drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics LSM9DS0 IMU driver
   4  *
   5  * Copyright (C) 2021, Intel Corporation
   6  *
   7  * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   8  */
   9
  10 #include <linux/i2c.h>
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/mod_devicetable.h>
  14 #include <linux/regmap.h>
  15
  16 #include <linux/iio/common/st_sensors_i2c.h>
  17
  18 #include "st_lsm9ds0.h"
  19
  20 static const struct of_device_id st_lsm9ds0_of_match[] = {
  21         {
  22                 .compatible = "st,lsm9ds0-imu",
  23                 .data = LSM9DS0_IMU_DEV_NAME,
  24         },
  25         {}
  26 };
  27 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
  28
  29 static const struct i2c_device_id st_lsm9ds0_id_table[] = {
  30         { LSM9DS0_IMU_DEV_NAME },
  31         {}
  32 };
  33 MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
  34
  35 static const struct regmap_config st_lsm9ds0_regmap_config = {
  36         .reg_bits       = 8,
  37         .val_bits       = 8,
  38         .read_flag_mask = 0x80,
  39 };
  40
  41 static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
  42 {
  43         const struct regmap_config *config = &st_lsm9ds0_regmap_config;
  44         struct device *dev = &client->dev;
  45         struct st_lsm9ds0 *lsm9ds0;
  46         struct regmap *regmap;
  47
  48         st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));
  49
  50         lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
  51         if (!lsm9ds0)
  52                 return -ENOMEM;
  53
  54         lsm9ds0->dev = dev;
  55         lsm9ds0->name = client->name;
  56         lsm9ds0->irq = client->irq;
  57
  58         regmap = devm_regmap_init_i2c(client, config);
  59         if (IS_ERR(regmap))
  60                 return PTR_ERR(regmap);
  61
  62         i2c_set_clientdata(client, lsm9ds0);
  63
  64         return st_lsm9ds0_probe(lsm9ds0, regmap);
  65 }
  66
  67 static int st_lsm9ds0_i2c_remove(struct i2c_client *client)
  68 {
  69         return st_lsm9ds0_remove(i2c_get_clientdata(client));
  70 }
  71
  72 static struct i2c_driver st_lsm9ds0_driver = {
  73         .driver = {
  74                 .name = "st-lsm9ds0-i2c",
  75                 .of_match_table = st_lsm9ds0_of_match,
  76         },
  77         .probe_new = st_lsm9ds0_i2c_probe,
  78         .remove = st_lsm9ds0_i2c_remove,
  79         .id_table = st_lsm9ds0_id_table,
  80 };
  81 module_i2c_driver(st_lsm9ds0_driver);
  82
  83 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  84 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU I2C driver");
  85 MODULE_LICENSE("GPL v2");