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                 .compatible = "st,lps22hh",
  50                 .data = LPS22HH_PRESS_DEV_NAME,
  51         },
  52         {},
  53 };
  54 MODULE_DEVICE_TABLE(of, st_press_of_match);
  55 #else
  56 #define st_press_of_match NULL
  57 #endif
  58
  59 #ifdef CONFIG_ACPI
  60 static const struct acpi_device_id st_press_acpi_match[] = {
  61         {"SNO9210", LPS22HB},
  62         { },
  63 };
  64 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);
  65 #else
  66 #define st_press_acpi_match NULL
  67 #endif
  68
  69 static const struct i2c_device_id st_press_id_table[] = {
  70         { LPS001WP_PRESS_DEV_NAME, LPS001WP },
  71         { LPS25H_PRESS_DEV_NAME,  LPS25H },
  72         { LPS331AP_PRESS_DEV_NAME, LPS331AP },
  73         { LPS22HB_PRESS_DEV_NAME, LPS22HB },
  74         { LPS33HW_PRESS_DEV_NAME, LPS33HW },
  75         { LPS35HW_PRESS_DEV_NAME, LPS35HW },
  76         { LPS22HH_PRESS_DEV_NAME, LPS22HH },
  77         {},
  78 };
  79 MODULE_DEVICE_TABLE(i2c, st_press_id_table);
  80
  81 static int st_press_i2c_probe(struct i2c_client *client,
  82                                                 const struct i2c_device_id *id)
  83 {
  84         struct iio_dev *indio_dev;
  85         struct st_sensor_data *press_data;
  86         int ret;
  87
  88         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data));
  89         if (!indio_dev)
  90                 return -ENOMEM;
  91
  92         press_data = iio_priv(indio_dev);
  93
  94         if (client->dev.of_node) {
  95                 st_sensors_of_name_probe(&client->dev, st_press_of_match,
  96                                          client->name, sizeof(client->name));
  97         } else if (ACPI_HANDLE(&client->dev)) {
  98                 ret = st_sensors_match_acpi_device(&client->dev);
  99                 if ((ret < 0) || (ret >= ST_PRESS_MAX))
 100                         return -ENODEV;
 101
 102                 strlcpy(client->name, st_press_id_table[ret].name,
 103                                 sizeof(client->name));
 104         } else if (!id)
 105                 return -ENODEV;
 106
 107         st_sensors_i2c_configure(indio_dev, client, press_data);
 108
 109         ret = st_press_common_probe(indio_dev);
 110         if (ret < 0)
 111                 return ret;
 112
 113         return 0;
 114 }
 115
 116 static int st_press_i2c_remove(struct i2c_client *client)
 117 {
 118         st_press_common_remove(i2c_get_clientdata(client));
 119
 120         return 0;
 121 }
 122
 123 static struct i2c_driver st_press_driver = {
 124         .driver = {
 125                 .name = "st-press-i2c",
 126                 .of_match_table = of_match_ptr(st_press_of_match),
 127                 .acpi_match_table = ACPI_PTR(st_press_acpi_match),
 128         },
 129         .probe = st_press_i2c_probe,
 130         .remove = st_press_i2c_remove,
 131         .id_table = st_press_id_table,
 132 };
 133 module_i2c_driver(st_press_driver);
 134
 135 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 136 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
 137 MODULE_LICENSE("GPL v2");