drivers/iio/magnetometer/st_magn_spi.c

   1 /*
   2  * STMicroelectronics magnetometers 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/spi/spi.h>
  15 #include <linux/iio/iio.h>
  16
  17 #include <linux/iio/common/st_sensors.h>
  18 #include <linux/iio/common/st_sensors_spi.h>
  19 #include "st_magn.h"
  20
  21 static int st_magn_spi_probe(struct spi_device *spi)
  22 {
  23         struct iio_dev *indio_dev;
  24         struct st_sensor_data *mdata;
  25         int err;
  26
  27         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
  28         if (!indio_dev)
  29                 return -ENOMEM;
  30
  31         mdata = iio_priv(indio_dev);
  32         mdata->dev = &spi->dev;
  33
  34         st_sensors_spi_configure(indio_dev, spi, mdata);
  35
  36         err = st_magn_common_probe(indio_dev, NULL);
  37         if (err < 0)
  38                 return err;
  39
  40         return 0;
  41 }
  42
  43 static int st_magn_spi_remove(struct spi_device *spi)
  44 {
  45         struct iio_dev *indio_dev = spi_get_drvdata(spi);
  46         st_magn_common_remove(indio_dev);
  47
  48         return 0;
  49 }
  50
  51 static const struct spi_device_id st_magn_id_table[] = {
  52         { LSM303DLHC_MAGN_DEV_NAME },
  53         { LSM303DLM_MAGN_DEV_NAME },
  54         { LIS3MDL_MAGN_DEV_NAME },
  55         {},
  56 };
  57 MODULE_DEVICE_TABLE(spi, st_magn_id_table);
  58
  59 static struct spi_driver st_magn_driver = {
  60         .driver = {
  61                 .owner = THIS_MODULE,
  62                 .name = "st-magn-spi",
  63         },
  64         .probe = st_magn_spi_probe,
  65         .remove = st_magn_spi_remove,
  66         .id_table = st_magn_id_table,
  67 };
  68 module_spi_driver(st_magn_driver);
  69
  70 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  71 MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
  72 MODULE_LICENSE("GPL v2");