drivers/iio/pressure/st_pressure_i2c.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/acpi.h>
  14 #include <linux/i2c.h>
  15 #include <linux/iio/iio.h>
  16
  17 #include <linux/iio/common/st_sensors.h>
  18 #include <linux/iio/common/st_sensors_i2c.h>
  19 #include "st_pressure.h"
  20
  21 #ifdef CONFIG_OF
  22 static const struct of_device_id st_press_of_match[] = {
  23         {
  24                 .compatible = "st,lps001wp-press",
  25                 .data = LPS001WP_PRESS_DEV_NAME,
  26         },
  27         {
  28                 .compatible = "st,lps25h-press",
  29                 .data = LPS25H_PRESS_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lps331ap-press",
  33                 .data = LPS331AP_PRESS_DEV_NAME,
  34         },
  35         {
  36                 .compatible = "st,lps22hb-press",
  37                 .data = LPS22HB_PRESS_DEV_NAME,
  38         },
  39         {
  40                 .compatible = "st,lps33hw",
  41                 .data = LPS33HW_PRESS_DEV_NAME,
  42         },
  43         {
  44                 .compatible = "st,lps35hw",
  45                 .data = LPS35HW_PRESS_DEV_NAME,
  46         },
  47         {
  48                 .compatible = "st,lps22hh",
  49                 .data = LPS22HH_PRESS_DEV_NAME,
  50         },
  51         {},
  52 };
  53 MODULE_DEVICE_TABLE(of, st_press_of_match);
  54 #else
  55 #define st_press_of_match NULL
  56 #endif
  57
  58 #ifdef CONFIG_ACPI
  59 static const struct acpi_device_id st_press_acpi_match[] = {
  60         {"SNO9210", LPS22HB},
  61         { },
  62 };
  63 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
  64 #else
  65 #define st_press_acpi_match NULL
  66 #endif
  67
  68 static const struct i2c_device_id st_press_id_table[] = {
  69         { LPS001WP_PRESS_DEV_NAME, LPS001WP },
  70         { LPS25H_PRESS_DEV_NAME,  LPS25H },
  71         { LPS331AP_PRESS_DEV_NAME, LPS331AP },
  72         { LPS22HB_PRESS_DEV_NAME, LPS22HB },
  73         { LPS33HW_PRESS_DEV_NAME, LPS33HW },
  74         { LPS35HW_PRESS_DEV_NAME, LPS35HW },
  75         { LPS22HH_PRESS_DEV_NAME, LPS22HH },
  76         {},
  77 };
  78 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
  79
  80 static int st_press_i2c_probe(struct i2c_client *client,
  81                               const struct i2c_device_id *id)
  82 {
  83         const struct st_sensor_settings *settings;
  84         struct st_sensor_data *press_data;
  85         struct iio_dev *indio_dev;
  86         int ret;
  87
  88         if (client->dev.of_node) {
  89                 st_sensors_of_name_probe(&client->dev, st_press_of_match,
  90                                          client->name, sizeof(client->name));
  91         } else if (ACPI_HANDLE(&client->dev)) {
  92                 ret = st_sensors_match_acpi_device(&client->dev);
  93                 if ((ret < 0) || (ret >= ST_PRESS_MAX))
  94                         return -ENODEV;
  95
  96                 strlcpy(client->name, st_press_id_table[ret].name,
  97                         sizeof(client->name));
  98         } else if (!id)
  99                 return -ENODEV;
 100
 101         settings = st_press_get_settings(client->name);
 102         if (!settings) {
 103                 dev_err(&client->dev, "device name %s not recognized.\n",
 104                         client->name);
 105                 return -ENODEV;
 106         }
 107
 108         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
 109         if (!indio_dev)
 110                 return -ENOMEM;
 111
 112         press_data = iio_priv(indio_dev);
 113         press_data->sensor_settings = (struct st_sensor_settings *)settings;
 114
 115         ret = st_sensors_i2c_configure(indio_dev, client);
 116         if (ret < 0)
 117                 return ret;
 118
 119         ret = st_press_common_probe(indio_dev);
 120         if (ret < 0)
 121                 return ret;
 122
 123         return 0;
 124 }
 125
 126 static int st_press_i2c_remove(struct i2c_client *client)
 127 {
 128         st_press_common_remove(i2c_get_clientdata(client));
 129
 130         return 0;
 131 }
 132
 133 static struct i2c_driver st_press_driver = {
 134         .driver = {
 135                 .name = "st-press-i2c",
 136                 .of_match_table = of_match_ptr(st_press_of_match),
 137                 .acpi_match_table = ACPI_PTR(st_press_acpi_match),
 138         },
 139         .probe = st_press_i2c_probe,
 140         .remove = st_press_i2c_remove,
 141         .id_table = st_press_id_table,
 142 };
 143 module_i2c_driver(st_press_driver);
 144
 145 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 146 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
 147 MODULE_LICENSE("GPL v2");