LXR linux/drivers/iio/magnetometer/st_magn

   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#ifdef CONFIG_OF
  22/*
  23 * For new single-chip sensors use <device_name> as compatible string.
  24 * For old single-chip devices keep <device_name>-magn to maintain
  25 * compatibility
  26 */
  27static const struct of_device_id st_magn_of_match[] = {
  28        {
  29                .compatible = "st,lis3mdl-magn",
  30                .data = LIS3MDL_MAGN_DEV_NAME,
  31        },
  32        {
  33                .compatible = "st,lsm303agr-magn",
  34                .data = LSM303AGR_MAGN_DEV_NAME,
  35        },
  36        {
  37                .compatible = "st,lis2mdl",
  38                .data = LIS2MDL_MAGN_DEV_NAME,
  39        },
  40        {}
  41};
  42MODULE_DEVICE_TABLE(of, st_magn_of_match);
  43#else
  44#define st_magn_of_match        NULL
  45#endif
  46
  47static int st_magn_spi_probe(struct spi_device *spi)
  48{
  49        struct iio_dev *indio_dev;
  50        struct st_sensor_data *mdata;
  51        int err;
  52
  53        indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
  54        if (!indio_dev)
  55                return -ENOMEM;
  56
  57        mdata = iio_priv(indio_dev);
  58
  59        st_sensors_of_name_probe(&spi->dev, st_magn_of_match,
  60                                 spi->modalias, sizeof(spi->modalias));
  61        st_sensors_spi_configure(indio_dev, spi, mdata);
  62
  63        err = st_magn_common_probe(indio_dev);
  64        if (err < 0)
  65                return err;
  66
  67        return 0;
  68}
  69
  70static int st_magn_spi_remove(struct spi_device *spi)
  71{
  72        struct iio_dev *indio_dev = spi_get_drvdata(spi);
  73        st_magn_common_remove(indio_dev);
  74
  75        return 0;
  76}
  77
  78static const struct spi_device_id st_magn_id_table[] = {
  79        { LIS3MDL_MAGN_DEV_NAME },
  80        { LSM303AGR_MAGN_DEV_NAME },
  81        { LIS2MDL_MAGN_DEV_NAME },
  82        {},
  83};
  84MODULE_DEVICE_TABLE(spi, st_magn_id_table);
  85
  86static struct spi_driver st_magn_driver = {
  87        .driver = {
  88                .name = "st-magn-spi",
  89                .of_match_table = of_match_ptr(st_magn_of_match),
  90        },
  91        .probe = st_magn_spi_probe,
  92        .remove = st_magn_spi_remove,
  93        .id_table = st_magn_id_table,
  94};
  95module_spi_driver(st_magn_driver);
  96
  97MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  98MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
  99MODULE_LICENSE("GPL v2");
 100