// SPDX-License-Identifier: GPL-2.0-only
|
#include <linux/err.h>
|
#include <linux/i2c.h>
|
#include <linux/i2c-mux.h>
|
#include <linux/iio/iio.h>
|
#include <linux/module.h>
|
#include <linux/regmap.h>
|
#include <linux/pm_runtime.h>
|
|
#include "mpu3050.h"
|
|
static const struct regmap_config mpu3050_i2c_regmap_config = {
|
.reg_bits = 8,
|
.val_bits = 8,
|
};
|
|
static int mpu3050_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
|
{
|
struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
|
|
/* Just power up the device, that is all that is needed */
|
pm_runtime_get_sync(mpu3050->dev);
|
return 0;
|
}
|
|
static int mpu3050_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
|
{
|
struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
|
|
pm_runtime_mark_last_busy(mpu3050->dev);
|
pm_runtime_put_autosuspend(mpu3050->dev);
|
return 0;
|
}
|
|
static int mpu3050_i2c_probe(struct i2c_client *client,
|
const struct i2c_device_id *id)
|
{
|
struct regmap *regmap;
|
const char *name;
|
struct mpu3050 *mpu3050;
|
int ret;
|
|
if (!i2c_check_functionality(client->adapter,
|
I2C_FUNC_SMBUS_I2C_BLOCK))
|
return -EOPNOTSUPP;
|
|
if (id)
|
name = id->name;
|
else
|
return -ENODEV;
|
|
regmap = devm_regmap_init_i2c(client, &mpu3050_i2c_regmap_config);
|
if (IS_ERR(regmap)) {
|
dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
|
regmap);
|
return PTR_ERR(regmap);
|
}
|
|
ret = mpu3050_common_probe(&client->dev, regmap, client->irq, name);
|
if (ret)
|
return ret;
|
|
/* The main driver is up, now register the I2C mux */
|
mpu3050 = iio_priv(dev_get_drvdata(&client->dev));
|
mpu3050->i2cmux = i2c_mux_alloc(client->adapter, &client->dev,
|
1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
|
mpu3050_i2c_bypass_select,
|
mpu3050_i2c_bypass_deselect);
|
/* Just fail the mux, there is no point in killing the driver */
|
if (!mpu3050->i2cmux)
|
dev_err(&client->dev, "failed to allocate I2C mux\n");
|
else {
|
mpu3050->i2cmux->priv = mpu3050;
|
/* Ignore failure, not critical */
|
i2c_mux_add_adapter(mpu3050->i2cmux, 0, 0, 0);
|
}
|
|
return 0;
|
}
|
|
static int mpu3050_i2c_remove(struct i2c_client *client)
|
{
|
struct iio_dev *indio_dev = dev_get_drvdata(&client->dev);
|
struct mpu3050 *mpu3050 = iio_priv(indio_dev);
|
|
if (mpu3050->i2cmux)
|
i2c_mux_del_adapters(mpu3050->i2cmux);
|
|
return mpu3050_common_remove(&client->dev);
|
}
|
|
/*
|
* device id table is used to identify what device can be
|
* supported by this driver
|
*/
|
static const struct i2c_device_id mpu3050_i2c_id[] = {
|
{ "mpu3050" },
|
{}
|
};
|
MODULE_DEVICE_TABLE(i2c, mpu3050_i2c_id);
|
|
static const struct of_device_id mpu3050_i2c_of_match[] = {
|
{ .compatible = "invensense,mpu3050", .data = "mpu3050" },
|
/* Deprecated vendor ID from the Input driver */
|
{ .compatible = "invn,mpu3050", .data = "mpu3050" },
|
{ },
|
};
|
MODULE_DEVICE_TABLE(of, mpu3050_i2c_of_match);
|
|
static struct i2c_driver mpu3050_i2c_driver = {
|
.probe = mpu3050_i2c_probe,
|
.remove = mpu3050_i2c_remove,
|
.id_table = mpu3050_i2c_id,
|
.driver = {
|
.of_match_table = mpu3050_i2c_of_match,
|
.name = "mpu3050-i2c",
|
.pm = &mpu3050_dev_pm_ops,
|
},
|
};
|
module_i2c_driver(mpu3050_i2c_driver);
|
|
MODULE_AUTHOR("Linus Walleij");
|
MODULE_DESCRIPTION("Invensense MPU3050 gyroscope driver");
|
MODULE_LICENSE("GPL");
|
