| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2012 Invensense, Inc. |
| */ |
| |
| #include <linux/acpi.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/i2c.h> |
| #include <linux/iio/iio.h> |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/property.h> |
| #include "inv_mpu_iio.h" |
| |
| static const struct regmap_config inv_mpu_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| }; |
| |
| static int inv_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id) |
| { |
| return 0; |
| } |
| |
| static bool inv_mpu_i2c_aux_bus(struct device *dev) |
| { |
| struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev)); |
| |
| switch (st->chip_type) { |
| case INV_ICM20608: |
| case INV_ICM20609: |
| case INV_ICM20689: |
| case INV_ICM20602: |
| case INV_IAM20680: |
| /* no i2c auxiliary bus on the chip */ |
| return false; |
| case INV_MPU9150: |
| case INV_MPU9250: |
| case INV_MPU9255: |
| if (st->magn_disabled) |
| return true; |
| else |
| return false; |
| default: |
| return true; |
| } |
| } |
| |
| static int inv_mpu_i2c_aux_setup(struct iio_dev *indio_dev) |
| { |
| struct inv_mpu6050_state *st = iio_priv(indio_dev); |
| struct device *dev = indio_dev->dev.parent; |
| struct device_node *mux_node; |
| int ret; |
| |
| /* |
| * MPU9xxx magnetometer support requires to disable i2c auxiliary bus. |
| * To ensure backward compatibility with existing setups, do not disable |
| * i2c auxiliary bus if it used. |
| * Check for i2c-gate node in devicetree and set magnetometer disabled. |
| * Only MPU6500 is supported by ACPI, no need to check. |
| */ |
| switch (st->chip_type) { |
| case INV_MPU9150: |
| case INV_MPU9250: |
| case INV_MPU9255: |
| mux_node = of_get_child_by_name(dev->of_node, "i2c-gate"); |
| if (mux_node != NULL) { |
| st->magn_disabled = true; |
| dev_warn(dev, "disable internal use of magnetometer\n"); |
| } |
| of_node_put(mux_node); |
| break; |
| default: |
| break; |
| } |
| |
| /* enable i2c bypass when using i2c auxiliary bus */ |
| if (inv_mpu_i2c_aux_bus(dev)) { |
| ret = regmap_write(st->map, st->reg->int_pin_cfg, |
| st->irq_mask | INV_MPU6050_BIT_BYPASS_EN); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * inv_mpu_probe() - probe function. |
| * @client: i2c client. |
| * @id: i2c device id. |
| * |
| * Returns 0 on success, a negative error code otherwise. |
| */ |
| static int inv_mpu_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| const void *match; |
| struct inv_mpu6050_state *st; |
| int result; |
| enum inv_devices chip_type; |
| struct regmap *regmap; |
| const char *name; |
| |
| if (!i2c_check_functionality(client->adapter, |
| I2C_FUNC_SMBUS_I2C_BLOCK)) |
| return -EOPNOTSUPP; |
| |
| match = device_get_match_data(&client->dev); |
| if (match) { |
| chip_type = (enum inv_devices)match; |
| name = client->name; |
| } else if (id) { |
| chip_type = (enum inv_devices) |
| id->driver_data; |
| name = id->name; |
| } else { |
| return -ENOSYS; |
| } |
| |
| regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config); |
| if (IS_ERR(regmap)) { |
| dev_err(&client->dev, "Failed to register i2c regmap: %pe\n", |
| regmap); |
| return PTR_ERR(regmap); |
| } |
| |
| result = inv_mpu_core_probe(regmap, client->irq, name, |
| inv_mpu_i2c_aux_setup, chip_type); |
| if (result < 0) |
| return result; |
| |
| st = iio_priv(dev_get_drvdata(&client->dev)); |
| if (inv_mpu_i2c_aux_bus(&client->dev)) { |
