drivers/iio/accel/st_accel_i2c.c

   1 /*
   2  * STMicroelectronics accelerometers 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/acpi.h>
  15 #include <linux/i2c.h>
  16 #include <linux/iio/iio.h>
  17
  18 #include <linux/iio/common/st_sensors.h>
  19 #include <linux/iio/common/st_sensors_i2c.h>
  20 #include "st_accel.h"
  21
  22 #ifdef CONFIG_OF
  23 static const struct of_device_id st_accel_of_match[] = {
  24         {
  25                 /* An older compatible */
  26                 .compatible = "st,lis3lv02d",
  27                 .data = LIS3LV02DL_ACCEL_DEV_NAME,
  28         },
  29         {
  30                 .compatible = "st,lis3lv02dl-accel",
  31                 .data = LIS3LV02DL_ACCEL_DEV_NAME,
  32         },
  33         {
  34                 .compatible = "st,lsm303dlh-accel",
  35                 .data = LSM303DLH_ACCEL_DEV_NAME,
  36         },
  37         {
  38                 .compatible = "st,lsm303dlhc-accel",
  39                 .data = LSM303DLHC_ACCEL_DEV_NAME,
  40         },
  41         {
  42                 .compatible = "st,lis3dh-accel",
  43                 .data = LIS3DH_ACCEL_DEV_NAME,
  44         },
  45         {
  46                 .compatible = "st,lsm330d-accel",
  47                 .data = LSM330D_ACCEL_DEV_NAME,
  48         },
  49         {
  50                 .compatible = "st,lsm330dl-accel",
  51                 .data = LSM330DL_ACCEL_DEV_NAME,
  52         },
  53         {
  54                 .compatible = "st,lsm330dlc-accel",
  55                 .data = LSM330DLC_ACCEL_DEV_NAME,
  56         },
  57         {
  58                 .compatible = "st,lis331dl-accel",
  59                 .data = LIS331DL_ACCEL_DEV_NAME,
  60         },
  61         {
  62                 .compatible = "st,lis331dlh-accel",
  63                 .data = LIS331DLH_ACCEL_DEV_NAME,
  64         },
  65         {
  66                 .compatible = "st,lsm303dl-accel",
  67                 .data = LSM303DL_ACCEL_DEV_NAME,
  68         },
  69         {
  70                 .compatible = "st,lsm303dlm-accel",
  71                 .data = LSM303DLM_ACCEL_DEV_NAME,
  72         },
  73         {
  74                 .compatible = "st,lsm330-accel",
  75                 .data = LSM330_ACCEL_DEV_NAME,
  76         },
  77         {
  78                 .compatible = "st,lsm303agr-accel",
  79                 .data = LSM303AGR_ACCEL_DEV_NAME,
  80         },
  81         {
  82                 .compatible = "st,lis2dh12-accel",
  83                 .data = LIS2DH12_ACCEL_DEV_NAME,
  84         },
  85         {
  86                 .compatible = "st,h3lis331dl-accel",
  87                 .data = H3LIS331DL_ACCEL_DEV_NAME,
  88         },
  89         {
  90                 .compatible = "st,lis3l02dq",
  91                 .data = LIS3L02DQ_ACCEL_DEV_NAME,
  92         },
  93         {
  94                 .compatible = "st,lng2dm-accel",
  95                 .data = LNG2DM_ACCEL_DEV_NAME,
  96         },
  97         {},
  98 };
  99 MODULE_DEVICE_TABLE(of, st_accel_of_match);
 100 #else
 101 #define st_accel_of_match NULL
 102 #endif
 103
 104 #ifdef CONFIG_ACPI
 105 static const struct acpi_device_id st_accel_acpi_match[] = {
 106         {"SMO8A90", LNG2DM},
 107         { },
 108 };
