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                 .compatible = "st,iis2mdc",
  51                 .data = IIS2MDC_MAGN_DEV_NAME,
  52         },
  53         {},
  54 };
  55 MODULE_DEVICE_TABLE(of, st_magn_of_match);
  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_dev_name_probe(&client->dev, client->name, sizeof(client->name));
  66
  67         settings = st_magn_get_settings(client->name);
  68         if (!settings) {
  69                 dev_err(&client->dev, "device name %s not recognized.\n",
  70                         client->name);
  71                 return -ENODEV;
  72         }
  73
  74         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  75         if (!indio_dev)
  76                 return -ENOMEM;
  77
  78         mdata = iio_priv(indio_dev);
  79         mdata->sensor_settings = (struct st_sensor_settings *)settings;
  80
  81         err = st_sensors_i2c_configure(indio_dev, client);
  82         if (err < 0)
  83                 return err;
  84
  85         err = st_sensors_power_enable(indio_dev);
  86         if (err)
  87                 return err;
  88
  89         err = st_magn_common_probe(indio_dev);
  90         if (err < 0)
  91                 goto st_magn_power_off;
  92
  93         return 0;
  94
  95 st_magn_power_off:
  96         st_sensors_power_disable(indio_dev);
  97
  98         return err;
  99 }
 100
 101 static int st_magn_i2c_remove(struct i2c_client *client)
 102 {
 103         struct iio_dev *indio_dev = i2c_get_clientdata(client);
 104
 105         st_sensors_power_disable(indio_dev);
 106
 107         st_magn_common_remove(indio_dev);
 108
 109         return 0;
 110 }
 111
 112 static const struct i2c_device_id st_magn_id_table[] = {
 113         { LSM303DLH_MAGN_DEV_NAME },
 114         { LSM303DLHC_MAGN_DEV_NAME },
 115         { LSM303DLM_MAGN_DEV_NAME },
 116         { LIS3MDL_MAGN_DEV_NAME },
 117         { LSM303AGR_MAGN_DEV_NAME },
 118         { LIS2MDL_MAGN_DEV_NAME },
 119         { LSM9DS1_MAGN_DEV_NAME },
 120         { IIS2MDC_MAGN_DEV_NAME },
 121         {},
 122 };
 123 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
 124
 125 static struct i2c_driver st_magn_driver = {
 126         .driver = {
 127                 .name = "st-magn-i2c",
 128                 .of_match_table = st_magn_of_match,
 129         },
 130         .probe = st_magn_i2c_probe,
 131         .remove = st_magn_i2c_remove,
 132         .id_table = st_magn_id_table,
 133 };
 134 module_i2c_driver(st_magn_driver);
 135
 136 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 137 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
 138 MODULE_LICENSE("GPL v2");