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/kernel.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/spi/spi.h>
14 #include <linux/iio/iio.h>
15
16 #include <linux/iio/common/st_sensors.h>
17 #include <linux/iio/common/st_sensors_spi.h>
18 #include "st_magn.h"
19
20 /*
21 * For new single-chip sensors use <device_name> as compatible string.
22 * For old single-chip devices keep <device_name>-magn to maintain
23 * compatibility
24 * For multi-chip devices, use <device_name>-magn to distinguish which
25 * capability is being used
26 */
27 static const struct of_device_id st_magn_of_match[] = {
28 {
29 .compatible = "st,lis3mdl-magn",
30 .data = LIS3MDL_MAGN_DEV_NAME,
31 },
32 {
33 .compatible = "st,lsm303agr-magn",
34 .data = LSM303AGR_MAGN_DEV_NAME,
35 },
36 {
37 .compatible = "st,lis2mdl",
38 .data = LIS2MDL_MAGN_DEV_NAME,
39 },
40 {
41 .compatible = "st,lsm9ds1-magn",
42 .data = LSM9DS1_MAGN_DEV_NAME,
43 },
44 {}
45 };
46 MODULE_DEVICE_TABLE(of, st_magn_of_match);
47
st_magn_spi_probe(struct spi_device * spi)48 static int st_magn_spi_probe(struct spi_device *spi)
49 {
50 const struct st_sensor_settings *settings;
51 struct st_sensor_data *mdata;
52 struct iio_dev *indio_dev;
53 int err;
54
55 st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
56
57 settings = st_magn_get_settings(spi->modalias);
58 if (!settings) {
59 dev_err(&spi->dev, "device name %s not recognized.\n",
60 spi->modalias);
61 return -ENODEV;
62 }
63
64 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
65 if (!indio_dev)
66 return -ENOMEM;
67
68 mdata = iio_priv(indio_dev);
69 mdata->sensor_settings = (struct st_sensor_settings *)settings;
70
71 err = st_sensors_spi_configure(indio_dev, spi);
72 if (err < 0)
73 return err;
74
75 err = st_sensors_power_enable(indio_dev);
76 if (err)
77 return err;
78
79 err = st_magn_common_probe(indio_dev);
80 if (err < 0)
81 goto st_magn_power_off;
82
83 return 0;
84
85 st_magn_power_off:
86 st_sensors_power_disable(indio_dev);
87
88 return err;
89 }
90
st_magn_spi_remove(struct spi_device * spi)91 static int st_magn_spi_remove(struct spi_device *spi)
92 {
93 struct iio_dev *indio_dev = spi_get_drvdata(spi);
94
95 st_magn_common_remove(indio_dev);
96
97 st_sensors_power_disable(indio_dev);
98
99 return 0;
100 }
101
102 static const struct spi_device_id st_magn_id_table[] = {
103 { LIS3MDL_MAGN_DEV_NAME },
104 { LSM303AGR_MAGN_DEV_NAME },
105 { LIS2MDL_MAGN_DEV_NAME },
106 { LSM9DS1_MAGN_DEV_NAME },
107 {},
108 };
109 MODULE_DEVICE_TABLE(spi, st_magn_id_table);
110
111 static struct spi_driver st_magn_driver = {
112 .driver = {
113 .name = "st-magn-spi",
114 .of_match_table = st_magn_of_match,
115 },
116 .probe = st_magn_spi_probe,
117 .remove = st_magn_spi_remove,
118 .id_table = st_magn_id_table,
119 };
120 module_spi_driver(st_magn_driver);
121
122 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
123 MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
124 MODULE_LICENSE("GPL v2");
125