drivers/iio/pressure/st_pressure_i2c.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/acpi.h>
  15 #include <linux/i2c.h>
  16 #include <linux/iio/iio.h>
  17
  18 #include <linux/iio/common/st_sensors.h>
  19 #include <linux/iio/common/st_sensors_i2c.h>
  20 #include "st_pressure.h"
  21
  22 #ifdef CONFIG_OF
  23 static const struct of_device_id st_press_of_match[] = {
  24         {
  25                 .compatible = "st,lps001wp-press",
  26                 .data = LPS001WP_PRESS_DEV_NAME,
  27         },
  28         {
  29                 .compatible = "st,lps25h-press",
  30                 .data = LPS25H_PRESS_DEV_NAME,
  31         },
  32         {
  33                 .compatible = "st,lps331ap-press",
  34                 .data = LPS331AP_PRESS_DEV_NAME,
  35         },
  36         {
  37                 .compatible = "st,lps22hb-press",
  38                 .data = LPS22HB_PRESS_DEV_NAME,
  39         },
  40         {
  41                 .compatible = "st,lps33hw",
  42                 .data = LPS33HW_PRESS_DEV_NAME,
  43         },
  44         {
  45                 .compatible = "st,lps35hw",
  46                 .data = LPS35HW_PRESS_DEV_NAME,
  47         },
  48         {},
  49 };
  50 MODULE_DEVICE_TABLE(of, st_press_of_match);
  51 #else
  52 #define st_press_of_match NULL
  53 #endif
  54
  55 #ifdef CONFIG_ACPI
  56 static const struct acpi_device_id st_press_acpi_match[] = {
  57         {"SNO9210", LPS22HB},
  58         { },
  59 };
  60 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
  61 #else
  62 #define st_press_acpi_match NULL
  63 #endif
  64
  65 static const struct i2c_device_id st_press_id_table[] = {
  66         { LPS001WP_PRESS_DEV_NAME, LPS001WP },
  67         { LPS25H_PRESS_DEV_NAME,  LPS25H },
  68         { LPS331AP_PRESS_DEV_NAME, LPS331AP },
  69         { LPS22HB_PRESS_DEV_NAME, LPS22HB },
  70         { LPS33HW_PRESS_DEV_NAME, LPS33HW },
  71         { LPS35HW_PRESS_DEV_NAME, LPS35HW },
  72         {},
  73 };
  74 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
  75
  76 static int st_press_i2c_probe(struct i2c_client *client,
  77                                                 const struct i2c_device_id *id)
  78 {
  79         struct iio_dev *indio_dev;
  80         struct st_sensor_data *press_data;
  81         int ret;
  82
  83         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
  84         if (!indio_dev)
  85                 return -ENOMEM;
  86
  87         press_data = iio_priv(indio_dev);
  88
  89         if (client->dev.of_node) {
  90                 st_sensors_of_name_probe(&client->dev, st_press_of_match,
  91                                          client->name, sizeof(client->name));
  92         } else if (ACPI_HANDLE(&client->dev)) {
  93                 ret = st_sensors_match_acpi_device(&client->dev);
  94                 if ((ret < 0) || (ret >= ST_PRESS_MAX))
  95                         return -ENODEV;
  96
  97                 strncpy(client->name, st_press_id_table[ret].name,
  98                                 sizeof(client->name));
  99                 client->name[sizeof(client->name) - 1] = '\0';
 100         } else if (!id)
 101                 return -ENODEV;
 102
 103         st_sensors_i2c_configure(indio_dev, client, press_data);
 104
 105         ret = st_press_common_probe(indio_dev);
 106         if (ret < 0)
 107                 return ret;
 108
 109         return 0;
 110 }
 111
 112 static int st_press_i2c_remove(struct i2c_client *client)
 113 {
 114         st_press_common_remove(i2c_get_clientdata(client));
 115
 116         return 0;
 117 }
 118
 119 static struct i2c_driver st_press_driver = {
 120         .driver = {
 121                 .name = "st-press-i2c",
 122                 .of_match_table = of_match_ptr(st_press_of_match),
 123                 .acpi_match_table = ACPI_PTR(st_press_acpi_match),
 124         },
 125         .probe = st_press_i2c_probe,
 126         .remove = st_press_i2c_remove,
 127         .id_table = st_press_id_table,
 128 };
 129 module_i2c_driver(st_press_driver);
 130
 131 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 132 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
 133 MODULE_LICENSE("GPL v2");