drivers/iio/pressure/mpl115_i2c.c

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