1 // SPDX-License-Identifier: GPL-2.0-only
3 * STMicroelectronics LSM9DS0 IMU driver
5 * Copyright (C) 2021, Intel Corporation
7 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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>
16 #include <linux/iio/common/st_sensors.h>
17 #include <linux/iio/iio.h>
19 #include "st_lsm9ds0.h"
21 static int st_lsm9ds0_power_enable(struct device *dev, struct st_lsm9ds0 *lsm9ds0)
25 /* Regulators not mandatory, but if requested we should enable them. */
26 lsm9ds0->vdd = devm_regulator_get(dev, "vdd");
27 if (IS_ERR(lsm9ds0->vdd)) {
28 dev_err(dev, "unable to get Vdd supply\n");
29 return PTR_ERR(lsm9ds0->vdd);
31 ret = regulator_enable(lsm9ds0->vdd);
33 dev_warn(dev, "Failed to enable specified Vdd supply\n");
37 lsm9ds0->vdd_io = devm_regulator_get(dev, "vddio");
38 if (IS_ERR(lsm9ds0->vdd_io)) {
39 dev_err(dev, "unable to get Vdd_IO supply\n");
40 regulator_disable(lsm9ds0->vdd);
41 return PTR_ERR(lsm9ds0->vdd_io);
43 ret = regulator_enable(lsm9ds0->vdd_io);
45 dev_warn(dev, "Failed to enable specified Vdd_IO supply\n");
46 regulator_disable(lsm9ds0->vdd);
53 static void st_lsm9ds0_power_disable(void *data)
55 struct st_lsm9ds0 *lsm9ds0 = data;
57 regulator_disable(lsm9ds0->vdd_io);
58 regulator_disable(lsm9ds0->vdd);
61 static int devm_st_lsm9ds0_power_enable(struct st_lsm9ds0 *lsm9ds0)
63 struct device *dev = lsm9ds0->dev;
66 ret = st_lsm9ds0_power_enable(dev, lsm9ds0);
70 return devm_add_action_or_reset(dev, st_lsm9ds0_power_disable, lsm9ds0);
73 static int st_lsm9ds0_probe_accel(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
75 const struct st_sensor_settings *settings;
76 struct device *dev = lsm9ds0->dev;
77 struct st_sensor_data *data;
79 settings = st_accel_get_settings(lsm9ds0->name);
81 dev_err(dev, "device name %s not recognized.\n", lsm9ds0->name);
85 lsm9ds0->accel = devm_iio_device_alloc(dev, sizeof(*data));
89 lsm9ds0->accel->name = lsm9ds0->name;
91 data = iio_priv(lsm9ds0->accel);
92 data->sensor_settings = (struct st_sensor_settings *)settings;
94 data->irq = lsm9ds0->irq;
95 data->regmap = regmap;
96 data->vdd = lsm9ds0->vdd;
97 data->vdd_io = lsm9ds0->vdd_io;
99 return st_accel_common_probe(lsm9ds0->accel);
102 static int st_lsm9ds0_probe_magn(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
104 const struct st_sensor_settings *settings;
105 struct device *dev = lsm9ds0->dev;
106 struct st_sensor_data *data;
108 settings = st_magn_get_settings(lsm9ds0->name);
110 dev_err(dev, "device name %s not recognized.\n", lsm9ds0->name);
114 lsm9ds0->magn = devm_iio_device_alloc(dev, sizeof(*data));
118 lsm9ds0->magn->name = lsm9ds0->name;
120 data = iio_priv(lsm9ds0->magn);
121 data->sensor_settings = (struct st_sensor_settings *)settings;
123 data->irq = lsm9ds0->irq;
124 data->regmap = regmap;
125 data->vdd = lsm9ds0->vdd;
126 data->vdd_io = lsm9ds0->vdd_io;
128 return st_magn_common_probe(lsm9ds0->magn);
131 int st_lsm9ds0_probe(struct st_lsm9ds0 *lsm9ds0, struct regmap *regmap)
135 ret = devm_st_lsm9ds0_power_enable(lsm9ds0);
139 /* Setup accelerometer device */
140 ret = st_lsm9ds0_probe_accel(lsm9ds0, regmap);
144 /* Setup magnetometer device */
145 ret = st_lsm9ds0_probe_magn(lsm9ds0, regmap);
147 st_accel_common_remove(lsm9ds0->accel);
151 EXPORT_SYMBOL_GPL(st_lsm9ds0_probe);
153 int st_lsm9ds0_remove(struct st_lsm9ds0 *lsm9ds0)
155 st_magn_common_remove(lsm9ds0->magn);
156 st_accel_common_remove(lsm9ds0->accel);
160 EXPORT_SYMBOL_GPL(st_lsm9ds0_remove);
162 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
163 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU core driver");
164 MODULE_LICENSE("GPL v2");