drivers/iio/pressure/st_pressure_spi.c

   1 /*
   2  * STMicroelectronics pressures driver
   3  *
   4  * Copyright 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_pressure.h"
  20
  21 static int st_press_spi_probe(struct spi_device *spi)
  22 {
  23         struct iio_dev *indio_dev;
  24         struct st_sensor_data *pdata;
  25         int err;
  26
  27         indio_dev = iio_device_alloc(sizeof(*pdata));
  28         if (indio_dev == NULL) {
  29                 err = -ENOMEM;
  30                 goto iio_device_alloc_error;
  31         }
  32
  33         pdata = iio_priv(indio_dev);
  34         pdata->dev = &spi->dev;
  35
  36         st_sensors_spi_configure(indio_dev, spi, pdata);
  37
  38         err = st_press_common_probe(indio_dev);
  39         if (err < 0)
  40                 goto st_press_common_probe_error;
  41
  42         return 0;
  43
  44 st_press_common_probe_error:
  45         iio_device_free(indio_dev);
  46 iio_device_alloc_error:
  47         return err;
  48 }
  49
  50 static int st_press_spi_remove(struct spi_device *spi)
  51 {
  52         st_press_common_remove(spi_get_drvdata(spi));
  53
  54         return 0;
  55 }
  56
  57 static const struct spi_device_id st_press_id_table[] = {
  58         { LPS331AP_PRESS_DEV_NAME },
  59         {},
  60 };
  61 MODULE_DEVICE_TABLE(spi, st_press_id_table);
  62
  63 static struct spi_driver st_press_driver = {
  64         .driver = {
  65                 .owner = THIS_MODULE,
  66                 .name = "st-press-spi",
  67         },
  68         .probe = st_press_spi_probe,
  69         .remove = st_press_spi_remove,
  70         .id_table = st_press_id_table,
  71 };
  72 module_spi_driver(st_press_driver);
  73
  74 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  75 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
  76 MODULE_LICENSE("GPL v2");