drivers/iio/pressure/mpl115_i2c.c

Source file repositories/reference/linux-study-clean/drivers/iio/pressure/mpl115_i2c.c

File Facts

System
Linux kernel
Corpus path
drivers/iio/pressure/mpl115_i2c.c
Extension
.c
Size
1621 bytes
Lines
67
Domain
Driver Families
Bucket
drivers/iio
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Freescale MPL115A2 pressure/temperature sensor
 *
 * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
 *
 * (7-bit I2C slave address 0x60)
 *
 * Datasheet: http://www.nxp.com/files/sensors/doc/data_sheet/MPL115A2.pdf
 */

#include <linux/module.h>
#include <linux/i2c.h>

#include "mpl115.h"

static int mpl115_i2c_init(struct device *dev)
{
	return 0;
}

static int mpl115_i2c_read(struct device *dev, u8 address)
{
	return i2c_smbus_read_word_swapped(to_i2c_client(dev), address);
}

static int mpl115_i2c_write(struct device *dev, u8 address, u8 value)
{
	return i2c_smbus_write_byte_data(to_i2c_client(dev), address, value);
}

static const struct mpl115_ops mpl115_i2c_ops = {
	.init = mpl115_i2c_init,
	.read = mpl115_i2c_read,
	.write = mpl115_i2c_write,
};

static int mpl115_i2c_probe(struct i2c_client *client)
{
	const struct i2c_device_id *id = i2c_client_get_device_id(client);
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
		return -EOPNOTSUPP;

	return mpl115_probe(&client->dev, id->name, &mpl115_i2c_ops);
}

static const struct i2c_device_id mpl115_i2c_id[] = {
	{ "mpl115" },
	{ }
};
MODULE_DEVICE_TABLE(i2c, mpl115_i2c_id);

static struct i2c_driver mpl115_i2c_driver = {
	.driver = {
		.name	= "mpl115",
		.pm = pm_ptr(&mpl115_dev_pm_ops),
	},
	.probe = mpl115_i2c_probe,
	.id_table = mpl115_i2c_id,
};
module_i2c_driver(mpl115_i2c_driver);

MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
MODULE_DESCRIPTION("Freescale MPL115A2 pressure/temperature driver");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("IIO_MPL115");

Annotation

Implementation Notes