st_lsm9ds0_spi.c

 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/device/devres.h>
11#include <linux/err.h>
12#include <linux/gfp_types.h>
13#include <linux/module.h>
14#include <linux/mod_devicetable.h>
15#include <linux/regmap.h>
16#include <linux/spi/spi.h>
17
18#include <linux/iio/common/st_sensors_spi.h>
19
20#include "st_lsm9ds0.h"
21
22static const struct of_device_id st_lsm9ds0_of_match[] = {
23	{
24		.compatible = "st,lsm303d-imu",
25		.data = LSM303D_IMU_DEV_NAME,
26	},
27	{
28		.compatible = "st,lsm9ds0-imu",
29		.data = LSM9DS0_IMU_DEV_NAME,
30	},
31	{ }
32};
33MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
34
35static const struct spi_device_id st_lsm9ds0_id_table[] = {
36	{ LSM303D_IMU_DEV_NAME },
37	{ LSM9DS0_IMU_DEV_NAME },
38	{ }
39};
40MODULE_DEVICE_TABLE(spi, st_lsm9ds0_id_table);
41
42static const struct regmap_config st_lsm9ds0_regmap_config = {
43	.reg_bits	= 8,
44	.val_bits	= 8,
45	.read_flag_mask	= 0xc0,
46};
47
48static int st_lsm9ds0_spi_probe(struct spi_device *spi)
49{
50	struct device *dev = &spi->dev;
51	struct st_lsm9ds0 *lsm9ds0;
52	struct regmap *regmap;
53
54	st_sensors_dev_name_probe(dev, spi->modalias, sizeof(spi->modalias));
55
56	lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
57	if (!lsm9ds0)
58		return -ENOMEM;
59
60	lsm9ds0->dev = dev;
61	lsm9ds0->name = spi->modalias;
62	lsm9ds0->irq = spi->irq;
63
64	regmap = devm_regmap_init_spi(spi, &st_lsm9ds0_regmap_config);
65	if (IS_ERR(regmap))
66		return PTR_ERR(regmap);
67
68	spi_set_drvdata(spi, lsm9ds0);
69
70	return st_lsm9ds0_probe(lsm9ds0, regmap);
71}
72
73static struct spi_driver st_lsm9ds0_driver = {
74	.driver = {
75		.name = "st-lsm9ds0-spi",
76		.of_match_table = st_lsm9ds0_of_match,
77	},
78	.probe = st_lsm9ds0_spi_probe,
79	.id_table = st_lsm9ds0_id_table,
80};
81module_spi_driver(st_lsm9ds0_driver);
82
83MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
84MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU SPI driver");
85MODULE_LICENSE("GPL v2");
86MODULE_IMPORT_NS("IIO_ST_SENSORS");