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