drivers/iio/humidity/hts221_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics hts221 i2c driver
   4  *
   5  * Copyright 2016 STMicroelectronics Inc.
   6  *
   7  * Lorenzo Bianconi <lorenzo.bianconi@st.com>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/acpi.h>
  13 #include <linux/i2c.h>
  14 #include <linux/slab.h>
  15 #include <linux/regmap.h>
  16
  17 #include "hts221.h"
  18
  19 #define HTS221_I2C_AUTO_INCREMENT       BIT(7)
  20
  21 static const struct regmap_config hts221_i2c_regmap_config = {
  22         .reg_bits = 8,
  23         .val_bits = 8,
  24         .write_flag_mask = HTS221_I2C_AUTO_INCREMENT,
  25         .read_flag_mask = HTS221_I2C_AUTO_INCREMENT,
  26 };
  27
  28 static int hts221_i2c_probe(struct i2c_client *client,
  29                             const struct i2c_device_id *id)
  30 {
  31         struct regmap *regmap;
  32
  33         regmap = devm_regmap_init_i2c(client, &hts221_i2c_regmap_config);
  34         if (IS_ERR(regmap)) {
  35                 dev_err(&client->dev, "Failed to register i2c regmap %d\n",
  36                         (int)PTR_ERR(regmap));
  37                 return PTR_ERR(regmap);
  38         }
  39
  40         return hts221_probe(&client->dev, client->irq,
  41                             client->name, regmap);
  42 }
  43
  44 static const struct acpi_device_id hts221_acpi_match[] = {
  45         {"SMO9100", 0},
  46         { },
  47 };
  48 MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
  49
  50 static const struct of_device_id hts221_i2c_of_match[] = {
  51         { .compatible = "st,hts221", },
  52         {},
  53 };
  54 MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
  55
  56 static const struct i2c_device_id hts221_i2c_id_table[] = {
  57         { HTS221_DEV_NAME },
  58         {},
  59 };
  60 MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
  61
  62 static struct i2c_driver hts221_driver = {
  63         .driver = {
  64                 .name = "hts221_i2c",
  65                 .pm = &hts221_pm_ops,
  66                 .of_match_table = of_match_ptr(hts221_i2c_of_match),
  67                 .acpi_match_table = ACPI_PTR(hts221_acpi_match),
  68         },
  69         .probe = hts221_i2c_probe,
  70         .id_table = hts221_i2c_id_table,
  71 };
  72 module_i2c_driver(hts221_driver);
  73
  74 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
  75 MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
  76 MODULE_LICENSE("GPL v2");