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                 .compatible = "st,lps33hw",
  46                 .data = LPS33HW_PRESS_DEV_NAME,
  47         },
  48         {
  49                 .compatible = "st,lps35hw",
  50                 .data = LPS35HW_PRESS_DEV_NAME,
  51         },
  52         {},
  53 };
  54 MODULE_DEVICE_TABLE(of, st_press_of_match);
  55 #else
  56 #define st_press_of_match       NULL
  57 #endif
  58
  59 static int st_press_spi_probe(struct spi_device *spi)
  60 {
  61         struct iio_dev *indio_dev;
  62         struct st_sensor_data *press_data;
  63         int err;
  64
  65         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  66         if (indio_dev == NULL)
  67                 return -ENOMEM;
  68
  69         press_data = iio_priv(indio_dev);
  70
  71         st_sensors_of_name_probe(&spi->dev, st_press_of_match,
  72                                  spi->modalias, sizeof(spi->modalias));
  73         st_sensors_spi_configure(indio_dev, spi, press_data);
  74
  75         err = st_press_common_probe(indio_dev);
  76         if (err < 0)
  77                 return err;
  78
  79         return 0;
  80 }
  81
  82 static int st_press_spi_remove(struct spi_device *spi)
  83 {
  84         st_press_common_remove(spi_get_drvdata(spi));
  85
  86         return 0;
  87 }
  88
  89 static const struct spi_device_id st_press_id_table[] = {
  90         { LPS001WP_PRESS_DEV_NAME },
  91         { LPS25H_PRESS_DEV_NAME },
  92         { LPS331AP_PRESS_DEV_NAME },
  93         { LPS22HB_PRESS_DEV_NAME },
  94         { LPS33HW_PRESS_DEV_NAME },
  95         { LPS35HW_PRESS_DEV_NAME },
  96         {},
  97 };
  98 MODULE_DEVICE_TABLE(spi, st_press_id_table);
  99
 100 static struct spi_driver st_press_driver = {
 101         .driver = {
 102                 .name = "st-press-spi",
 103                 .of_match_table = of_match_ptr(st_press_of_match),
 104         },
 105         .probe = st_press_spi_probe,
 106         .remove = st_press_spi_remove,
 107         .id_table = st_press_id_table,
 108 };
 109 module_spi_driver(st_press_driver);
 110
 111 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 112 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 113 MODULE_LICENSE("GPL v2");