drivers/iio/magnetometer/st_magn_i2c.c

   1 /*
   2  * STMicroelectronics magnetometers driver
   3  *
   4  * Copyright 2012-2013 STMicroelectronics Inc.
   5  *
   6  * Denis Ciocca <denis.ciocca@st.com>
   7  *
   8  * Licensed under the GPL-2.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/i2c.h>
  15 #include <linux/iio/iio.h>
  16
  17 #include <linux/iio/common/st_sensors.h>
  18 #include <linux/iio/common/st_sensors_i2c.h>
  19 #include "st_magn.h"
  20
  21 static int st_magn_i2c_probe(struct i2c_client *client,
  22                                                 const struct i2c_device_id *id)
  23 {
  24         struct iio_dev *indio_dev;
  25         struct st_sensor_data *mdata;
  26         int err;
  27
  28         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  29         if (!indio_dev)
  30                 return -ENOMEM;
  31
  32         mdata = iio_priv(indio_dev);
  33         mdata->dev = &client->dev;
  34
  35         st_sensors_i2c_configure(indio_dev, client, mdata);
  36
  37         err = st_magn_common_probe(indio_dev, NULL);
  38         if (err < 0)
  39                 return err;
  40
  41         return 0;
  42 }
  43
  44 static int st_magn_i2c_remove(struct i2c_client *client)
  45 {
  46         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  47         st_magn_common_remove(indio_dev);
  48
  49         return 0;
  50 }
  51
  52 static const struct i2c_device_id st_magn_id_table[] = {
  53         { LSM303DLHC_MAGN_DEV_NAME },
  54         { LSM303DLM_MAGN_DEV_NAME },
  55         { LIS3MDL_MAGN_DEV_NAME },
  56         {},
  57 };
  58 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
  59
  60 static struct i2c_driver st_magn_driver = {
  61         .driver = {
  62                 .owner = THIS_MODULE,
  63                 .name = "st-magn-i2c",
  64         },
  65         .probe = st_magn_i2c_probe,
  66         .remove = st_magn_i2c_remove,
  67         .id_table = st_magn_id_table,
  68 };
  69 module_i2c_driver(st_magn_driver);
  70
  71 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  72 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
  73 MODULE_LICENSE("GPL v2");