24 return st_sensors_set_dataready_irq(indio_dev, state);
25 }
26
st_accel_buffer_postenable(struct iio_dev * indio_dev)27 static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
28 {
29 int err;
30
31 err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
32 if (err < 0)
33 return err;
34
35 err = st_sensors_set_enable(indio_dev, true);
36 if (err < 0)
37 goto st_accel_buffer_enable_all_axis;
38
39 return 0;
40
41 st_accel_buffer_enable_all_axis:
42 st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
43 return err;
44 }
45
st_accel_buffer_predisable(struct iio_dev * indio_dev)46 static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
47 {
48 int err;
49
50 err = st_sensors_set_enable(indio_dev, false);
51 if (err < 0)
52 return err;
53
54 return st_sensors_set_axis_enable(indio_dev,
55 ST_SENSORS_ENABLE_ALL_AXIS);
56 }
57
58 static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {
59 .postenable = &st_accel_buffer_postenable,
60 .predisable = &st_accel_buffer_predisable,
61 };
62
st_accel_allocate_ring(struct iio_dev * indio_dev)63 int st_accel_allocate_ring(struct iio_dev *indio_dev)
64 {
65 return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
66 NULL, &st_sensors_trigger_handler, &st_accel_buffer_setup_ops);
67 }
68
69 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
70 MODULE_DESCRIPTION("STMicroelectronics accelerometers buffer");
71 MODULE_LICENSE("GPL v2");
72