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/mod_devicetable.h>
13#include <linux/spi/spi.h>
14#include <linux/iio/iio.h>
15
16#include <linux/iio/common/st_sensors.h>
17#include <linux/iio/common/st_sensors_spi.h>
18#include "st_magn.h"
19
20/*
21 * For new single-chip sensors use <device_name> as compatible string.
22 * For old single-chip devices keep <device_name>-magn to maintain
23 * compatibility
24 * For multi-chip devices, use <device_name>-magn to distinguish which
25 * capability is being used
26 */
27static const struct of_device_id st_magn_of_match[] = {
28	{
29		.compatible = "st,lis3mdl-magn",
30		.data = LIS3MDL_MAGN_DEV_NAME,
31	},
32	{
33		.compatible = "st,lsm303agr-magn",
34		.data = LSM303AGR_MAGN_DEV_NAME,
35	},
36	{
37		.compatible = "st,lis2mdl",
38		.data = LIS2MDL_MAGN_DEV_NAME,
39	},
40	{
41		.compatible = "st,lsm9ds1-magn",
42		.data = LSM9DS1_MAGN_DEV_NAME,
43	},
44	{
45		.compatible = "st,iis2mdc",
46		.data = IIS2MDC_MAGN_DEV_NAME,
47	},
48	{
49		.compatible = "st,lsm303c-magn",
50		.data = LSM303C_MAGN_DEV_NAME,
51	},
52	{}
53};
54MODULE_DEVICE_TABLE(of, st_magn_of_match);
55
56static int st_magn_spi_probe(struct spi_device *spi)
57{
58	const struct st_sensor_settings *settings;
59	struct st_sensor_data *mdata;
60	struct iio_dev *indio_dev;
61	int err;
62
63	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
64
65	settings = st_magn_get_settings(spi->modalias);
66	if (!settings) {
67		dev_err(&spi->dev, "device name %s not recognized.\n",
68			spi->modalias);
69		return -ENODEV;
70	}
71
72	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
73	if (!indio_dev)
74		return -ENOMEM;
75
76	mdata = iio_priv(indio_dev);
77	mdata->sensor_settings = (struct st_sensor_settings *)settings;
78
79	err = st_sensors_spi_configure(indio_dev, spi);
80	if (err < 0)
81		return err;
82
83	err = st_sensors_power_enable(indio_dev);
84	if (err)
85		return err;
86
87	return st_magn_common_probe(indio_dev);
88}
89
90static const struct spi_device_id st_magn_id_table[] = {
91	{ LIS3MDL_MAGN_DEV_NAME },
92	{ LSM303AGR_MAGN_DEV_NAME },
93	{ LIS2MDL_MAGN_DEV_NAME },
94	{ LSM9DS1_MAGN_DEV_NAME },
95	{ IIS2MDC_MAGN_DEV_NAME },
96	{ LSM303C_MAGN_DEV_NAME },
97	{},
98};
99MODULE_DEVICE_TABLE(spi, st_magn_id_table);
100
101static struct spi_driver st_magn_driver = {
102	.driver = {
103		.name = "st-magn-spi",
104		.of_match_table = st_magn_of_match,
105	},
106	.probe = st_magn_spi_probe,
107	.id_table = st_magn_id_table,
108};
109module_spi_driver(st_magn_driver);
110
111MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
112MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
113MODULE_LICENSE("GPL v2");
114MODULE_IMPORT_NS(IIO_ST_SENSORS);
115