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         const struct st_sensor_settings *settings;
  61         struct st_sensor_data *mdata;
  62         struct iio_dev *indio_dev;
  63         int err;
  64
  65         st_sensors_of_name_probe(&client->dev, st_magn_of_match,
  66                                  client->name, sizeof(client->name));
  67
  68         settings = st_magn_get_settings(client->name);
  69         if (!settings) {
  70                 dev_err(&client->dev, "device name %s not recognized.\n",
  71                         client->name);
  72                 return -ENODEV;
  73         }
  74
  75         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  76         if (!indio_dev)
  77                 return -ENOMEM;
  78
  79         mdata = iio_priv(indio_dev);
  80         mdata->sensor_settings = (struct st_sensor_settings *)settings;
  81
  82         err = st_sensors_i2c_configure(indio_dev, client);
  83         if (err < 0)
  84                 return err;
  85
  86         err = st_magn_common_probe(indio_dev);
  87         if (err < 0)
  88                 return err;
  89
  90         return 0;
  91 }
  92
  93 static int st_magn_i2c_remove(struct i2c_client *client)
  94 {
  95         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  96         st_magn_common_remove(indio_dev);
  97
  98         return 0;
  99 }
 100
 101 static const struct i2c_device_id st_magn_id_table[] = {
 102         { LSM303DLH_MAGN_DEV_NAME },
 103         { LSM303DLHC_MAGN_DEV_NAME },
 104         { LSM303DLM_MAGN_DEV_NAME },
 105         { LIS3MDL_MAGN_DEV_NAME },
 106         { LSM303AGR_MAGN_DEV_NAME },
 107         { LIS2MDL_MAGN_DEV_NAME },
 108         { LSM9DS1_MAGN_DEV_NAME },
 109         {},
 110 };
 111 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
 112
 113 static struct i2c_driver st_magn_driver = {
 114         .driver = {
 115                 .name = "st-magn-i2c",
 116                 .of_match_table = of_match_ptr(st_magn_of_match),
 117         },
 118         .probe = st_magn_i2c_probe,
 119         .remove = st_magn_i2c_remove,
 120         .id_table = st_magn_id_table,
 121 };
 122 module_i2c_driver(st_magn_driver);
 123
 124 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 125 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
 126 MODULE_LICENSE("GPL v2");