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// 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");
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