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 {
  30         struct regmap *regmap;
  31
  32         regmap = devm_regmap_init_i2c(client, &hts221_i2c_regmap_config);
  33         if (IS_ERR(regmap)) {
  34                 dev_err(&client->dev, "Failed to register i2c regmap %ld\n",
  35                         PTR_ERR(regmap));
  36                 return PTR_ERR(regmap);
  37         }
  38
  39         return hts221_probe(&client->dev, client->irq,
  40                             client->name, regmap);
  41 }
  42
  43 static const struct acpi_device_id hts221_acpi_match[] = {
  44         {"SMO9100", 0},
  45         { },
  46 };
  47 MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
  48
  49 static const struct of_device_id hts221_i2c_of_match[] = {
  50         { .compatible = "st,hts221", },
  51         {},
  52 };
  53 MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
  54
  55 static const struct i2c_device_id hts221_i2c_id_table[] = {
  56         { HTS221_DEV_NAME },
  57         {},
  58 };
  59 MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
  60
  61 static struct i2c_driver hts221_driver = {
  62         .driver = {
  63                 .name = "hts221_i2c",
  64                 .pm = pm_sleep_ptr(&hts221_pm_ops),
  65                 .of_match_table = hts221_i2c_of_match,
  66                 .acpi_match_table = ACPI_PTR(hts221_acpi_match),
  67         },
  68         .probe = hts221_i2c_probe,
  69         .id_table = hts221_i2c_id_table,
  70 };
  71 module_i2c_driver(hts221_driver);
  72
  73 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
  74 MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
  75 MODULE_LICENSE("GPL v2");
  76 MODULE_IMPORT_NS(IIO_HTS221);