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 #ifdef CONFIG_OF
  22 static const struct of_device_id st_magn_of_match[] = {
  23         {
  24                 .compatible = "st,lsm303dlhc-magn",
  25                 .data = LSM303DLHC_MAGN_DEV_NAME,
  26         },
  27         {
  28                 .compatible = "st,lsm303dlm-magn",
  29                 .data = LSM303DLM_MAGN_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lis3mdl-magn",
  33                 .data = LIS3MDL_MAGN_DEV_NAME,
  34         },
  35         {},
  36 };
  37 MODULE_DEVICE_TABLE(of, st_magn_of_match);
  38 #else
  39 #define st_magn_of_match NULL
  40 #endif
  41
  42 static int st_magn_i2c_probe(struct i2c_client *client,
  43                                                 const struct i2c_device_id *id)
  44 {
  45         struct iio_dev *indio_dev;
  46         struct st_sensor_data *mdata;
  47         int err;
  48
  49         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  50         if (!indio_dev)
  51                 return -ENOMEM;
  52
  53         mdata = iio_priv(indio_dev);
  54         mdata->dev = &client->dev;
  55         st_sensors_of_i2c_probe(client, st_magn_of_match);
  56
  57         st_sensors_i2c_configure(indio_dev, client, mdata);
  58
  59         err = st_magn_common_probe(indio_dev, NULL);
  60         if (err < 0)
  61                 return err;
  62
  63         return 0;
  64 }
  65
  66 static int st_magn_i2c_remove(struct i2c_client *client)
  67 {
  68         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  69         st_magn_common_remove(indio_dev);
  70
  71         return 0;
  72 }
  73
  74 static const struct i2c_device_id st_magn_id_table[] = {
  75         { LSM303DLHC_MAGN_DEV_NAME },
  76         { LSM303DLM_MAGN_DEV_NAME },
  77         { LIS3MDL_MAGN_DEV_NAME },
  78         {},
  79 };
  80 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
  81
  82 static struct i2c_driver st_magn_driver = {
  83         .driver = {
  84                 .owner = THIS_MODULE,
  85                 .name = "st-magn-i2c",
  86                 .of_match_table = of_match_ptr(st_magn_of_match),
  87         },
  88         .probe = st_magn_i2c_probe,
  89         .remove = st_magn_i2c_remove,
  90         .id_table = st_magn_id_table,
  91 };
  92 module_i2c_driver(st_magn_driver);
  93
  94 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  95 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
  96 MODULE_LICENSE("GPL v2");