1 // SPDX-License-Identifier: GPL-2.0-only
3 * STMicroelectronics gyroscopes driver
5 * Copyright 2012-2013 STMicroelectronics Inc.
7 * Denis Ciocca <denis.ciocca@st.com>
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>
22 #include <linux/iio/common/st_sensors.h>
25 int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)
27 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
29 return st_sensors_set_dataready_irq(indio_dev, state);
32 static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
36 err = iio_triggered_buffer_postenable(indio_dev);
40 err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
42 goto st_gyro_buffer_predisable;
44 err = st_sensors_set_enable(indio_dev, true);
46 goto st_gyro_buffer_enable_all_axis;
50 st_gyro_buffer_enable_all_axis:
51 st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
52 st_gyro_buffer_predisable:
53 iio_triggered_buffer_predisable(indio_dev);
57 static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
61 err = st_sensors_set_enable(indio_dev, false);
63 goto st_gyro_buffer_predisable;
65 err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
67 st_gyro_buffer_predisable:
68 err2 = iio_triggered_buffer_predisable(indio_dev);
75 static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
76 .postenable = &st_gyro_buffer_postenable,
77 .predisable = &st_gyro_buffer_predisable,
80 int st_gyro_allocate_ring(struct iio_dev *indio_dev)
82 return iio_triggered_buffer_setup(indio_dev, NULL,
83 &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
86 void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
88 iio_triggered_buffer_cleanup(indio_dev);
91 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
92 MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
93 MODULE_LICENSE("GPL v2");