1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * STMicroelectronics gyroscopes 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_gyro.h"
24
st_gyro_trig_set_state(struct iio_trigger * trig,bool state)25 int st_gyro_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
st_gyro_buffer_postenable(struct iio_dev * indio_dev)32 static int st_gyro_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_gyro_buffer_enable_all_axis;
43
44 return 0;
45
46 st_gyro_buffer_enable_all_axis:
47 st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
48 return err;
49 }
50
st_gyro_buffer_predisable(struct iio_dev * indio_dev)51 static int st_gyro_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, ST_SENSORS_ENABLE_ALL_AXIS);
60 }
61
62 static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
63 .postenable = &st_gyro_buffer_postenable,
64 .predisable = &st_gyro_buffer_predisable,
65 };
66
st_gyro_allocate_ring(struct iio_dev * indio_dev)67 int st_gyro_allocate_ring(struct iio_dev *indio_dev)
68 {
69 return iio_triggered_buffer_setup(indio_dev, NULL,
70 &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
71 }
72
st_gyro_deallocate_ring(struct iio_dev * indio_dev)73 void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
74 {
75 iio_triggered_buffer_cleanup(indio_dev);
76 }
77
78 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
79 MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
80 MODULE_LICENSE("GPL v2");
81
