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,lsm303dlh-magn",
  25                 .data = LSM303DLH_MAGN_DEV_NAME,
  26         },
  27         {
  28                 .compatible = "st,lsm303dlhc-magn",
  29                 .data = LSM303DLHC_MAGN_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lsm303dlm-magn",
  33                 .data = LSM303DLM_MAGN_DEV_NAME,
  34         },
  35         {
  36                 .compatible = "st,lis3mdl-magn",
  37                 .data = LIS3MDL_MAGN_DEV_NAME,
  38         },
  39         {
  40                 .compatible = "st,lsm303agr-magn",
  41                 .data = LSM303AGR_MAGN_DEV_NAME,
  42         },
  43         {
  44                 .compatible = "st,lis2mdl",
  45                 .data = LIS2MDL_MAGN_DEV_NAME,
  46         },
  47         {
  48                 .compatible = "st,lsm9ds1-magn",
  49                 .data = LSM9DS1_MAGN_DEV_NAME,
  50         },
  51         {},
  52 };
  53 MODULE_DEVICE_TABLE(of, st_magn_of_match);
  54 #else
  55 #define st_magn_of_match NULL
  56 #endif
  57
  58 static int st_magn_i2c_probe(struct i2c_client *client,
  59                                                 const struct i2c_device_id *id)
  60 {
  61         struct iio_dev *indio_dev;
  62         struct st_sensor_data *mdata;
  63         int err;
  64
  65         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  66         if (!indio_dev)
  67                 return -ENOMEM;
  68
  69         mdata = iio_priv(indio_dev);
  70         st_sensors_of_name_probe(&client->dev, st_magn_of_match,
  71                                  client->name, sizeof(client->name));
  72
  73         st_sensors_i2c_configure(indio_dev, client, mdata);
  74
  75         err = st_magn_common_probe(indio_dev);
  76         if (err < 0)
  77                 return err;
  78
  79         return 0;
  80 }
  81
  82 static int st_magn_i2c_remove(struct i2c_client *client)
  83 {
  84         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  85         st_magn_common_remove(indio_dev);
  86
  87         return 0;
  88 }
  89
  90 static const struct i2c_device_id st_magn_id_table[] = {
  91         { LSM303DLH_MAGN_DEV_NAME },
  92         { LSM303DLHC_MAGN_DEV_NAME },
  93         { LSM303DLM_MAGN_DEV_NAME },
  94         { LIS3MDL_MAGN_DEV_NAME },
  95         { LSM303AGR_MAGN_DEV_NAME },
  96         { LIS2MDL_MAGN_DEV_NAME },
  97         { LSM9DS1_MAGN_DEV_NAME },
  98         {},
  99 };
 100 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
 101
 102 static struct i2c_driver st_magn_driver = {
 103         .driver = {
 104                 .name = "st-magn-i2c",
 105                 .of_match_table = of_match_ptr(st_magn_of_match),
 106         },
 107         .probe = st_magn_i2c_probe,
 108         .remove = st_magn_i2c_remove,
 109         .id_table = st_magn_id_table,
 110 };
 111 module_i2c_driver(st_magn_driver);
 112
 113 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 114 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
 115 MODULE_LICENSE("GPL v2");