projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| fda8d26e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 872e79ad DC |
2 | /* |
| 3 | * STMicroelectronics magnetometers driver | |
| 4 | * | |
| 5 | * Copyright 2012-2013 STMicroelectronics Inc. | |
| 6 | * | |
| 7 | * Denis Ciocca <denis.ciocca@st.com> | |
| 872e79ad 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_magn.h" | |
| 24 | ||
| 74f5683f GB |
25 | int st_magn_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 | ||
| 872e79ad DC |
32 | static int st_magn_buffer_postenable(struct iio_dev *indio_dev) |
| 33 | { | |
| 6ee19af4 | 34 | int err; |
| 872e79ad | 35 | |
| 872e79ad DC |
36 | err = iio_triggered_buffer_postenable(indio_dev); |
| 37 | if (err < 0) | |
| e031d5f5 | 38 | return err; |
| 6ee19af4 DC |
39 | |
| 40 | err = st_sensors_set_enable(indio_dev, true); | |
| 41 | if (err < 0) | |
| 42 | goto st_magn_buffer_predisable; | |
| 872e79ad | 43 | |
| 6ee19af4 | 44 | return 0; |
| 872e79ad | 45 | |
| 6ee19af4 DC |
46 | st_magn_buffer_predisable: |
| 47 | iio_triggered_buffer_predisable(indio_dev); | |
| 872e79ad DC |
48 | return err; |
| 49 | } | |
| 50 | ||
| 51 | static int st_magn_buffer_predisable(struct iio_dev *indio_dev) | |
| 52 | { | |
| 6ee19af4 | 53 | int err, err2; |
| 872e79ad | 54 | |
| fe5192ac | 55 | err = st_sensors_set_enable(indio_dev, false); |
| 872e79ad | 56 | |
| 6ee19af4 DC |
57 | err2 = iio_triggered_buffer_predisable(indio_dev); |
| 58 | if (!err) | |
| 59 | err = err2; | |
| 872e79ad | 60 | |
| 872e79ad DC |
61 | return err; |
| 62 | } | |
| 63 | ||
| 64 | static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = { | |
| 872e79ad DC |
65 | .postenable = &st_magn_buffer_postenable, |
| 66 | .predisable = &st_magn_buffer_predisable, | |
| 67 | }; | |
| 68 | ||
| 69 | int st_magn_allocate_ring(struct iio_dev *indio_dev) | |
| 70 | { | |
| 65925b65 | 71 | return iio_triggered_buffer_setup(indio_dev, NULL, |
| 872e79ad DC |
72 | &st_sensors_trigger_handler, &st_magn_buffer_setup_ops); |
| 73 | } | |
| 74 | ||
| 75 | void st_magn_deallocate_ring(struct iio_dev *indio_dev) | |
| 76 | { | |
| 77 | iio_triggered_buffer_cleanup(indio_dev); | |
| 78 | } | |
| 79 | ||
| 80 | MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); | |
| 81 | MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer"); | |
| 82 | MODULE_LICENSE("GPL v2"); |