drivers/iio/accel/st_accel_spi.c

   1 /*
   2  * STMicroelectronics accelerometers 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_accel.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>-accel to maintain
  25  * compatibility
  26  */
  27 static const struct of_device_id st_accel_of_match[] = {
  28         {
  29                 /* An older compatible */
  30                 .compatible = "st,lis302dl-spi",
  31                 .data = LIS3LV02DL_ACCEL_DEV_NAME,
  32         },
  33         {
  34                 .compatible = "st,lis3lv02dl-accel",
  35                 .data = LIS3LV02DL_ACCEL_DEV_NAME,
  36         },
  37         {
  38                 .compatible = "st,lis3dh-accel",
  39                 .data = LIS3DH_ACCEL_DEV_NAME,
  40         },
  41         {
  42                 .compatible = "st,lsm330d-accel",
  43                 .data = LSM330D_ACCEL_DEV_NAME,
  44         },
  45         {
  46                 .compatible = "st,lsm330dl-accel",
  47                 .data = LSM330DL_ACCEL_DEV_NAME,
  48         },
  49         {
  50                 .compatible = "st,lsm330dlc-accel",
  51                 .data = LSM330DLC_ACCEL_DEV_NAME,
  52         },
  53         {
  54                 .compatible = "st,lis331dlh-accel",
  55                 .data = LIS331DLH_ACCEL_DEV_NAME,
  56         },
  57         {
  58                 .compatible = "st,lsm330-accel",
  59                 .data = LSM330_ACCEL_DEV_NAME,
  60         },
  61         {
  62                 .compatible = "st,lsm303agr-accel",
  63                 .data = LSM303AGR_ACCEL_DEV_NAME,
  64         },
  65         {
  66                 .compatible = "st,lis2dh12-accel",
  67                 .data = LIS2DH12_ACCEL_DEV_NAME,
  68         },
  69         {
  70                 .compatible = "st,lis3l02dq",
  71                 .data = LIS3L02DQ_ACCEL_DEV_NAME,
  72         },
  73         {
  74                 .compatible = "st,lng2dm-accel",
  75                 .data = LNG2DM_ACCEL_DEV_NAME,
  76         },
  77         {
  78                 .compatible = "st,h3lis331dl-accel",
  79                 .data = H3LIS331DL_ACCEL_DEV_NAME,
  80         },
  81         {
  82                 .compatible = "st,lis331dl-accel",
  83                 .data = LIS331DL_ACCEL_DEV_NAME,
  84         },
  85         {}
  86 };
  87 MODULE_DEVICE_TABLE(of, st_accel_of_match);
  88 #else
  89 #define st_accel_of_match       NULL
  90 #endif
  91
  92 static int st_accel_spi_probe(struct spi_device *spi)
  93 {
  94         struct iio_dev *indio_dev;
  95         struct st_sensor_data *adata;
  96         int err;
  97
  98         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adata));
  99         if (!indio_dev)
 100                 return -ENOMEM;
 101
 102         adata = iio_priv(indio_dev);
 103
 104         st_sensors_of_name_probe(&spi->dev, st_accel_of_match,
 105                                  spi->modalias, sizeof(spi->modalias));
 106         st_sensors_spi_configure(indio_dev, spi, adata);
 107
 108         err = st_accel_common_probe(indio_dev);
 109         if (err < 0)
 110                 return err;
 111
 112         return 0;
 113 }
 114
 115 static int st_accel_spi_remove(struct spi_device *spi)
 116 {
 117         st_accel_common_remove(spi_get_drvdata(spi));
 118
 119         return 0;
 120 }
 121
 122 static const struct spi_device_id st_accel_id_table[] = {
 123         { LIS3DH_ACCEL_DEV_NAME },
 124         { LSM330D_ACCEL_DEV_NAME },
 125         { LSM330DL_ACCEL_DEV_NAME },
 126         { LSM330DLC_ACCEL_DEV_NAME },
 127         { LIS331DLH_ACCEL_DEV_NAME },
 128         { LSM330_ACCEL_DEV_NAME },
 129         { LSM303AGR_ACCEL_DEV_NAME },
 130         { LIS2DH12_ACCEL_DEV_NAME },
 131         { LIS3L02DQ_ACCEL_DEV_NAME },
 132         { LNG2DM_ACCEL_DEV_NAME },
 133         { H3LIS331DL_ACCEL_DEV_NAME },
 134         { LIS331DL_ACCEL_DEV_NAME },
 135         { LIS3LV02DL_ACCEL_DEV_NAME },
 136         {},
 137 };
 138 MODULE_DEVICE_TABLE(spi, st_accel_id_table);
 139
 140 static struct spi_driver st_accel_driver = {
 141         .driver = {
 142                 .name = "st-accel-spi",
 143                 .of_match_table = of_match_ptr(st_accel_of_match),
 144         },
 145         .probe = st_accel_spi_probe,
 146         .remove = st_accel_spi_remove,
 147         .id_table = st_accel_id_table,
 148 };
 149 module_spi_driver(st_accel_driver);
 150
 151 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 152 MODULE_DESCRIPTION("STMicroelectronics accelerometers spi driver");
 153 MODULE_LICENSE("GPL v2");