st_lsm9ds0_i2c.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/i2c.h>
14#include <linux/module.h>
15#include <linux/mod_devicetable.h>
16#include <linux/regmap.h>
17
18#include <linux/iio/common/st_sensors_i2c.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 i2c_device_id st_lsm9ds0_id_table[] = {
36	{ LSM303D_IMU_DEV_NAME },
37	{ LSM9DS0_IMU_DEV_NAME },
38	{ }
39};
40MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
41
42static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
43	{"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
44	{ }
45};
46MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);
47
48static const struct regmap_config st_lsm9ds0_regmap_config = {
49	.reg_bits	= 8,
50	.val_bits	= 8,
51	.read_flag_mask	= 0x80,
52};
53
54static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
55{
56	const struct regmap_config *config = &st_lsm9ds0_regmap_config;
57	struct device *dev = &client->dev;
58	struct st_lsm9ds0 *lsm9ds0;
59	struct regmap *regmap;
60
61	st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));
62
63	lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
64	if (!lsm9ds0)
65		return -ENOMEM;
66
67	lsm9ds0->dev = dev;
68	lsm9ds0->name = client->name;
69	lsm9ds0->irq = client->irq;
70
71	regmap = devm_regmap_init_i2c(client, config);
72	if (IS_ERR(regmap))
73		return PTR_ERR(regmap);
74
75	i2c_set_clientdata(client, lsm9ds0);
76
77	return st_lsm9ds0_probe(lsm9ds0, regmap);
78}
79
80static struct i2c_driver st_lsm9ds0_driver = {
81	.driver = {
82		.name = "st-lsm9ds0-i2c",
83		.of_match_table = st_lsm9ds0_of_match,
84		.acpi_match_table = st_lsm9ds0_acpi_match,
85	},
86	.probe = st_lsm9ds0_i2c_probe,
87	.id_table = st_lsm9ds0_id_table,
88};
89module_i2c_driver(st_lsm9ds0_driver);
90
91MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
92MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU I2C driver");
93MODULE_LICENSE("GPL v2");
94MODULE_IMPORT_NS("IIO_ST_SENSORS");