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/slab.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};
46MODULE_DEVICE_TABLE(of, st_magn_of_match);
47
48static int st_magn_spi_probe(struct spi_device *spi)
49{
50	const struct st_sensor_settings *settings;
51	struct st_sensor_data *mdata;
52	struct iio_dev *indio_dev;
53	int err;
54
55	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
56
57	settings = st_magn_get_settings(spi->modalias);
58	if (!settings) {
59		dev_err(&spi->dev, "device name %s not recognized.\n",
60			spi->modalias);
61		return -ENODEV;
62	}
63
64	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
65	if (!indio_dev)
66		return -ENOMEM;
67
68	mdata = iio_priv(indio_dev);
69	mdata->sensor_settings = (struct st_sensor_settings *)settings;
70
71	err = st_sensors_spi_configure(indio_dev, spi);
72	if (err < 0)
73		return err;
74
75	err = st_sensors_power_enable(indio_dev);
76	if (err)
77		return err;
78
79	err = st_magn_common_probe(indio_dev);
80	if (err < 0)
81		goto st_magn_power_off;
82
83	return 0;
84
85st_magn_power_off:
86	st_sensors_power_disable(indio_dev);
87
88	return err;
89}
90
91static int st_magn_spi_remove(struct spi_device *spi)
92{
93	struct iio_dev *indio_dev = spi_get_drvdata(spi);
94
95	st_magn_common_remove(indio_dev);
96
97	st_sensors_power_disable(indio_dev);
98
99	return 0;
100}
101
102static const struct spi_device_id st_magn_id_table[] = {
103	{ LIS3MDL_MAGN_DEV_NAME },
104	{ LSM303AGR_MAGN_DEV_NAME },
105	{ LIS2MDL_MAGN_DEV_NAME },
106	{ LSM9DS1_MAGN_DEV_NAME },
107	{},
108};
109MODULE_DEVICE_TABLE(spi, st_magn_id_table);
110
111static struct spi_driver st_magn_driver = {
112	.driver = {
113		.name = "st-magn-spi",
114		.of_match_table = st_magn_of_match,
115	},
116	.probe = st_magn_spi_probe,
117	.remove = st_magn_spi_remove,
118	.id_table = st_magn_id_table,
119};
120module_spi_driver(st_magn_driver);
121
122MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
123MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
124MODULE_LICENSE("GPL v2");
125