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,
41 (u8)indio_dev->active_scan_mask[0]);
43 goto st_gyro_buffer_predisable;
45 err = st_sensors_set_enable(indio_dev, true);
47 goto st_gyro_buffer_enable_all_axis;
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);
58 static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
62 err = st_sensors_set_enable(indio_dev, false);
64 goto st_gyro_buffer_predisable;
66 err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
68 st_gyro_buffer_predisable:
69 err2 = iio_triggered_buffer_predisable(indio_dev);
76 static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
77 .postenable = &st_gyro_buffer_postenable,
78 .predisable = &st_gyro_buffer_predisable,
81 int st_gyro_allocate_ring(struct iio_dev *indio_dev)
83 return iio_triggered_buffer_setup(indio_dev, NULL,
84 &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
87 void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
89 iio_triggered_buffer_cleanup(indio_dev);
92 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
93 MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
94 MODULE_LICENSE("GPL v2");