root/drivers/iio/pressure/mpl115_i2c.c

DEFINITIONS

1. mpl115_i2c_init
2. mpl115_i2c_read
3. mpl115_i2c_write
4. mpl115_i2c_probe

   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 
  17 static int mpl115_i2c_init(struct device *dev)
  18 {
  19         return 0;
  20 }
  21 
  22 static int mpl115_i2c_read(struct device *dev, u8 address)
  23 {
  24         return i2c_smbus_read_word_swapped(to_i2c_client(dev), address);
  25 }
  26 
  27 static 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 
  32 static const struct mpl115_ops mpl115_i2c_ops = {
  33         .init = mpl115_i2c_init,
  34         .read = mpl115_i2c_read,
  35         .write = mpl115_i2c_write,
  36 };
  37 
  38 static 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 
  47 static const struct i2c_device_id mpl115_i2c_id[] = {
  48         { "mpl115", 0 },
  49         { }
  50 };
  51 MODULE_DEVICE_TABLE(i2c, mpl115_i2c_id);
  52 
  53 static struct i2c_driver mpl115_i2c_driver = {
  54         .driver = {
  55                 .name   = "mpl115",
  56         },
  57         .probe = mpl115_i2c_probe,
  58         .id_table = mpl115_i2c_id,
  59 };
  60 module_i2c_driver(mpl115_i2c_driver);
  61 
  62 MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
  63 MODULE_DESCRIPTION("Freescale MPL115A2 pressure/temperature driver");
  64 MODULE_LICENSE("GPL");