1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * STMicroelectronics magnetometers driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2012-2013 STMicroelectronics Inc.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Denis Ciocca <denis.ciocca@st.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/slab.h>
13*4882a593Smuzhiyun #include <linux/spi/spi.h>
14*4882a593Smuzhiyun #include <linux/iio/iio.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <linux/iio/common/st_sensors.h>
17*4882a593Smuzhiyun #include <linux/iio/common/st_sensors_spi.h>
18*4882a593Smuzhiyun #include "st_magn.h"
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun /*
21*4882a593Smuzhiyun * For new single-chip sensors use <device_name> as compatible string.
22*4882a593Smuzhiyun * For old single-chip devices keep <device_name>-magn to maintain
23*4882a593Smuzhiyun * compatibility
24*4882a593Smuzhiyun * For multi-chip devices, use <device_name>-magn to distinguish which
25*4882a593Smuzhiyun * capability is being used
26*4882a593Smuzhiyun */
27*4882a593Smuzhiyun static const struct of_device_id st_magn_of_match[] = {
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun .compatible = "st,lis3mdl-magn",
30*4882a593Smuzhiyun .data = LIS3MDL_MAGN_DEV_NAME,
31*4882a593Smuzhiyun },
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun .compatible = "st,lsm303agr-magn",
34*4882a593Smuzhiyun .data = LSM303AGR_MAGN_DEV_NAME,
35*4882a593Smuzhiyun },
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun .compatible = "st,lis2mdl",
38*4882a593Smuzhiyun .data = LIS2MDL_MAGN_DEV_NAME,
39*4882a593Smuzhiyun },
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun .compatible = "st,lsm9ds1-magn",
42*4882a593Smuzhiyun .data = LSM9DS1_MAGN_DEV_NAME,
43*4882a593Smuzhiyun },
44*4882a593Smuzhiyun {}
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, st_magn_of_match);
47*4882a593Smuzhiyun
st_magn_spi_probe(struct spi_device * spi)48*4882a593Smuzhiyun static int st_magn_spi_probe(struct spi_device *spi)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun const struct st_sensor_settings *settings;
51*4882a593Smuzhiyun struct st_sensor_data *mdata;
52*4882a593Smuzhiyun struct iio_dev *indio_dev;
53*4882a593Smuzhiyun int err;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun settings = st_magn_get_settings(spi->modalias);
58*4882a593Smuzhiyun if (!settings) {
59*4882a593Smuzhiyun dev_err(&spi->dev, "device name %s not recognized.\n",
60*4882a593Smuzhiyun spi->modalias);
61*4882a593Smuzhiyun return -ENODEV;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
65*4882a593Smuzhiyun if (!indio_dev)
66*4882a593Smuzhiyun return -ENOMEM;
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun mdata = iio_priv(indio_dev);
69*4882a593Smuzhiyun mdata->sensor_settings = (struct st_sensor_settings *)settings;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun err = st_sensors_spi_configure(indio_dev, spi);
72*4882a593Smuzhiyun if (err < 0)
73*4882a593Smuzhiyun return err;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun err = st_sensors_power_enable(indio_dev);
76*4882a593Smuzhiyun if (err)
77*4882a593Smuzhiyun return err;
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun err = st_magn_common_probe(indio_dev);
80*4882a593Smuzhiyun if (err < 0)
81*4882a593Smuzhiyun goto st_magn_power_off;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun return 0;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun st_magn_power_off:
86*4882a593Smuzhiyun st_sensors_power_disable(indio_dev);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun return err;
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
st_magn_spi_remove(struct spi_device * spi)91*4882a593Smuzhiyun static int st_magn_spi_remove(struct spi_device *spi)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun struct iio_dev *indio_dev = spi_get_drvdata(spi);
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun st_magn_common_remove(indio_dev);
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun st_sensors_power_disable(indio_dev);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun return 0;
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun static const struct spi_device_id st_magn_id_table[] = {
103*4882a593Smuzhiyun { LIS3MDL_MAGN_DEV_NAME },
104*4882a593Smuzhiyun { LSM303AGR_MAGN_DEV_NAME },
105*4882a593Smuzhiyun { LIS2MDL_MAGN_DEV_NAME },
106*4882a593Smuzhiyun { LSM9DS1_MAGN_DEV_NAME },
107*4882a593Smuzhiyun {},
108*4882a593Smuzhiyun };
109*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, st_magn_id_table);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun static struct spi_driver st_magn_driver = {
112*4882a593Smuzhiyun .driver = {
113*4882a593Smuzhiyun .name = "st-magn-spi",
114*4882a593Smuzhiyun .of_match_table = st_magn_of_match,
115*4882a593Smuzhiyun },
116*4882a593Smuzhiyun .probe = st_magn_spi_probe,
117*4882a593Smuzhiyun .remove = st_magn_spi_remove,
118*4882a593Smuzhiyun .id_table = st_magn_id_table,
119*4882a593Smuzhiyun };
120*4882a593Smuzhiyun module_spi_driver(st_magn_driver);
121*4882a593Smuzhiyun
122*4882a593Smuzhiyun MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
123*4882a593Smuzhiyun MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
124*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
125