1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * STMicroelectronics magnetometers 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_magn.h"
24 
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 
32 static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
33 {
34 	return st_sensors_set_enable(indio_dev, true);
35 }
36 
37 static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
38 {
39 	return st_sensors_set_enable(indio_dev, false);
40 }
41 
42 static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
43 	.postenable = &st_magn_buffer_postenable,
44 	.predisable = &st_magn_buffer_predisable,
45 };
46 
47 int st_magn_allocate_ring(struct iio_dev *indio_dev)
48 {
49 	return iio_triggered_buffer_setup(indio_dev, NULL,
50 		&st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
51 }
52 
53 void st_magn_deallocate_ring(struct iio_dev *indio_dev)
54 {
55 	iio_triggered_buffer_cleanup(indio_dev);
56 }
57 
58 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
59 MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer");
60 MODULE_LICENSE("GPL v2");
61