linux/drivers/iio/pressure/mpl115_i2c.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Freescale MPL115A2 pressure/temperature sensor
   4 *
   5 * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
   6 *
   7 * (7-bit I2C slave address 0x60)
   8 *
   9 * Datasheet: http://www.nxp.com/files/sensors/doc/data_sheet/MPL115A2.pdf
  10 */
  11
  12#include <linux/module.h>
  13#include <linux/i2c.h>
  14
  15#include "mpl115.h"
  16
  17static int mpl115_i2c_init(struct device *dev)
  18{
  19        return 0;
  20}
  21
  22static int mpl115_i2c_read(struct device *dev, u8 address)
  23{
  24        return i2c_smbus_read_word_swapped(to_i2c_client(dev), address);
  25}
  26
  27static int mpl115_i2c_write(struct device *dev, u8 address, u8 value)
  28{
  29        return i2c_smbus_write_byte_data(to_i2c_client(dev), address, value);
  30}
  31
  32static const struct mpl115_ops mpl115_i2c_ops = {
  33        .init = mpl115_i2c_init,
  34        .read = mpl115_i2c_read,
  35        .write = mpl115_i2c_write,
  36};
  37
  38static int mpl115_i2c_probe(struct i2c_client *client,
  39                         const struct i2c_device_id *id)
  40{
  41        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
  42                return -EOPNOTSUPP;
  43
  44        return mpl115_probe(&client->dev, id->name, &mpl115_i2c_ops);
  45}
  46
  47static const struct i2c_device_id mpl115_i2c_id[] = {
  48        { "mpl115", 0 },
  49        { }
  50};
  51MODULE_DEVICE_TABLE(i2c, mpl115_i2c_id);
  52
  53static struct i2c_driver mpl115_i2c_driver = {
  54        .driver = {
  55                .name   = "mpl115",
  56        },
  57        .probe = mpl115_i2c_probe,
  58        .id_table = mpl115_i2c_id,
  59};
  60module_i2c_driver(mpl115_i2c_driver);
  61
  62MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
  63MODULE_DESCRIPTION("Freescale MPL115A2 pressure/temperature driver");
  64MODULE_LICENSE("GPL");
  65