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 #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>-press to maintain
  25  * compatibility
  26  */
  27 static const struct of_device_id st_press_of_match[] = {
  28         {
  29                 .compatible = "st,lps001wp-press",
  30                 .data = LPS001WP_PRESS_DEV_NAME,
  31         },
  32         {
  33                 .compatible = "st,lps25h-press",
  34                 .data = LPS25H_PRESS_DEV_NAME,
  35         },
  36         {
  37                 .compatible = "st,lps331ap-press",
  38                 .data = LPS331AP_PRESS_DEV_NAME,
  39         },
  40         {
  41                 .compatible = "st,lps22hb-press",
  42                 .data = LPS22HB_PRESS_DEV_NAME,
  43         },
  44         {},
  45 };
  46 MODULE_DEVICE_TABLE(of, st_press_of_match);
  47 #else
  48 #define st_press_of_match       NULL
  49 #endif
  50
  51 static int st_press_spi_probe(struct spi_device *spi)
  52 {
  53         struct iio_dev *indio_dev;
  54         struct st_sensor_data *press_data;
  55         int err;
  56
  57         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  58         if (indio_dev == NULL)
  59                 return -ENOMEM;
  60
  61         press_data = iio_priv(indio_dev);
  62
  63         st_sensors_of_name_probe(&spi->dev, st_press_of_match,
  64                                  spi->modalias, sizeof(spi->modalias));
  65         st_sensors_spi_configure(indio_dev, spi, press_data);
  66
  67         err = st_press_common_probe(indio_dev);
  68         if (err < 0)
  69                 return err;
  70
  71         return 0;
  72 }
  73
  74 static int st_press_spi_remove(struct spi_device *spi)
  75 {
  76         st_press_common_remove(spi_get_drvdata(spi));
  77
  78         return 0;
  79 }
  80
  81 static const struct spi_device_id st_press_id_table[] = {
  82         { LPS001WP_PRESS_DEV_NAME },
  83         { LPS25H_PRESS_DEV_NAME },
  84         { LPS331AP_PRESS_DEV_NAME },
  85         { LPS22HB_PRESS_DEV_NAME },
  86         {},
  87 };
  88 MODULE_DEVICE_TABLE(spi, st_press_id_table);
  89
  90 static struct spi_driver st_press_driver = {
  91         .driver = {
  92                 .name = "st-press-spi",
  93                 .of_match_table = of_match_ptr(st_press_of_match),
  94         },
  95         .probe = st_press_spi_probe,
  96         .remove = st_press_spi_remove,
  97         .id_table = st_press_id_table,
  98 };
  99 module_spi_driver(st_press_driver);
 100
 101 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 102 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 103 MODULE_LICENSE("GPL v2");