drivers/iio/gyro/st_gyro_spi.c

   1 /*
   2  * STMicroelectronics gyroscopes 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_gyro.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>-gyro to maintain
  25  * compatibility
  26  */
  27 static const struct of_device_id st_gyro_of_match[] = {
  28         {
  29                 .compatible = "st,l3g4200d-gyro",
  30                 .data = L3G4200D_GYRO_DEV_NAME,
  31         },
  32         {
  33                 .compatible = "st,lsm330d-gyro",
  34                 .data = LSM330D_GYRO_DEV_NAME,
  35         },
  36         {
  37                 .compatible = "st,lsm330dl-gyro",
  38                 .data = LSM330DL_GYRO_DEV_NAME,
  39         },
  40         {
  41                 .compatible = "st,lsm330dlc-gyro",
  42                 .data = LSM330DLC_GYRO_DEV_NAME,
  43         },
  44         {
  45                 .compatible = "st,l3gd20-gyro",
  46                 .data = L3GD20_GYRO_DEV_NAME,
  47         },
  48         {
  49                 .compatible = "st,l3gd20h-gyro",
  50                 .data = L3GD20H_GYRO_DEV_NAME,
  51         },
  52         {
  53                 .compatible = "st,l3g4is-gyro",
  54                 .data = L3G4IS_GYRO_DEV_NAME,
  55         },
  56         {
  57                 .compatible = "st,lsm330-gyro",
  58                 .data = LSM330_GYRO_DEV_NAME,
  59         },
  60         {
  61                 .compatible = "st,lsm9ds0-gyro",
  62                 .data = LSM9DS0_GYRO_DEV_NAME,
  63         },
  64         {},
  65 };
  66 MODULE_DEVICE_TABLE(of, st_gyro_of_match);
  67 #else
  68 #define st_gyro_of_match        NULL
  69 #endif
  70
  71 static int st_gyro_spi_probe(struct spi_device *spi)
  72 {
  73         struct iio_dev *indio_dev;
  74         struct st_sensor_data *gdata;
  75         int err;
  76
  77         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*gdata));
  78         if (!indio_dev)
  79                 return -ENOMEM;
  80
  81         gdata = iio_priv(indio_dev);
  82
  83         st_sensors_of_name_probe(&spi->dev, st_gyro_of_match,
  84                                  spi->modalias, sizeof(spi->modalias));
  85         st_sensors_spi_configure(indio_dev, spi, gdata);
  86
  87         err = st_gyro_common_probe(indio_dev);
  88         if (err < 0)
  89                 return err;
  90
  91         return 0;
  92 }
  93
  94 static int st_gyro_spi_remove(struct spi_device *spi)
  95 {
  96         st_gyro_common_remove(spi_get_drvdata(spi));
  97
  98         return 0;
  99 }
 100
 101 static const struct spi_device_id st_gyro_id_table[] = {
 102         { L3G4200D_GYRO_DEV_NAME },
 103         { LSM330D_GYRO_DEV_NAME },
 104         { LSM330DL_GYRO_DEV_NAME },
 105         { LSM330DLC_GYRO_DEV_NAME },
 106         { L3GD20_GYRO_DEV_NAME },
 107         { L3GD20H_GYRO_DEV_NAME },
 108         { L3G4IS_GYRO_DEV_NAME },
 109         { LSM330_GYRO_DEV_NAME },
 110         { LSM9DS0_GYRO_DEV_NAME },
 111         {},
 112 };
 113 MODULE_DEVICE_TABLE(spi, st_gyro_id_table);
 114
 115 static struct spi_driver st_gyro_driver = {
 116         .driver = {
 117                 .name = "st-gyro-spi",
 118                 .of_match_table = of_match_ptr(st_gyro_of_match),
 119         },
 120         .probe = st_gyro_spi_probe,
 121         .remove = st_gyro_spi_remove,
 122         .id_table = st_gyro_id_table,
 123 };
 124 module_spi_driver(st_gyro_driver);
 125
 126 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 127 MODULE_DESCRIPTION("STMicroelectronics gyroscopes spi driver");
 128 MODULE_LICENSE("GPL v2");