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 = iio_device_alloc(sizeof(*mdata));
  29         if (indio_dev == NULL) {
  30                 err = -ENOMEM;
  31                 goto iio_device_alloc_error;
  32         }
  33
  34         mdata = iio_priv(indio_dev);
  35         mdata->dev = &client->dev;
  36
  37         st_sensors_i2c_configure(indio_dev, client, mdata);
  38
  39         err = st_magn_common_probe(indio_dev);
  40         if (err < 0)
  41                 goto st_magn_common_probe_error;
  42
  43         return 0;
  44
  45 st_magn_common_probe_error:
  46         iio_device_free(indio_dev);
  47 iio_device_alloc_error:
  48         return err;
  49 }
  50
  51 static int st_magn_i2c_remove(struct i2c_client *client)
  52 {
  53         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  54         st_magn_common_remove(indio_dev);
  55
  56         return 0;
  57 }
  58
  59 static const struct i2c_device_id st_magn_id_table[] = {
  60         { LSM303DLHC_MAGN_DEV_NAME },
  61         { LSM303DLM_MAGN_DEV_NAME },
  62         { LIS3MDL_MAGN_DEV_NAME },
  63         {},
  64 };
  65 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
  66
  67 static struct i2c_driver st_magn_driver = {
  68         .driver = {
  69                 .owner = THIS_MODULE,
  70                 .name = "st-magn-i2c",
  71         },
  72         .probe = st_magn_i2c_probe,
  73         .remove = st_magn_i2c_remove,
  74         .id_table = st_magn_id_table,
  75 };
  76 module_i2c_driver(st_magn_driver);
  77
  78 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  79 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
  80 MODULE_LICENSE("GPL v2");