drivers/iio/gyro/st_gyro_spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics gyroscopes 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/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_gyro.h"
  19
  20 #ifdef CONFIG_OF
  21 /*
  22  * For new single-chip sensors use <device_name> as compatible string.
  23  * For old single-chip devices keep <device_name>-gyro to maintain
  24  * compatibility
  25  */
  26 static const struct of_device_id st_gyro_of_match[] = {
  27         {
  28                 .compatible = "st,l3g4200d-gyro",
  29                 .data = L3G4200D_GYRO_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lsm330d-gyro",
  33                 .data = LSM330D_GYRO_DEV_NAME,
  34         },
  35         {
  36                 .compatible = "st,lsm330dl-gyro",
  37                 .data = LSM330DL_GYRO_DEV_NAME,
  38         },
  39         {
  40                 .compatible = "st,lsm330dlc-gyro",
  41                 .data = LSM330DLC_GYRO_DEV_NAME,
  42         },
  43         {
  44                 .compatible = "st,l3gd20-gyro",
  45                 .data = L3GD20_GYRO_DEV_NAME,
  46         },
  47         {
  48                 .compatible = "st,l3gd20h-gyro",
  49                 .data = L3GD20H_GYRO_DEV_NAME,
  50         },
  51         {
  52                 .compatible = "st,l3g4is-gyro",
  53                 .data = L3G4IS_GYRO_DEV_NAME,
  54         },
  55         {
  56                 .compatible = "st,lsm330-gyro",
  57                 .data = LSM330_GYRO_DEV_NAME,
  58         },
  59         {
  60                 .compatible = "st,lsm9ds0-gyro",
  61                 .data = LSM9DS0_GYRO_DEV_NAME,
  62         },
  63         {},
  64 };
  65 MODULE_DEVICE_TABLE(of, st_gyro_of_match);
  66 #else
  67 #define st_gyro_of_match        NULL
  68 #endif
  69
  70 static int st_gyro_spi_probe(struct spi_device *spi)
  71 {
  72         const struct st_sensor_settings *settings;
  73         struct st_sensor_data *gdata;
  74         struct iio_dev *indio_dev;
  75         int err;
  76
  77         st_sensors_of_name_probe(&spi->dev, st_gyro_of_match,
  78                                  spi->modalias, sizeof(spi->modalias));
  79
  80         settings = st_gyro_get_settings(spi->modalias);
  81         if (!settings) {
  82                 dev_err(&spi->dev, "device name %s not recognized.\n",
  83                         spi->modalias);
  84                 return -ENODEV;
  85         }
  86
  87         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*gdata));
  88         if (!indio_dev)
  89                 return -ENOMEM;
  90
  91         gdata = iio_priv(indio_dev);
  92         gdata->sensor_settings = (struct st_sensor_settings *)settings;
  93
  94         err = st_sensors_spi_configure(indio_dev, spi);
  95         if (err < 0)
  96                 return err;
  97
  98         err = st_gyro_common_probe(indio_dev);
  99         if (err < 0)
 100                 return err;
 101
 102         return 0;
 103 }
 104
 105 static int st_gyro_spi_remove(struct spi_device *spi)
 106 {
 107         st_gyro_common_remove(spi_get_drvdata(spi));
 108
 109         return 0;
 110 }
 111
 112 static const struct spi_device_id st_gyro_id_table[] = {
 113         { L3G4200D_GYRO_DEV_NAME },
 114         { LSM330D_GYRO_DEV_NAME },
 115         { LSM330DL_GYRO_DEV_NAME },
 116         { LSM330DLC_GYRO_DEV_NAME },
 117         { L3GD20_GYRO_DEV_NAME },
 118         { L3GD20H_GYRO_DEV_NAME },
 119         { L3G4IS_GYRO_DEV_NAME },
 120         { LSM330_GYRO_DEV_NAME },
 121         { LSM9DS0_GYRO_DEV_NAME },
 122         {},
 123 };
 124 MODULE_DEVICE_TABLE(spi, st_gyro_id_table);
 125
 126 static struct spi_driver st_gyro_driver = {
 127         .driver = {
 128                 .name = "st-gyro-spi",
 129                 .of_match_table = of_match_ptr(st_gyro_of_match),
 130         },
 131         .probe = st_gyro_spi_probe,
 132         .remove = st_gyro_spi_remove,
 133         .id_table = st_gyro_id_table,
 134 };
 135 module_spi_driver(st_gyro_driver);
 136
 137 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 138 MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver");
 139 MODULE_LICENSE("GPL v2");