projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fda8d26e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 7be56a8f DC |
2 | /* |
| 3 | * STMicroelectronics gyroscopes driver | |
| 4 | * | |
| 5 | * Copyright 2012-2013 STMicroelectronics Inc. | |
| 6 | * | |
| 7 | * Denis Ciocca <denis.ciocca@st.com> | |
| 7be56a8f DC |
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 | ||
| 25 | int st_gyro_trig_set_state(struct iio_trigger *trig, bool state) | |
| 26 | { | |
| 1e9663c6 | 27 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); |
| 7be56a8f DC |
28 | |
| 29 | return st_sensors_set_dataready_irq(indio_dev, state); | |
| 30 | } | |
| 31 | ||
| 7be56a8f DC |
32 | static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) |
| 33 | { | |
| 21b1ee31 | 34 | int err; |
| 7be56a8f | 35 | |
| 21b1ee31 DC |
36 | err = iio_triggered_buffer_postenable(indio_dev); |
| 37 | if (err < 0) | |
| e031d5f5 | 38 | return err; |
| 7be56a8f DC |
39 | |
| 40 | err = st_sensors_set_axis_enable(indio_dev, | |
| 21b1ee31 | 41 | (u8)indio_dev->active_scan_mask[0]); |
| 7be56a8f | 42 | if (err < 0) |
| 21b1ee31 | 43 | goto st_gyro_buffer_predisable; |
| 7be56a8f | 44 | |
| 21b1ee31 | 45 | err = st_sensors_set_enable(indio_dev, true); |
| 7be56a8f | 46 | if (err < 0) |
| 21b1ee31 | 47 | goto st_gyro_buffer_enable_all_axis; |
| 7be56a8f | 48 | |
| 21b1ee31 | 49 | return 0; |
| 7be56a8f | 50 | |
| 21b1ee31 DC |
51 | st_gyro_buffer_enable_all_axis: |
| 52 | st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); | |
| 53 | st_gyro_buffer_predisable: | |
| 54 | iio_triggered_buffer_predisable(indio_dev); | |
| 7be56a8f DC |
55 | return err; |
| 56 | } | |
| 57 | ||
| 58 | static int st_gyro_buffer_predisable(struct iio_dev *indio_dev) | |
| 59 | { | |
| 21b1ee31 | 60 | int err, err2; |
| 7be56a8f | 61 | |
| 21b1ee31 | 62 | err = st_sensors_set_enable(indio_dev, false); |
| 7be56a8f | 63 | if (err < 0) |
| 21b1ee31 | 64 | goto st_gyro_buffer_predisable; |
| 7be56a8f DC |
65 | |
| 66 | err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); | |
| 7be56a8f | 67 | |
| 21b1ee31 DC |
68 | st_gyro_buffer_predisable: |
| 69 | err2 = iio_triggered_buffer_predisable(indio_dev); | |
| 70 | if (!err) | |
| 71 | err = err2; | |
| 7be56a8f | 72 | |
| 7be56a8f DC |
73 | return err; |
| 74 | } | |
| 75 | ||
| 76 | static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = { | |
| 7be56a8f DC |
77 | .postenable = &st_gyro_buffer_postenable, |
| 78 | .predisable = &st_gyro_buffer_predisable, | |
| 79 | }; | |
| 80 | ||
| 81 | int st_gyro_allocate_ring(struct iio_dev *indio_dev) | |
| 82 | { | |
| 65925b65 | 83 | return iio_triggered_buffer_setup(indio_dev, NULL, |
| 7be56a8f DC |
84 | &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops); |
| 85 | } | |
| 86 | ||
| 87 | void st_gyro_deallocate_ring(struct iio_dev *indio_dev) | |
| 88 | { | |
| 89 | iio_triggered_buffer_cleanup(indio_dev); | |
| 90 | } | |
| 91 | ||
| 92 | MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); | |
| 93 | MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer"); | |
| 94 | MODULE_LICENSE("GPL v2"); |