drivers/iio/pressure/st_pressure_spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics pressures driver
   4  *
   5  * Copyright 2013 STMicroelectronics Inc.
   6  *
   7  * Denis Ciocca <denis.ciocca@st.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/spi/spi.h>
  14 #include <linux/iio/iio.h>
  15
  16 #include <linux/iio/common/st_sensors.h>
  17 #include <linux/iio/common/st_sensors_spi.h>
  18 #include "st_pressure.h"
  19
  20 /*
  21  * For new single-chip sensors use <device_name> as compatible string.
  22  * For old single-chip devices keep <device_name>-press to maintain
  23  * compatibility
  24  */
  25 static const struct of_device_id st_press_of_match[] = {
  26         {
  27                 .compatible = "st,lps001wp-press",
  28                 .data = LPS001WP_PRESS_DEV_NAME,
  29         },
  30         {
  31                 .compatible = "st,lps25h-press",
  32                 .data = LPS25H_PRESS_DEV_NAME,
  33         },
  34         {
  35                 .compatible = "st,lps331ap-press",
  36                 .data = LPS331AP_PRESS_DEV_NAME,
  37         },
  38         {
  39                 .compatible = "st,lps22hb-press",
  40                 .data = LPS22HB_PRESS_DEV_NAME,
  41         },
  42         {
  43                 .compatible = "st,lps33hw",
  44                 .data = LPS33HW_PRESS_DEV_NAME,
  45         },
  46         {
  47                 .compatible = "st,lps35hw",
  48                 .data = LPS35HW_PRESS_DEV_NAME,
  49         },
  50         {
  51                 .compatible = "st,lps22hh",
  52                 .data = LPS22HH_PRESS_DEV_NAME,
  53         },
  54         {},
  55 };
  56 MODULE_DEVICE_TABLE(of, st_press_of_match);
  57
  58 static int st_press_spi_probe(struct spi_device *spi)
  59 {
  60         const struct st_sensor_settings *settings;
  61         struct st_sensor_data *press_data;
  62         struct iio_dev *indio_dev;
  63         int err;
  64
  65         st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
  66
  67         settings = st_press_get_settings(spi->modalias);
  68         if (!settings) {
  69                 dev_err(&spi->dev, "device name %s not recognized.\n",
  70                         spi->modalias);
  71                 return -ENODEV;
  72         }
  73
  74         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  75         if (!indio_dev)
  76                 return -ENOMEM;
  77
  78         press_data = iio_priv(indio_dev);
  79         press_data->sensor_settings = (struct st_sensor_settings *)settings;
  80
  81         err = st_sensors_spi_configure(indio_dev, spi);
  82         if (err < 0)
  83                 return err;
  84
  85         err = st_press_common_probe(indio_dev);
  86         if (err < 0)
  87                 return err;
  88
  89         return 0;
  90 }
  91
  92 static int st_press_spi_remove(struct spi_device *spi)
  93 {
  94         st_press_common_remove(spi_get_drvdata(spi));
  95
  96         return 0;
  97 }
  98
  99 static const struct spi_device_id st_press_id_table[] = {
 100         { LPS001WP_PRESS_DEV_NAME },
 101         { LPS25H_PRESS_DEV_NAME },
 102         { LPS331AP_PRESS_DEV_NAME },
 103         { LPS22HB_PRESS_DEV_NAME },
 104         { LPS33HW_PRESS_DEV_NAME },
 105         { LPS35HW_PRESS_DEV_NAME },
 106         { LPS22HH_PRESS_DEV_NAME },
 107         {},
 108 };
 109 MODULE_DEVICE_TABLE(spi, st_press_id_table);
 110
 111 static struct spi_driver st_press_driver = {
 112         .driver = {
 113                 .name = "st-press-spi",
 114                 .of_match_table = st_press_of_match,
 115         },
 116         .probe = st_press_spi_probe,
 117         .remove = st_press_spi_remove,
 118         .id_table = st_press_id_table,
 119 };
 120 module_spi_driver(st_press_driver);
 121
 122 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 123 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 124 MODULE_LICENSE("GPL v2");