drivers/iio/magnetometer/st_magn_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics magnetometers driver
   4  *
   5  * Copyright 2012-2013 STMicroelectronics Inc.
   6  *
   7  * Denis Ciocca <denis.ciocca@st.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/i2c.h>
  14 #include <linux/iio/iio.h>
  15
  16 #include <linux/iio/common/st_sensors.h>
  17 #include <linux/iio/common/st_sensors_i2c.h>
  18 #include "st_magn.h"
  19
  20 #ifdef CONFIG_OF
  21 static const struct of_device_id st_magn_of_match[] = {
  22         {
  23                 .compatible = "st,lsm303dlh-magn",
  24                 .data = LSM303DLH_MAGN_DEV_NAME,
  25         },
  26         {
  27                 .compatible = "st,lsm303dlhc-magn",
  28                 .data = LSM303DLHC_MAGN_DEV_NAME,
  29         },
  30         {
  31                 .compatible = "st,lsm303dlm-magn",
  32                 .data = LSM303DLM_MAGN_DEV_NAME,
  33         },
  34         {
  35                 .compatible = "st,lis3mdl-magn",
  36                 .data = LIS3MDL_MAGN_DEV_NAME,
  37         },
  38         {
  39                 .compatible = "st,lsm303agr-magn",
  40                 .data = LSM303AGR_MAGN_DEV_NAME,
  41         },
  42         {
  43                 .compatible = "st,lis2mdl",
  44                 .data = LIS2MDL_MAGN_DEV_NAME,
  45         },
  46         {
  47                 .compatible = "st,lsm9ds1-magn",
  48                 .data = LSM9DS1_MAGN_DEV_NAME,
  49         },
  50         {},
  51 };
  52 MODULE_DEVICE_TABLE(of, st_magn_of_match);
  53 #else
  54 #define st_magn_of_match NULL
  55 #endif
  56
  57 static int st_magn_i2c_probe(struct i2c_client *client,
  58                                                 const struct i2c_device_id *id)
  59 {
  60         struct iio_dev *indio_dev;
  61         struct st_sensor_data *mdata;
  62         int err;
  63
  64         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  65         if (!indio_dev)
  66                 return -ENOMEM;
  67
  68         mdata = iio_priv(indio_dev);
  69         st_sensors_of_name_probe(&client->dev, st_magn_of_match,
  70                                  client->name, sizeof(client->name));
  71
  72         st_sensors_i2c_configure(indio_dev, client, mdata);
  73
  74         err = st_magn_common_probe(indio_dev);
  75         if (err < 0)
  76                 return err;
  77
  78         return 0;
  79 }
  80
  81 static int st_magn_i2c_remove(struct i2c_client *client)
  82 {
  83         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  84         st_magn_common_remove(indio_dev);
  85
  86         return 0;
  87 }
  88
  89 static const struct i2c_device_id st_magn_id_table[] = {
  90         { LSM303DLH_MAGN_DEV_NAME },
  91         { LSM303DLHC_MAGN_DEV_NAME },
  92         { LSM303DLM_MAGN_DEV_NAME },
  93         { LIS3MDL_MAGN_DEV_NAME },
  94         { LSM303AGR_MAGN_DEV_NAME },
  95         { LIS2MDL_MAGN_DEV_NAME },
  96         { LSM9DS1_MAGN_DEV_NAME },
  97         {},
  98 };
  99 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
 100
 101 static struct i2c_driver st_magn_driver = {
 102         .driver = {
 103                 .name = "st-magn-i2c",
 104                 .of_match_table = of_match_ptr(st_magn_of_match),
 105         },
 106         .probe = st_magn_i2c_probe,
 107         .remove = st_magn_i2c_remove,
 108         .id_table = st_magn_id_table,
 109 };
 110 module_i2c_driver(st_magn_driver);
 111
 112 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 113 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
 114 MODULE_LICENSE("GPL v2");