| /* declare i2c auxiliary bus */ |
| st->muxc = i2c_mux_alloc(client->adapter, &client->dev, |
| 1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE, |
| inv_mpu6050_select_bypass, NULL); |
| if (!st->muxc) |
| return -ENOMEM; |
| st->muxc->priv = dev_get_drvdata(&client->dev); |
| result = i2c_mux_add_adapter(st->muxc, 0, 0, 0); |
| if (result) |
| return result; |
| result = inv_mpu_acpi_create_mux_client(client); |
| if (result) |
| goto out_del_mux; |
| } |
| |
| return 0; |
| |
| out_del_mux: |
| i2c_mux_del_adapters(st->muxc); |
| return result; |
| } |
| |
| static int inv_mpu_remove(struct i2c_client *client) |
| { |
| struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| struct inv_mpu6050_state *st = iio_priv(indio_dev); |
| |
| if (st->muxc) { |
| inv_mpu_acpi_delete_mux_client(client); |
| i2c_mux_del_adapters(st->muxc); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * device id table is used to identify what device can be |
| * supported by this driver |
| */ |
| static const struct i2c_device_id inv_mpu_id[] = { |
| {"mpu6050", INV_MPU6050}, |
| {"mpu6500", INV_MPU6500}, |
| {"mpu6515", INV_MPU6515}, |
| {"mpu6880", INV_MPU6880}, |
| {"mpu9150", INV_MPU9150}, |
| {"mpu9250", INV_MPU9250}, |
| {"mpu9255", INV_MPU9255}, |
| {"icm20608", INV_ICM20608}, |
| {"icm20609", INV_ICM20609}, |
| {"icm20689", INV_ICM20689}, |
| {"icm20602", INV_ICM20602}, |
| {"icm20690", INV_ICM20690}, |
| {"iam20680", INV_IAM20680}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(i2c, inv_mpu_id); |
| |
| static const struct of_device_id inv_of_match[] = { |
| { |
| .compatible = "invensense,mpu6050", |
| .data = (void *)INV_MPU6050 |
| }, |
| { |
| .compatible = "invensense,mpu6500", |
| .data = (void *)INV_MPU6500 |
| }, |
| { |
| .compatible = "invensense,mpu6515", |
| .data = (void *)INV_MPU6515 |
| }, |
| { |
| .compatible = "invensense,mpu6880", |
| .data = (void *)INV_MPU6880 |
| }, |
| { |
| .compatible = "invensense,mpu9150", |
| .data = (void *)INV_MPU9150 |
| }, |
| { |
| .compatible = "invensense,mpu9250", |
| .data = (void *)INV_MPU9250 |
| }, |
| { |
| .compatible = "invensense,mpu9255", |
| .data = (void *)INV_MPU9255 |
| }, |
| { |
| .compatible = "invensense,icm20608", |
| .data = (void *)INV_ICM20608 |
| }, |
| { |
| .compatible = "invensense,icm20609", |
| .data = (void *)INV_ICM20609 |
| }, |
| { |
| .compatible = "invensense,icm20689", |
| .data = (void *)INV_ICM20689 |
| }, |
| { |
| .compatible = "invensense,icm20602", |
| .data = (void *)INV_ICM20602 |
| }, |
| { |
| .compatible = "invensense,icm20690", |
| .data = (void *)INV_ICM20690 |
| }, |
| { |
| .compatible = "invensense,iam20680", |
| .data = (void *)INV_IAM20680 |
| }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, inv_of_match); |
| |
| static const struct acpi_device_id __maybe_unused inv_acpi_match[] = { |
| {"INVN6500", INV_MPU6500}, |
| { }, |
| }; |
| |
| MODULE_DEVICE_TABLE(acpi, inv_acpi_match); |
| |
| static struct i2c_driver inv_mpu_driver = { |
| .probe = inv_mpu_probe, |
| .remove = inv_mpu_remove, |
| .id_table = inv_mpu_id, |
| .driver = { |
| .of_match_table = inv_of_match, |
| .acpi_match_table = ACPI_PTR(inv_acpi_match), |
| .name = "inv-mpu6050-i2c", |
| .pm = &inv_mpu_pmops, |
| }, |
| }; |
| |
| module_i2c_driver(inv_mpu_driver); |
| |
| MODULE_AUTHOR("Invensense Corporation"); |
| MODULE_DESCRIPTION("Invensense device MPU6050 driver"); |
| MODULE_LICENSE("GPL"); |