1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * STMicroelectronics LSM9DS0 IMU driver
4 *
5 * Copyright (C) 2021, Intel Corporation
6 *
7 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
8 */
9
10 #include <linux/device.h>
11 #include <linux/err.h>
12 #include <linux/module.h>
13 #include <linux/regmap.h>
14 #include <linux/regulator/consumer.h>
15
16 #include <linux/iio/common/st_sensors.h>
17 #include <linux/iio/iio.h>
18
19 #include "st_lsm9ds0.h"
20
st_lsm9ds0_probe_accel(struct st_lsm9ds0 * lsm9ds0,struct regmap * regmap)21 static int st_lsm9ds0_probe_accel(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
22 {
23 const struct st_sensor_settings *settings;
24 struct device *dev = lsm9ds0->dev;
25 struct st_sensor_data *data;
26
27 settings = st_accel_get_settings(lsm9ds0->name);
28 if (!settings) {
29 dev_err(dev, "device name %s not recognized.\n", lsm9ds0->name);
30 return -ENODEV;
31 }
32
33 lsm9ds0->accel = devm_iio_device_alloc(dev, sizeof(*data));
34 if (!lsm9ds0->accel)
35 return -ENOMEM;
36
37 lsm9ds0->accel->name = lsm9ds0->name;
38
39 data = iio_priv(lsm9ds0->accel);
40 data->sensor_settings = (struct st_sensor_settings *)settings;
41 data->irq = lsm9ds0->irq;
42 data->regmap = regmap;
43
44 return st_accel_common_probe(lsm9ds0->accel);
45 }
46
st_lsm9ds0_probe_magn(struct st_lsm9ds0 * lsm9ds0,struct regmap * regmap)47 static int st_lsm9ds0_probe_magn(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
48 {
49 const struct st_sensor_settings *settings;
50 struct device *dev = lsm9ds0->dev;
51 struct st_sensor_data *data;
52
53 settings = st_magn_get_settings(lsm9ds0->name);
54 if (!settings) {
55 dev_err(dev, "device name %s not recognized.\n", lsm9ds0->name);
56 return -ENODEV;
57 }
58
59 lsm9ds0->magn = devm_iio_device_alloc(dev, sizeof(*data));
60 if (!lsm9ds0->magn)
61 return -ENOMEM;
62
63 lsm9ds0->magn->name = lsm9ds0->name;
64
65 data = iio_priv(lsm9ds0->magn);
66 data->sensor_settings = (struct st_sensor_settings *)settings;
67 data->irq = lsm9ds0->irq;
68 data->regmap = regmap;
69
70 return st_magn_common_probe(lsm9ds0->magn);
71 }
72
st_lsm9ds0_probe(struct st_lsm9ds0 * lsm9ds0,struct regmap * regmap)73 int st_lsm9ds0_probe(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
74 {
75 struct device *dev = lsm9ds0->dev;
76 static const char * const regulator_names[] = { "vdd", "vddio" };
77 int ret;
78
79 /* Regulators not mandatory, but if requested we should enable them. */
80 ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(regulator_names),
81 regulator_names);
82 if (ret)
83 return dev_err_probe(dev, ret,
84 "unable to enable Vdd supply\n");
85
86 /* Setup accelerometer device */
87 ret = st_lsm9ds0_probe_accel(lsm9ds0, regmap);
88 if (ret)
89 return ret;
90
91 /* Setup magnetometer device */
92 return st_lsm9ds0_probe_magn(lsm9ds0, regmap);
93 }
94 EXPORT_SYMBOL_NS_GPL(st_lsm9ds0_probe, IIO_ST_SENSORS);
95
96 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
97 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU core driver");
98 MODULE_LICENSE("GPL v2");
99 MODULE_IMPORT_NS(IIO_ST_SENSORS);
100