1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * STMicroelectronics LSM9DS0 IMU driver
4  *
5  * Copyright (C) 2021, Intel Corporation
6  *
7  * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
8  */
9 
10 #include <linux/i2c.h>
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/mod_devicetable.h>
14 #include <linux/regmap.h>
15 
16 #include <linux/iio/common/st_sensors_i2c.h>
17 
18 #include "st_lsm9ds0.h"
19 
20 static const struct of_device_id st_lsm9ds0_of_match[] = {
21 	{
22 		.compatible = "st,lsm9ds0-imu",
23 		.data = LSM9DS0_IMU_DEV_NAME,
24 	},
25 	{}
26 };
27 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
28 
29 static const struct i2c_device_id st_lsm9ds0_id_table[] = {
30 	{ LSM9DS0_IMU_DEV_NAME },
31 	{}
32 };
33 MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
34 
35 static const struct regmap_config st_lsm9ds0_regmap_config = {
36 	.reg_bits	= 8,
37 	.val_bits	= 8,
38 	.read_flag_mask	= 0x80,
39 };
40 
41 static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
42 {
43 	const struct regmap_config *config = &st_lsm9ds0_regmap_config;
44 	struct device *dev = &client->dev;
45 	struct st_lsm9ds0 *lsm9ds0;
46 	struct regmap *regmap;
47 
48 	st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));
49 
50 	lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
51 	if (!lsm9ds0)
52 		return -ENOMEM;
53 
54 	lsm9ds0->dev = dev;
55 	lsm9ds0->name = client->name;
56 	lsm9ds0->irq = client->irq;
57 
58 	regmap = devm_regmap_init_i2c(client, config);
59 	if (IS_ERR(regmap))
60 		return PTR_ERR(regmap);
61 
62 	i2c_set_clientdata(client, lsm9ds0);
63 
64 	return st_lsm9ds0_probe(lsm9ds0, regmap);
65 }
66 
67 static struct i2c_driver st_lsm9ds0_driver = {
68 	.driver = {
69 		.name = "st-lsm9ds0-i2c",
70 		.of_match_table = st_lsm9ds0_of_match,
71 	},
72 	.probe_new = st_lsm9ds0_i2c_probe,
73 	.id_table = st_lsm9ds0_id_table,
74 };
75 module_i2c_driver(st_lsm9ds0_driver);
76 
77 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
78 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU I2C driver");
79 MODULE_LICENSE("GPL v2");
80