// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Invensense, Inc. */ #include #include #include #include #include #include #include #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) { struct iio_dev *indio_dev = i2c_mux_priv(muxc); struct inv_mpu6050_state *st = iio_priv(indio_dev); int ret; mutex_lock(&st->lock); ret = inv_mpu6050_set_power_itg(st, true); if (ret) goto error_unlock; ret = regmap_write(st->map, st->reg->int_pin_cfg, st->irq_mask | INV_MPU6050_BIT_BYPASS_EN); error_unlock: mutex_unlock(&st->lock); return ret; } static int inv_mpu6050_deselect_bypass(struct i2c_mux_core *muxc, u32 chan_id) { struct iio_dev *indio_dev = i2c_mux_priv(muxc); struct inv_mpu6050_state *st = iio_priv(indio_dev); mutex_lock(&st->lock); /* It doesn't really matter if any of the calls fail */ regmap_write(st->map, st->reg->int_pin_cfg, st->irq_mask); inv_mpu6050_set_power_itg(st, false); mutex_unlock(&st->lock); return 0; } static const char *inv_mpu_match_acpi_device(struct device *dev, enum inv_devices *chip_id) { const struct acpi_device_id *id; id = acpi_match_device(dev->driver->acpi_match_table, dev); if (!id) return NULL; *chip_id = (int)id->driver_data; return dev_name(dev); } 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_ICM20602: /* 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; } } /* * MPU9xxx magnetometer support requires to disable i2c auxiliary bus support. * 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. */ static int inv_mpu_magn_disable(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; 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; } 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) { 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; if (client->dev.of_node) { chip_type = (enum inv_devices) of_device_get_match_data(&client->dev); name = client->name; } else if (id) { chip_type = (enum inv_devices) id->driver_data; name = id->name; } else if (ACPI_HANDLE(&client->dev)) { name = inv_mpu_match_acpi_device(&client->dev, &chip_type); if (!name) return -ENODEV; } 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 %d\n", (int)PTR_ERR(regmap)); return PTR_ERR(regmap); } result = inv_mpu_core_probe(regmap, client->irq, name, inv_mpu_magn_disable, 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, inv_mpu6050_deselect_bypass); 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}, {"mpu9150", INV_MPU9150}, {"mpu9250", INV_MPU9250}, {"mpu9255", INV_MPU9255}, {"icm20608", INV_ICM20608}, {"icm20602", INV_ICM20602}, {} }; 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,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,icm20602", .data = (void *)INV_ICM20602 }, { } }; MODULE_DEVICE_TABLE(of, inv_of_match); static const struct acpi_device_id 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");