LXR linux/drivers/iio/magnetometer/st_magn

   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/mod_devicetable.h>
  13#include <linux/spi/spi.h>
  14#include <linux/iio/iio.h>
  15
  16#include <linux/iio/common/st_sensors.h>
  17#include <linux/iio/common/st_sensors_spi.h>
  18#include "st_magn.h"
  19
  20/*
  21 * For new single-chip sensors use <device_name> as compatible string.
  22 * For old single-chip devices keep <device_name>-magn to maintain
  23 * compatibility
  24 * For multi-chip devices, use <device_name>-magn to distinguish which
  25 * capability is being used
  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                .compatible = "st,lsm9ds1-magn",
  42                .data = LSM9DS1_MAGN_DEV_NAME,
  43        },
  44        {
  45                .compatible = "st,iis2mdc",
  46                .data = IIS2MDC_MAGN_DEV_NAME,
  47        },
  48        {}
  49};
  50MODULE_DEVICE_TABLE(of, st_magn_of_match);
  51
  52static int st_magn_spi_probe(struct spi_device *spi)
  53{
  54        const struct st_sensor_settings *settings;
  55        struct st_sensor_data *mdata;
  56        struct iio_dev *indio_dev;
  57        int err;
  58
  59        st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
  60
  61        settings = st_magn_get_settings(spi->modalias);
  62        if (!settings) {
  63                dev_err(&spi->dev, "device name %s not recognized.\n",
  64                        spi->modalias);
  65                return -ENODEV;
  66        }
  67
  68        indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
  69        if (!indio_dev)
  70                return -ENOMEM;
  71
  72        mdata = iio_priv(indio_dev);
  73        mdata->sensor_settings = (struct st_sensor_settings *)settings;
  74
  75        err = st_sensors_spi_configure(indio_dev, spi);
  76        if (err < 0)
  77                return err;
  78
  79        err = st_sensors_power_enable(indio_dev);
  80        if (err)
  81                return err;
  82
  83        err = st_magn_common_probe(indio_dev);
  84        if (err < 0)
  85                goto st_magn_power_off;
  86
  87        return 0;
  88
  89st_magn_power_off:
  90        st_sensors_power_disable(indio_dev);
  91
  92        return err;
  93}
  94
  95static int st_magn_spi_remove(struct spi_device *spi)
  96{
  97        struct iio_dev *indio_dev = spi_get_drvdata(spi);
  98
  99        st_sensors_power_disable(indio_dev);
 100
 101        st_magn_common_remove(indio_dev);
 102
 103        return 0;
 104}
 105
 106static const struct spi_device_id st_magn_id_table[] = {
 107        { LIS3MDL_MAGN_DEV_NAME },
 108        { LSM303AGR_MAGN_DEV_NAME },
 109        { LIS2MDL_MAGN_DEV_NAME },
 110        { LSM9DS1_MAGN_DEV_NAME },
 111        { IIS2MDC_MAGN_DEV_NAME },
 112        {},
 113};
 114MODULE_DEVICE_TABLE(spi, st_magn_id_table);
 115
 116static struct spi_driver st_magn_driver = {
 117        .driver = {
 118                .name = "st-magn-spi",
 119                .of_match_table = st_magn_of_match,
 120        },
 121        .probe = st_magn_spi_probe,
 122        .remove = st_magn_spi_remove,
 123        .id_table = st_magn_id_table,
 124};
 125module_spi_driver(st_magn_driver);
 126
 127MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 128MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
 129MODULE_LICENSE("GPL v2");
 130