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 | */ |
27 | static 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 | }; |
54 | MODULE_DEVICE_TABLE(of, st_magn_of_match); |
55 | |
56 | static 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(dev: &spi->dev, name: spi->modalias, len: sizeof(spi->modalias)); |
64 | |
65 | settings = st_magn_get_settings(name: 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(parent: &spi->dev, sizeof_priv: 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 | |
90 | static 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 | }; |
99 | MODULE_DEVICE_TABLE(spi, st_magn_id_table); |
100 | |
101 | static 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 | }; |
109 | module_spi_driver(st_magn_driver); |
110 | |
111 | MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>" ); |
112 | MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver" ); |
113 | MODULE_LICENSE("GPL v2" ); |
114 | MODULE_IMPORT_NS(IIO_ST_SENSORS); |
115 | |