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