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/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_gyro.h" |
18 | |
19 | int st_gyro_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 | |
26 | static int st_gyro_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_gyro_buffer_enable_all_axis; |
37 | |
38 | return 0; |
39 | |
40 | st_gyro_buffer_enable_all_axis: |
41 | st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); |
42 | return err; |
43 | } |
44 | |
45 | static int st_gyro_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, ST_SENSORS_ENABLE_ALL_AXIS); |
54 | } |
55 | |
56 | static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = { |
57 | .postenable = &st_gyro_buffer_postenable, |
58 | .predisable = &st_gyro_buffer_predisable, |
59 | }; |
60 | |
61 | int st_gyro_allocate_ring(struct iio_dev *indio_dev) |
62 | { |
63 | return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev, |
64 | NULL, &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops); |
65 | } |
66 | |
67 | |