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#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 %d\n",
(int)PTR_ERR(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");
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