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 static const struct of_device_id st_magn_of_match[] = {
21 	{
22 		.compatible = "st,lsm303dlh-magn",
23 		.data = LSM303DLH_MAGN_DEV_NAME,
24 	},
25 	{
26 		.compatible = "st,lsm303dlhc-magn",
27 		.data = LSM303DLHC_MAGN_DEV_NAME,
28 	},
29 	{
30 		.compatible = "st,lsm303dlm-magn",
31 		.data = LSM303DLM_MAGN_DEV_NAME,
32 	},
33 	{
34 		.compatible = "st,lis3mdl-magn",
35 		.data = LIS3MDL_MAGN_DEV_NAME,
36 	},
37 	{
38 		.compatible = "st,lsm303agr-magn",
39 		.data = LSM303AGR_MAGN_DEV_NAME,
40 	},
41 	{
42 		.compatible = "st,lis2mdl",
43 		.data = LIS2MDL_MAGN_DEV_NAME,
44 	},
45 	{
46 		.compatible = "st,lsm9ds1-magn",
47 		.data = LSM9DS1_MAGN_DEV_NAME,
48 	},
49 	{
50 		.compatible = "st,iis2mdc",
51 		.data = IIS2MDC_MAGN_DEV_NAME,
52 	},
53 	{},
54 };
55 MODULE_DEVICE_TABLE(of, st_magn_of_match);
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_dev_name_probe(&client->dev, client->name, sizeof(client->name));
66 
67 	settings = st_magn_get_settings(client->name);
68 	if (!settings) {
69 		dev_err(&client->dev, "device name %s not recognized.\n",
70 			client->name);
71 		return -ENODEV;
72 	}
73 
74 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
75 	if (!indio_dev)
76 		return -ENOMEM;
77 
78 	mdata = iio_priv(indio_dev);
79 	mdata->sensor_settings = (struct st_sensor_settings *)settings;
80 
81 	err = st_sensors_i2c_configure(indio_dev, client);
82 	if (err < 0)
83 		return err;
84 
85 	err = st_sensors_power_enable(indio_dev);
86 	if (err)
87 		return err;
88 
89 	err = st_magn_common_probe(indio_dev);
90 	if (err < 0)
91 		goto st_magn_power_off;
92 
93 	return 0;
94 
95 st_magn_power_off:
96 	st_sensors_power_disable(indio_dev);
97 
98 	return err;
99 }
100 
101 static int st_magn_i2c_remove(struct i2c_client *client)
102 {
103 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
104 
105 	st_sensors_power_disable(indio_dev);
106 
107 	st_magn_common_remove(indio_dev);
108 
109 	return 0;
110 }
111 
112 static const struct i2c_device_id st_magn_id_table[] = {
113 	{ LSM303DLH_MAGN_DEV_NAME },
114 	{ LSM303DLHC_MAGN_DEV_NAME },
115 	{ LSM303DLM_MAGN_DEV_NAME },
116 	{ LIS3MDL_MAGN_DEV_NAME },
117 	{ LSM303AGR_MAGN_DEV_NAME },
118 	{ LIS2MDL_MAGN_DEV_NAME },
119 	{ LSM9DS1_MAGN_DEV_NAME },
120 	{ IIS2MDC_MAGN_DEV_NAME },
121 	{},
122 };
123 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
124 
125 static struct i2c_driver st_magn_driver = {
126 	.driver = {
127 		.name = "st-magn-i2c",
128 		.of_match_table = st_magn_of_match,
129 	},
130 	.probe = st_magn_i2c_probe,
131 	.remove = st_magn_i2c_remove,
132 	.id_table = st_magn_id_table,
133 };
134 module_i2c_driver(st_magn_driver);
135 
136 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
137 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
138 MODULE_LICENSE("GPL v2");
139