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                 .compatible = "st,lps22hh",
  54                 .data = LPS22HH_PRESS_DEV_NAME,
  55         },
  56         {},
  57 };
  58 MODULE_DEVICE_TABLE(of, st_press_of_match);
  59 #else
  60 #define st_press_of_match       NULL
  61 #endif
  62
  63 static int st_press_spi_probe(struct spi_device *spi)
  64 {
  65         struct iio_dev *indio_dev;
  66         struct st_sensor_data *press_data;
  67         int err;
  68
  69         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  70         if (indio_dev == NULL)
  71                 return -ENOMEM;
  72
  73         press_data = iio_priv(indio_dev);
  74
  75         st_sensors_of_name_probe(&spi->dev, st_press_of_match,
  76                                  spi->modalias, sizeof(spi->modalias));
  77         st_sensors_spi_configure(indio_dev, spi, press_data);
  78
  79         err = st_press_common_probe(indio_dev);
  80         if (err < 0)
  81                 return err;
  82
  83         return 0;
  84 }
  85
  86 static int st_press_spi_remove(struct spi_device *spi)
  87 {
  88         st_press_common_remove(spi_get_drvdata(spi));
  89
  90         return 0;
  91 }
  92
  93 static const struct spi_device_id st_press_id_table[] = {
  94         { LPS001WP_PRESS_DEV_NAME },
  95         { LPS25H_PRESS_DEV_NAME },
  96         { LPS331AP_PRESS_DEV_NAME },
  97         { LPS22HB_PRESS_DEV_NAME },
  98         { LPS33HW_PRESS_DEV_NAME },
  99         { LPS35HW_PRESS_DEV_NAME },
 100         { LPS22HH_PRESS_DEV_NAME },
 101         {},
 102 };
 103 MODULE_DEVICE_TABLE(spi, st_press_id_table);
 104
 105 static struct spi_driver st_press_driver = {
 106         .driver = {
 107                 .name = "st-press-spi",
 108                 .of_match_table = of_match_ptr(st_press_of_match),
 109         },
 110         .probe = st_press_spi_probe,
 111         .remove = st_press_spi_remove,
 112         .id_table = st_press_id_table,
 113 };
 114 module_spi_driver(st_press_driver);
 115
 116 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 117 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 118 MODULE_LICENSE("GPL v2");