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 <linux/property.h>
14 #include "inv_mpu_iio.h"
16 static const struct regmap_config inv_mpu_regmap_config = {
21 static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id)
26 static bool inv_mpu_i2c_aux_bus(struct device *dev)
28 struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
30 switch (st->chip_type) {
36 /* no i2c auxiliary bus on the chip */
41 if (st->magn_disabled)
50 static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev)
52 struct inv_mpu6050_state *st = iio_priv(indio_dev);
53 struct device *dev = indio_dev->dev.parent;
54 struct device_node *mux_node;
58 * MPU9xxx magnetometer support requires to disable i2c auxiliary bus.
59 * To ensure backward compatibility with existing setups, do not disable
60 * i2c auxiliary bus if it used.
61 * Check for i2c-gate node in devicetree and set magnetometer disabled.
62 * Only MPU6500 is supported by ACPI, no need to check.
64 switch (st->chip_type) {
68 mux_node = of_get_child_by_name(dev->of_node, "i2c-gate");
69 if (mux_node != NULL) {
70 st->magn_disabled = true;
71 dev_warn(dev, "disable internal use of magnetometer\n");
73 of_node_put(mux_node);
79 /* enable i2c bypass when using i2c auxiliary bus */
80 if (inv_mpu_i2c_aux_bus(dev)) {
81 ret = regmap_write(st->map, st->reg->int_pin_cfg,
82 st->irq_mask | INV_MPU6050_BIT_BYPASS_EN);
91 * inv_mpu_probe() - probe function.
92 * @client: i2c client.
95 * Returns 0 on success, a negative error code otherwise.
97 static int inv_mpu_probe(struct i2c_client *client,
98 const struct i2c_device_id *id)
101 struct inv_mpu6050_state *st;
103 enum inv_devices chip_type;
104 struct regmap *regmap;
107 if (!i2c_check_functionality(client->adapter,
108 I2C_FUNC_SMBUS_I2C_BLOCK))
111 match = device_get_match_data(&client->dev);
113 chip_type = (uintptr_t)match;
116 chip_type = (enum inv_devices)
123 regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config);
124 if (IS_ERR(regmap)) {
125 dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
127 return PTR_ERR(regmap);
130 result = inv_mpu_core_probe(regmap, client->irq, name,
131 inv_mpu_i2c_aux_setup, chip_type);
135 st = iio_priv(dev_get_drvdata(&client->dev));
136 if (inv_mpu_i2c_aux_bus(&client->dev)) {
137 /* declare i2c auxiliary bus */
138 st->muxc = i2c_mux_alloc(client->adapter, &client->dev,
139 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
140 inv_mpu6050_select_bypass, NULL);
143 st->muxc->priv = dev_get_drvdata(&client->dev);
144 result = i2c_mux_add_adapter(st->muxc, 0, 0, 0);
147 result = inv_mpu_acpi_create_mux_client(client);
155 i2c_mux_del_adapters(st->muxc);
159 static int inv_mpu_remove(struct i2c_client *client)
161 struct iio_dev *indio_dev = i2c_get_clientdata(client);
162 struct inv_mpu6050_state *st = iio_priv(indio_dev);
165 inv_mpu_acpi_delete_mux_client(client);
166 i2c_mux_del_adapters(st->muxc);
173 * device id table is used to identify what device can be
174 * supported by this driver
176 static const struct i2c_device_id inv_mpu_id[] = {
177 {"mpu6050", INV_MPU6050},
178 {"mpu6500", INV_MPU6500},
179 {"mpu6515", INV_MPU6515},
180 {"mpu6880", INV_MPU6880},
181 {"mpu9150", INV_MPU9150},
182 {"mpu9250", INV_MPU9250},
183 {"mpu9255", INV_MPU9255},
184 {"icm20608", INV_ICM20608},
185 {"icm20609", INV_ICM20609},
186 {"icm20689", INV_ICM20689},
187 {"icm20602", INV_ICM20602},
188 {"icm20690", INV_ICM20690},
189 {"iam20680", INV_IAM20680},
193 MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
195 static const struct of_device_id inv_of_match[] = {
197 .compatible = "invensense,mpu6050",
198 .data = (void *)INV_MPU6050
201 .compatible = "invensense,mpu6500",
202 .data = (void *)INV_MPU6500
205 .compatible = "invensense,mpu6515",
206 .data = (void *)INV_MPU6515
209 .compatible = "invensense,mpu6880",
210 .data = (void *)INV_MPU6880
213 .compatible = "invensense,mpu9150",
214 .data = (void *)INV_MPU9150
217 .compatible = "invensense,mpu9250",
218 .data = (void *)INV_MPU9250
221 .compatible = "invensense,mpu9255",
222 .data = (void *)INV_MPU9255
225 .compatible = "invensense,icm20608",
226 .data = (void *)INV_ICM20608
229 .compatible = "invensense,icm20609",
230 .data = (void *)INV_ICM20609
233 .compatible = "invensense,icm20689",
234 .data = (void *)INV_ICM20689
237 .compatible = "invensense,icm20602",
238 .data = (void *)INV_ICM20602
241 .compatible = "invensense,icm20690",
242 .data = (void *)INV_ICM20690
245 .compatible = "invensense,iam20680",
246 .data = (void *)INV_IAM20680
250 MODULE_DEVICE_TABLE(of, inv_of_match);
252 static const struct acpi_device_id __maybe_unused inv_acpi_match[] = {
253 {"INVN6500", INV_MPU6500},
257 MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
259 static struct i2c_driver inv_mpu_driver = {
260 .probe = inv_mpu_probe,
261 .remove = inv_mpu_remove,
262 .id_table = inv_mpu_id,
264 .of_match_table = inv_of_match,
265 .acpi_match_table = ACPI_PTR(inv_acpi_match),
266 .name = "inv-mpu6050-i2c",
267 .pm = &inv_mpu_pmops,
271 module_i2c_driver(inv_mpu_driver);
273 MODULE_AUTHOR("Invensense Corporation");
274 MODULE_DESCRIPTION("Invensense device MPU6050 driver");
275 MODULE_LICENSE("GPL");