 109 MODULE_DEVICE_TABLE(acpi, st_accel_acpi_match);
 110 #else
 111 #define st_accel_acpi_match NULL
 112 #endif
 113
 114 static const struct i2c_device_id st_accel_id_table[] = {
 115         { LSM303DLH_ACCEL_DEV_NAME, LSM303DLH },
 116         { LSM303DLHC_ACCEL_DEV_NAME, LSM303DLHC },
 117         { LIS3DH_ACCEL_DEV_NAME, LIS3DH },
 118         { LSM330D_ACCEL_DEV_NAME, LSM330D },
 119         { LSM330DL_ACCEL_DEV_NAME, LSM330DL },
 120         { LSM330DLC_ACCEL_DEV_NAME, LSM330DLC },
 121         { LIS331DLH_ACCEL_DEV_NAME, LIS331DLH },
 122         { LSM303DL_ACCEL_DEV_NAME, LSM303DL },
 123         { LSM303DLM_ACCEL_DEV_NAME, LSM303DLM },
 124         { LSM330_ACCEL_DEV_NAME, LSM330 },
 125         { LSM303AGR_ACCEL_DEV_NAME, LSM303AGR },
 126         { LIS2DH12_ACCEL_DEV_NAME, LIS2DH12 },
 127         { LIS3L02DQ_ACCEL_DEV_NAME, LIS3L02DQ },
 128         { LNG2DM_ACCEL_DEV_NAME, LNG2DM },
 129         { H3LIS331DL_ACCEL_DEV_NAME, H3LIS331DL },
 130         { LIS331DL_ACCEL_DEV_NAME, LIS331DL },
 131         { LIS3LV02DL_ACCEL_DEV_NAME, LIS3LV02DL },
 132         {},
 133 };
 134 MODULE_DEVICE_TABLE(i2c, st_accel_id_table);
 135
 136 static int st_accel_i2c_probe(struct i2c_client *client,
 137                                                 const struct i2c_device_id *id)
 138 {
 139         struct iio_dev *indio_dev;
 140         struct st_sensor_data *adata;
 141         int ret;
 142
 143         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*adata));
 144         if (!indio_dev)
 145                 return -ENOMEM;
 146
 147         adata = iio_priv(indio_dev);
 148
 149         if (client->dev.of_node) {
 150                 st_sensors_of_name_probe(&client->dev, st_accel_of_match,
 151                                          client->name, sizeof(client->name));
 152         } else if (ACPI_HANDLE(&client->dev)) {
 153                 ret = st_sensors_match_acpi_device(&client->dev);
 154                 if ((ret < 0) || (ret >= ST_ACCEL_MAX))
 155                         return -ENODEV;
 156
 157                 strncpy(client->name, st_accel_id_table[ret].name,
 158                                 sizeof(client->name));
 159                 client->name[sizeof(client->name) - 1] = '\0';
 160         } else if (!id)
 161                 return -ENODEV;
 162
 163
 164         st_sensors_i2c_configure(indio_dev, client, adata);
 165
 166         ret = st_accel_common_probe(indio_dev);
 167         if (ret < 0)
 168                 return ret;
 169
 170         return 0;
 171 }
 172
 173 static int st_accel_i2c_remove(struct i2c_client *client)
 174 {
 175         st_accel_common_remove(i2c_get_clientdata(client));
 176
 177         return 0;
 178 }
 179
 180 static struct i2c_driver st_accel_driver = {
 181         .driver = {
 182                 .name = "st-accel-i2c",
 183                 .of_match_table = of_match_ptr(st_accel_of_match),
 184                 .acpi_match_table = ACPI_PTR(st_accel_acpi_match),
 185         },
 186         .probe = st_accel_i2c_probe,
 187         .remove = st_accel_i2c_remove,
 188         .id_table = st_accel_id_table,
 189 };
 190 module_i2c_driver(st_accel_driver);
 191
 192 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 193 MODULE_DESCRIPTION("STMicroelectronics accelerometers i2c driver");
 194 MODULE_LICENSE("GPL v2");