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/kernel.h>
11 #include <linux/module.h>
12 #include <linux/mod_devicetable.h>
13 #include <linux/regmap.h>
14 #include <linux/spi/spi.h>
15 
16 #include <linux/iio/common/st_sensors_spi.h>
17 
18 #include "st_lsm9ds0.h"
19 
20 static const struct of_device_id st_lsm9ds0_of_match[] = {
21 	{
22 		.compatible = "st,lsm303d-imu",
23 		.data = LSM303D_IMU_DEV_NAME,
24 	},
25 	{
26 		.compatible = "st,lsm9ds0-imu",
27 		.data = LSM9DS0_IMU_DEV_NAME,
28 	},
29 	{}
30 };
31 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
32 
33 static const struct spi_device_id st_lsm9ds0_id_table[] = {
34 	{ LSM303D_IMU_DEV_NAME },
35 	{ LSM9DS0_IMU_DEV_NAME },
36 	{}
37 };
38 MODULE_DEVICE_TABLE(spi, st_lsm9ds0_id_table);
39 
40 static const struct regmap_config st_lsm9ds0_regmap_config = {
41 	.reg_bits	= 8,
42 	.val_bits	= 8,
43 	.read_flag_mask	= 0xc0,
44 };
45 
46 static int st_lsm9ds0_spi_probe(struct spi_device *spi)
47 {
48 	struct device *dev = &spi->dev;
49 	struct st_lsm9ds0 *lsm9ds0;
50 	struct regmap *regmap;
51 
52 	st_sensors_dev_name_probe(dev, spi->modalias, sizeof(spi->modalias));
53 
54 	lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
55 	if (!lsm9ds0)
56 		return -ENOMEM;
57 
58 	lsm9ds0->dev = dev;
59 	lsm9ds0->name = spi->modalias;
60 	lsm9ds0->irq = spi->irq;
61 
62 	regmap = devm_regmap_init_spi(spi, &st_lsm9ds0_regmap_config);
63 	if (IS_ERR(regmap))
64 		return PTR_ERR(regmap);
65 
66 	spi_set_drvdata(spi, lsm9ds0);
67 
68 	return st_lsm9ds0_probe(lsm9ds0, regmap);
69 }
70 
71 static struct spi_driver st_lsm9ds0_driver = {
72 	.driver = {
73 		.name = "st-lsm9ds0-spi",
74 		.of_match_table = st_lsm9ds0_of_match,
75 	},
76 	.probe = st_lsm9ds0_spi_probe,
77 	.id_table = st_lsm9ds0_id_table,
78 };
79 module_spi_driver(st_lsm9ds0_driver);
80 
81 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
82 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU SPI driver");
83 MODULE_LICENSE("GPL v2");
84 MODULE_IMPORT_NS(IIO_ST_SENSORS);
85