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,lsm303d-imu",
  23                 .data = LSM303D_IMU_DEV_NAME,
  24         },
  25         {
  26                 .compatible = "st,lsm9ds0-imu",
  27                 .data = LSM9DS0_IMU_DEV_NAME,
  28         },
  29         {}
  30 };
  31 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
  32
  33 static const struct i2c_device_id st_lsm9ds0_id_table[] = {
  34         { LSM303D_IMU_DEV_NAME },
  35         { LSM9DS0_IMU_DEV_NAME },
  36         {}
  37 };
  38 MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
  39
  40 static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
  41         {"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
  42         { },
  43 };
  44 MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);
  45
  46 static const struct regmap_config st_lsm9ds0_regmap_config = {
  47         .reg_bits       = 8,
  48         .val_bits       = 8,
  49         .read_flag_mask = 0x80,
  50 };
  51
  52 static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
  53 {
  54         const struct regmap_config *config = &st_lsm9ds0_regmap_config;
  55         struct device *dev = &client->dev;
  56         struct st_lsm9ds0 *lsm9ds0;
  57         struct regmap *regmap;
  58
  59         st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));
  60
  61         lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
  62         if (!lsm9ds0)
  63                 return -ENOMEM;
  64
  65         lsm9ds0->dev = dev;
  66         lsm9ds0->name = client->name;
  67         lsm9ds0->irq = client->irq;
  68
  69         regmap = devm_regmap_init_i2c(client, config);
  70         if (IS_ERR(regmap))
  71                 return PTR_ERR(regmap);
  72
  73         i2c_set_clientdata(client, lsm9ds0);
  74
  75         return st_lsm9ds0_probe(lsm9ds0, regmap);
  76 }
  77
  78 static struct i2c_driver st_lsm9ds0_driver = {
  79         .driver = {
  80                 .name = "st-lsm9ds0-i2c",
  81                 .of_match_table = st_lsm9ds0_of_match,
  82                 .acpi_match_table = st_lsm9ds0_acpi_match,
  83         },
  84         .probe = st_lsm9ds0_i2c_probe,
  85         .id_table = st_lsm9ds0_id_table,
  86 };
  87 module_i2c_driver(st_lsm9ds0_driver);
  88
  89 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  90 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU I2C driver");
  91 MODULE_LICENSE("GPL v2");
  92 MODULE_IMPORT_NS(IIO_ST_SENSORS);