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 static const struct of_device_id st_magn_of_match[] = {
  21         {
  22                 .compatible = "st,lsm303dlh-magn",
  23                 .data = LSM303DLH_MAGN_DEV_NAME,
  24         },
  25         {
  26                 .compatible = "st,lsm303dlhc-magn",
  27                 .data = LSM303DLHC_MAGN_DEV_NAME,
  28         },
  29         {
  30                 .compatible = "st,lsm303dlm-magn",
  31                 .data = LSM303DLM_MAGN_DEV_NAME,
  32         },
  33         {
  34                 .compatible = "st,lis3mdl-magn",
  35                 .data = LIS3MDL_MAGN_DEV_NAME,
  36         },
  37         {
  38                 .compatible = "st,lsm303agr-magn",
  39                 .data = LSM303AGR_MAGN_DEV_NAME,
  40         },
  41         {
  42                 .compatible = "st,lis2mdl",
  43                 .data = LIS2MDL_MAGN_DEV_NAME,
  44         },
  45         {
  46                 .compatible = "st,lsm9ds1-magn",
  47                 .data = LSM9DS1_MAGN_DEV_NAME,
  48         },
  49         {},
  50 };
  51 MODULE_DEVICE_TABLE(of, st_magn_of_match);
  52
  53 static int st_magn_i2c_probe(struct i2c_client *client,
  54                              const struct i2c_device_id *id)
  55 {
  56         const struct st_sensor_settings *settings;
  57         struct st_sensor_data *mdata;
  58         struct iio_dev *indio_dev;
  59         int err;
  60
  61         st_sensors_dev_name_probe(&client->dev, client->name, sizeof(client->name));
  62
  63         settings = st_magn_get_settings(client->name);
  64         if (!settings) {
  65                 dev_err(&client->dev, "device name %s not recognized.\n",
  66                         client->name);
  67                 return -ENODEV;
  68         }
  69
  70         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  71         if (!indio_dev)
  72                 return -ENOMEM;
  73
  74         mdata = iio_priv(indio_dev);
  75         mdata->sensor_settings = (struct st_sensor_settings *)settings;
  76
  77         err = st_sensors_i2c_configure(indio_dev, client);
  78         if (err < 0)
  79                 return err;
  80
  81         err = st_magn_common_probe(indio_dev);
  82         if (err < 0)
  83                 return err;
  84
  85         return 0;
  86 }
  87
  88 static int st_magn_i2c_remove(struct i2c_client *client)
  89 {
  90         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  91         st_magn_common_remove(indio_dev);
  92
  93         return 0;
  94 }
  95
  96 static const struct i2c_device_id st_magn_id_table[] = {
  97         { LSM303DLH_MAGN_DEV_NAME },
  98         { LSM303DLHC_MAGN_DEV_NAME },
  99         { LSM303DLM_MAGN_DEV_NAME },
 100         { LIS3MDL_MAGN_DEV_NAME },
 101         { LSM303AGR_MAGN_DEV_NAME },
 102         { LIS2MDL_MAGN_DEV_NAME },
 103         { LSM9DS1_MAGN_DEV_NAME },
 104         {},
 105 };
 106 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
 107
 108 static struct i2c_driver st_magn_driver = {
 109         .driver = {
 110                 .name = "st-magn-i2c",
 111                 .of_match_table = st_magn_of_match,
 112         },
 113         .probe = st_magn_i2c_probe,
 114         .remove = st_magn_i2c_remove,
 115         .id_table = st_magn_id_table,
 116 };
 117 module_i2c_driver(st_magn_driver);
 118
 119 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 120 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
 121 MODULE_LICENSE("GPL v2");