Orange Pi5 kernel

// 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},
<------>{"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,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 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");