1 // SPDX-License-Identifier: GPL-2.0-only
4 #include <linux/i2c-mux.h>
5 #include <linux/iio/iio.h>
6 #include <linux/module.h>
7 #include <linux/regmap.h>
8 #include <linux/pm_runtime.h>
12 static const struct regmap_config mpu3050_i2c_regmap_config = {
17 static int mpu3050_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
19 struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
21 /* Just power up the device, that is all that is needed */
22 pm_runtime_get_sync(mpu3050->dev);
26 static int mpu3050_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
28 struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
30 pm_runtime_mark_last_busy(mpu3050->dev);
31 pm_runtime_put_autosuspend(mpu3050->dev);
35 static int mpu3050_i2c_probe(struct i2c_client *client)
37 const struct i2c_device_id *id = i2c_client_get_device_id(client);
38 struct regmap *regmap;
40 struct mpu3050 *mpu3050;
43 if (!i2c_check_functionality(client->adapter,
44 I2C_FUNC_SMBUS_I2C_BLOCK))
52 regmap = devm_regmap_init_i2c(client, &mpu3050_i2c_regmap_config);
54 dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
56 return PTR_ERR(regmap);
59 ret = mpu3050_common_probe(&client->dev, regmap, client->irq, name);
63 /* The main driver is up, now register the I2C mux */
64 mpu3050 = iio_priv(dev_get_drvdata(&client->dev));
65 mpu3050->i2cmux = i2c_mux_alloc(client->adapter, &client->dev,
66 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
67 mpu3050_i2c_bypass_select,
68 mpu3050_i2c_bypass_deselect);
69 /* Just fail the mux, there is no point in killing the driver */
71 dev_err(&client->dev, "failed to allocate I2C mux\n");
73 mpu3050->i2cmux->priv = mpu3050;
74 /* Ignore failure, not critical */
75 i2c_mux_add_adapter(mpu3050->i2cmux, 0, 0);
81 static void mpu3050_i2c_remove(struct i2c_client *client)
83 struct iio_dev *indio_dev = dev_get_drvdata(&client->dev);
84 struct mpu3050 *mpu3050 = iio_priv(indio_dev);
87 i2c_mux_del_adapters(mpu3050->i2cmux);
89 mpu3050_common_remove(&client->dev);
93 * device id table is used to identify what device can be
94 * supported by this driver
96 static const struct i2c_device_id mpu3050_i2c_id[] = {
100 MODULE_DEVICE_TABLE(i2c, mpu3050_i2c_id);
102 static const struct of_device_id mpu3050_i2c_of_match[] = {
103 { .compatible = "invensense,mpu3050", .data = "mpu3050" },
104 /* Deprecated vendor ID from the Input driver */
105 { .compatible = "invn,mpu3050", .data = "mpu3050" },
108 MODULE_DEVICE_TABLE(of, mpu3050_i2c_of_match);
110 static struct i2c_driver mpu3050_i2c_driver = {
111 .probe = mpu3050_i2c_probe,
112 .remove = mpu3050_i2c_remove,
113 .id_table = mpu3050_i2c_id,
115 .of_match_table = mpu3050_i2c_of_match,
116 .name = "mpu3050-i2c",
117 .pm = pm_ptr(&mpu3050_dev_pm_ops),
120 module_i2c_driver(mpu3050_i2c_driver);
122 MODULE_AUTHOR("Linus Walleij");
123 MODULE_DESCRIPTION("Invensense MPU3050 gyroscope driver");
124 MODULE_LICENSE("GPL");