drivers/iio/light/st_uvis25_i2c.c

   1 /*
   2  * STMicroelectronics uvis25 i2c driver
   3  *
   4  * Copyright 2017 STMicroelectronics Inc.
   5  *
   6  * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
   7  *
   8  * Licensed under the GPL-2.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/acpi.h>
  14 #include <linux/i2c.h>
  15 #include <linux/slab.h>
  16 #include <linux/regmap.h>
  17
  18 #include "st_uvis25.h"
  19
  20 #define UVIS25_I2C_AUTO_INCREMENT       BIT(7)
  21
  22 static const struct regmap_config st_uvis25_i2c_regmap_config = {
  23         .reg_bits = 8,
  24         .val_bits = 8,
  25         .write_flag_mask = UVIS25_I2C_AUTO_INCREMENT,
  26         .read_flag_mask = UVIS25_I2C_AUTO_INCREMENT,
  27 };
  28
  29 static int st_uvis25_i2c_probe(struct i2c_client *client,
  30                                const struct i2c_device_id *id)
  31 {
  32         struct regmap *regmap;
  33
  34         regmap = devm_regmap_init_i2c(client, &st_uvis25_i2c_regmap_config);
  35         if (IS_ERR(regmap)) {
  36                 dev_err(&client->dev, "Failed to register i2c regmap %d\n",
  37                         (int)PTR_ERR(regmap));
  38                 return PTR_ERR(regmap);
  39         }
  40
  41         return st_uvis25_probe(&client->dev, client->irq, regmap);
  42 }
  43
  44 static const struct of_device_id st_uvis25_i2c_of_match[] = {
  45         { .compatible = "st,uvis25", },
  46         {},
  47 };
  48 MODULE_DEVICE_TABLE(of, st_uvis25_i2c_of_match);
  49
  50 static const struct i2c_device_id st_uvis25_i2c_id_table[] = {
  51         { ST_UVIS25_DEV_NAME },
  52         {},
  53 };
  54 MODULE_DEVICE_TABLE(i2c, st_uvis25_i2c_id_table);
  55
  56 static struct i2c_driver st_uvis25_driver = {
  57         .driver = {
  58                 .name = "st_uvis25_i2c",
  59                 .pm = &st_uvis25_pm_ops,
  60                 .of_match_table = of_match_ptr(st_uvis25_i2c_of_match),
  61         },
  62         .probe = st_uvis25_i2c_probe,
  63         .id_table = st_uvis25_i2c_id_table,
  64 };
  65 module_i2c_driver(st_uvis25_driver);
  66
  67 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
  68 MODULE_DESCRIPTION("STMicroelectronics uvis25 i2c driver");
  69 MODULE_LICENSE("GPL v2");