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 #ifdef CONFIG_OF
  21 /*
  22  * For new single-chip sensors use <device_name> as compatible string.
  23  * For old single-chip devices keep <device_name>-press to maintain
  24  * compatibility
  25  */
  26 static const struct of_device_id st_press_of_match[] = {
  27         {
  28                 .compatible = "st,lps001wp-press",
  29                 .data = LPS001WP_PRESS_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lps25h-press",
  33                 .data = LPS25H_PRESS_DEV_NAME,
  34         },
  35         {
  36                 .compatible = "st,lps331ap-press",
  37                 .data = LPS331AP_PRESS_DEV_NAME,
  38         },
  39         {
  40                 .compatible = "st,lps22hb-press",
  41                 .data = LPS22HB_PRESS_DEV_NAME,
  42         },
  43         {
  44                 .compatible = "st,lps33hw",
  45                 .data = LPS33HW_PRESS_DEV_NAME,
  46         },
  47         {
  48                 .compatible = "st,lps35hw",
  49                 .data = LPS35HW_PRESS_DEV_NAME,
  50         },
  51         {
  52                 .compatible = "st,lps22hh",
  53                 .data = LPS22HH_PRESS_DEV_NAME,
  54         },
  55         {},
  56 };
  57 MODULE_DEVICE_TABLE(of, st_press_of_match);
  58 #else
  59 #define st_press_of_match       NULL
  60 #endif
  61
  62 static int st_press_spi_probe(struct spi_device *spi)
  63 {
  64         const struct st_sensor_settings *settings;
  65         struct st_sensor_data *press_data;
  66         struct iio_dev *indio_dev;
  67         int err;
  68
  69         st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
  70
  71         settings = st_press_get_settings(spi->modalias);
  72         if (!settings) {
  73                 dev_err(&spi->dev, "device name %s not recognized.\n",
  74                         spi->modalias);
  75                 return -ENODEV;
  76         }
  77
  78         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  79         if (!indio_dev)
  80                 return -ENOMEM;
  81
  82         press_data = iio_priv(indio_dev);
  83         press_data->sensor_settings = (struct st_sensor_settings *)settings;
  84
  85         err = st_sensors_spi_configure(indio_dev, spi);
  86         if (err < 0)
  87                 return err;
  88
  89         err = st_press_common_probe(indio_dev);
  90         if (err < 0)
  91                 return err;
  92
  93         return 0;
  94 }
  95
  96 static int st_press_spi_remove(struct spi_device *spi)
  97 {
  98         st_press_common_remove(spi_get_drvdata(spi));
  99
 100         return 0;
 101 }
 102
 103 static const struct spi_device_id st_press_id_table[] = {
 104         { LPS001WP_PRESS_DEV_NAME },
 105         { LPS25H_PRESS_DEV_NAME },
 106         { LPS331AP_PRESS_DEV_NAME },
 107         { LPS22HB_PRESS_DEV_NAME },
 108         { LPS33HW_PRESS_DEV_NAME },
 109         { LPS35HW_PRESS_DEV_NAME },
 110         { LPS22HH_PRESS_DEV_NAME },
 111         {},
 112 };
 113 MODULE_DEVICE_TABLE(spi, st_press_id_table);
 114
 115 static struct spi_driver st_press_driver = {
 116         .driver = {
 117                 .name = "st-press-spi",
 118                 .of_match_table = of_match_ptr(st_press_of_match),
 119         },
 120         .probe = st_press_spi_probe,
 121         .remove = st_press_spi_remove,
 122         .id_table = st_press_id_table,
 123 };
 124 module_spi_driver(st_press_driver);
 125
 126 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 127 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 128 MODULE_LICENSE("GPL v2");