1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Invensense, Inc.
6 #include <linux/acpi.h>
7 #include <linux/delay.h>
10 #include <linux/iio/iio.h>
11 #include <linux/module.h>
12 #include <linux/of_device.h>
13 #include "inv_mpu_iio.h"
15 static const struct regmap_config inv_mpu_regmap_config = {
20 static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id)
22 struct iio_dev *indio_dev = i2c_mux_priv(muxc);
23 struct inv_mpu6050_state *st = iio_priv(indio_dev);
26 mutex_lock(&st->lock);
28 ret = inv_mpu6050_set_power_itg(st, true);
32 ret = regmap_write(st->map, st->reg->int_pin_cfg,
33 st->irq_mask | INV_MPU6050_BIT_BYPASS_EN);
36 mutex_unlock(&st->lock);
41 static int inv_mpu6050_deselect_bypass(struct i2c_mux_core *muxc, u32 chan_id)
43 struct iio_dev *indio_dev = i2c_mux_priv(muxc);
44 struct inv_mpu6050_state *st = iio_priv(indio_dev);
46 mutex_lock(&st->lock);
48 /* It doesn't really matter if any of the calls fail */
49 regmap_write(st->map, st->reg->int_pin_cfg, st->irq_mask);
50 inv_mpu6050_set_power_itg(st, false);
52 mutex_unlock(&st->lock);
57 static const char *inv_mpu_match_acpi_device(struct device *dev,
58 enum inv_devices *chip_id)
60 const struct acpi_device_id *id;
62 id = acpi_match_device(dev->driver->acpi_match_table, dev);
66 *chip_id = (int)id->driver_data;
71 static bool inv_mpu_i2c_aux_bus(struct device *dev)
73 struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
75 switch (st->chip_type) {
78 /* no i2c auxiliary bus on the chip */
82 if (st->magn_disabled)
92 * MPU9xxx magnetometer support requires to disable i2c auxiliary bus support.
93 * To ensure backward compatibility with existing setups, do not disable
94 * i2c auxiliary bus if it used.
95 * Check for i2c-gate node in devicetree and set magnetometer disabled.
96 * Only MPU6500 is supported by ACPI, no need to check.
98 static int inv_mpu_magn_disable(struct iio_dev *indio_dev)
100 struct inv_mpu6050_state *st = iio_priv(indio_dev);
101 struct device *dev = indio_dev->dev.parent;
102 struct device_node *mux_node;
104 switch (st->chip_type) {
107 mux_node = of_get_child_by_name(dev->of_node, "i2c-gate");
108 if (mux_node != NULL) {
109 st->magn_disabled = true;
110 dev_warn(dev, "disable internal use of magnetometer\n");
112 of_node_put(mux_node);
122 * inv_mpu_probe() - probe function.
123 * @client: i2c client.
124 * @id: i2c device id.
126 * Returns 0 on success, a negative error code otherwise.
128 static int inv_mpu_probe(struct i2c_client *client,
129 const struct i2c_device_id *id)
131 struct inv_mpu6050_state *st;
133 enum inv_devices chip_type;
134 struct regmap *regmap;
137 if (!i2c_check_functionality(client->adapter,
138 I2C_FUNC_SMBUS_I2C_BLOCK))
141 if (client->dev.of_node) {
142 chip_type = (enum inv_devices)
143 of_device_get_match_data(&client->dev);
146 chip_type = (enum inv_devices)
149 } else if (ACPI_HANDLE(&client->dev)) {
150 name = inv_mpu_match_acpi_device(&client->dev, &chip_type);
157 regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config);
158 if (IS_ERR(regmap)) {
159 dev_err(&client->dev, "Failed to register i2c regmap %d\n",
160 (int)PTR_ERR(regmap));
161 return PTR_ERR(regmap);
164 result = inv_mpu_core_probe(regmap, client->irq, name,
165 inv_mpu_magn_disable, chip_type);
169 st = iio_priv(dev_get_drvdata(&client->dev));
170 if (inv_mpu_i2c_aux_bus(&client->dev)) {
171 /* declare i2c auxiliary bus */
172 st->muxc = i2c_mux_alloc(client->adapter, &client->dev,
173 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
174 inv_mpu6050_select_bypass,
175 inv_mpu6050_deselect_bypass);
178 st->muxc->priv = dev_get_drvdata(&client->dev);
179 result = i2c_mux_add_adapter(st->muxc, 0, 0, 0);
182 result = inv_mpu_acpi_create_mux_client(client);
190 i2c_mux_del_adapters(st->muxc);
194 static int inv_mpu_remove(struct i2c_client *client)
196 struct iio_dev *indio_dev = i2c_get_clientdata(client);
197 struct inv_mpu6050_state *st = iio_priv(indio_dev);
200 inv_mpu_acpi_delete_mux_client(client);
201 i2c_mux_del_adapters(st->muxc);
208 * device id table is used to identify what device can be
209 * supported by this driver
211 static const struct i2c_device_id inv_mpu_id[] = {
212 {"mpu6050", INV_MPU6050},
213 {"mpu6500", INV_MPU6500},
214 {"mpu6515", INV_MPU6515},
215 {"mpu9150", INV_MPU9150},
216 {"mpu9250", INV_MPU9250},
217 {"mpu9255", INV_MPU9255},
218 {"icm20608", INV_ICM20608},
219 {"icm20602", INV_ICM20602},
223 MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
225 static const struct of_device_id inv_of_match[] = {
227 .compatible = "invensense,mpu6050",
228 .data = (void *)INV_MPU6050
231 .compatible = "invensense,mpu6500",
232 .data = (void *)INV_MPU6500
235 .compatible = "invensense,mpu6515",
236 .data = (void *)INV_MPU6515
239 .compatible = "invensense,mpu9150",
240 .data = (void *)INV_MPU9150
243 .compatible = "invensense,mpu9250",
244 .data = (void *)INV_MPU9250
247 .compatible = "invensense,mpu9255",
248 .data = (void *)INV_MPU9255
251 .compatible = "invensense,icm20608",
252 .data = (void *)INV_ICM20608
255 .compatible = "invensense,icm20602",
256 .data = (void *)INV_ICM20602
260 MODULE_DEVICE_TABLE(of, inv_of_match);
262 static const struct acpi_device_id inv_acpi_match[] = {
263 {"INVN6500", INV_MPU6500},
267 MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
269 static struct i2c_driver inv_mpu_driver = {
270 .probe = inv_mpu_probe,
271 .remove = inv_mpu_remove,
272 .id_table = inv_mpu_id,
274 .of_match_table = inv_of_match,
275 .acpi_match_table = ACPI_PTR(inv_acpi_match),
276 .name = "inv-mpu6050-i2c",
277 .pm = &inv_mpu_pmops,
281 module_i2c_driver(inv_mpu_driver);
283 MODULE_AUTHOR("Invensense Corporation");
284 MODULE_DESCRIPTION("Invensense device MPU6050 driver");
285 MODULE_LICENSE("GPL");