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/i2c.h>
14 #include <linux/iio/iio.h>
15 
16 #include <linux/iio/common/st_sensors.h>
17 #include <linux/iio/common/st_sensors_i2c.h>
18 #include "st_magn.h"
19 
20 #ifdef CONFIG_OF
21 static const struct of_device_id st_magn_of_match[] = {
22 	{
23 		.compatible = "st,lsm303dlh-magn",
24 		.data = LSM303DLH_MAGN_DEV_NAME,
25 	},
26 	{
27 		.compatible = "st,lsm303dlhc-magn",
28 		.data = LSM303DLHC_MAGN_DEV_NAME,
29 	},
30 	{
31 		.compatible = "st,lsm303dlm-magn",
32 		.data = LSM303DLM_MAGN_DEV_NAME,
33 	},
34 	{
35 		.compatible = "st,lis3mdl-magn",
36 		.data = LIS3MDL_MAGN_DEV_NAME,
37 	},
38 	{
39 		.compatible = "st,lsm303agr-magn",
40 		.data = LSM303AGR_MAGN_DEV_NAME,
41 	},
42 	{
43 		.compatible = "st,lis2mdl",
44 		.data = LIS2MDL_MAGN_DEV_NAME,
45 	},
46 	{
47 		.compatible = "st,lsm9ds1-magn",
48 		.data = LSM9DS1_MAGN_DEV_NAME,
49 	},
50 	{},
51 };
52 MODULE_DEVICE_TABLE(of, st_magn_of_match);
53 #else
54 #define st_magn_of_match NULL
55 #endif
56 
57 static int st_magn_i2c_probe(struct i2c_client *client,
58 			     const struct i2c_device_id *id)
59 {
60 	const struct st_sensor_settings *settings;
61 	struct st_sensor_data *mdata;
62 	struct iio_dev *indio_dev;
63 	int err;
64 
65 	st_sensors_of_name_probe(&client->dev, st_magn_of_match,
66 				 client->name, sizeof(client->name));
67 
68 	settings = st_magn_get_settings(client->name);
69 	if (!settings) {
70 		dev_err(&client->dev, "device name %s not recognized.\n",
71 			client->name);
72 		return -ENODEV;
73 	}
74 
75 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
76 	if (!indio_dev)
77 		return -ENOMEM;
78 
79 	mdata = iio_priv(indio_dev);
80 	mdata->sensor_settings = (struct st_sensor_settings *)settings;
81 
82 	err = st_sensors_i2c_configure(indio_dev, client);
83 	if (err < 0)
84 		return err;
85 
86 	err = st_magn_common_probe(indio_dev);
87 	if (err < 0)
88 		return err;
89 
90 	return 0;
91 }
92 
93 static int st_magn_i2c_remove(struct i2c_client *client)
94 {
95 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
96 	st_magn_common_remove(indio_dev);
97 
98 	return 0;
99 }
100 
101 static const struct i2c_device_id st_magn_id_table[] = {
102 	{ LSM303DLH_MAGN_DEV_NAME },
103 	{ LSM303DLHC_MAGN_DEV_NAME },
104 	{ LSM303DLM_MAGN_DEV_NAME },
105 	{ LIS3MDL_MAGN_DEV_NAME },
106 	{ LSM303AGR_MAGN_DEV_NAME },
107 	{ LIS2MDL_MAGN_DEV_NAME },
108 	{ LSM9DS1_MAGN_DEV_NAME },
109 	{},
110 };
111 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
112 
113 static struct i2c_driver st_magn_driver = {
114 	.driver = {
115 		.name = "st-magn-i2c",
116 		.of_match_table = of_match_ptr(st_magn_of_match),
117 	},
118 	.probe = st_magn_i2c_probe,
119 	.remove = st_magn_i2c_remove,
120 	.id_table = st_magn_id_table,
121 };
122 module_i2c_driver(st_magn_driver);
123 
124 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
125 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
126 MODULE_LICENSE("GPL v2");
127