1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * STMicroelectronics gyroscopes 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_gyro.h"
19 
20 /*
21  * For new single-chip sensors use <device_name> as compatible string.
22  * For old single-chip devices keep <device_name>-gyro to maintain
23  * compatibility
24  */
25 static const struct of_device_id st_gyro_of_match[] = {
26 	{
27 		.compatible = "st,l3g4200d-gyro",
28 		.data = L3G4200D_GYRO_DEV_NAME,
29 	},
30 	{
31 		.compatible = "st,lsm330d-gyro",
32 		.data = LSM330D_GYRO_DEV_NAME,
33 	},
34 	{
35 		.compatible = "st,lsm330dl-gyro",
36 		.data = LSM330DL_GYRO_DEV_NAME,
37 	},
38 	{
39 		.compatible = "st,lsm330dlc-gyro",
40 		.data = LSM330DLC_GYRO_DEV_NAME,
41 	},
42 	{
43 		.compatible = "st,l3gd20-gyro",
44 		.data = L3GD20_GYRO_DEV_NAME,
45 	},
46 	{
47 		.compatible = "st,l3gd20h-gyro",
48 		.data = L3GD20H_GYRO_DEV_NAME,
49 	},
50 	{
51 		.compatible = "st,l3g4is-gyro",
52 		.data = L3G4IS_GYRO_DEV_NAME,
53 	},
54 	{
55 		.compatible = "st,lsm330-gyro",
56 		.data = LSM330_GYRO_DEV_NAME,
57 	},
58 	{
59 		.compatible = "st,lsm9ds0-gyro",
60 		.data = LSM9DS0_GYRO_DEV_NAME,
61 	},
62 	{},
63 };
64 MODULE_DEVICE_TABLE(of, st_gyro_of_match);
65 
st_gyro_spi_probe(struct spi_device * spi)66 static int st_gyro_spi_probe(struct spi_device *spi)
67 {
68 	const struct st_sensor_settings *settings;
69 	struct st_sensor_data *gdata;
70 	struct iio_dev *indio_dev;
71 	int err;
72 
73 	st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
74 
75 	settings = st_gyro_get_settings(spi->modalias);
76 	if (!settings) {
77 		dev_err(&spi->dev, "device name %s not recognized.\n",
78 			spi->modalias);
79 		return -ENODEV;
80 	}
81 
82 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*gdata));
83 	if (!indio_dev)
84 		return -ENOMEM;
85 
86 	gdata = iio_priv(indio_dev);
87 	gdata->sensor_settings = (struct st_sensor_settings *)settings;
88 
89 	err = st_sensors_spi_configure(indio_dev, spi);
90 	if (err < 0)
91 		return err;
92 
93 	err = st_sensors_power_enable(indio_dev);
94 	if (err)
95 		return err;
96 
97 	return st_gyro_common_probe(indio_dev);
98 }
99 
100 static const struct spi_device_id st_gyro_id_table[] = {
101 	{ L3G4200D_GYRO_DEV_NAME },
102 	{ LSM330D_GYRO_DEV_NAME },
103 	{ LSM330DL_GYRO_DEV_NAME },
104 	{ LSM330DLC_GYRO_DEV_NAME },
105 	{ L3GD20_GYRO_DEV_NAME },
106 	{ L3GD20H_GYRO_DEV_NAME },
107 	{ L3G4IS_GYRO_DEV_NAME },
108 	{ LSM330_GYRO_DEV_NAME },
109 	{ LSM9DS0_GYRO_DEV_NAME },
110 	{},
111 };
112 MODULE_DEVICE_TABLE(spi, st_gyro_id_table);
113 
114 static struct spi_driver st_gyro_driver = {
115 	.driver = {
116 		.name = "st-gyro-spi",
117 		.of_match_table = st_gyro_of_match,
118 	},
119 	.probe = st_gyro_spi_probe,
120 	.id_table = st_gyro_id_table,
121 };
122 module_spi_driver(st_gyro_driver);
123 
124 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
125 MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver");
126 MODULE_LICENSE("GPL v2");
127