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/device.h>
  11 #include <linux/err.h>
  12 #include <linux/gfp_types.h>
  13 #include <linux/i2c.h>
  14 #include <linux/module.h>
  15 #include <linux/mod_devicetable.h>
  16 #include <linux/regmap.h>
  17
  18 #include <linux/iio/common/st_sensors_i2c.h>
  19
  20 #include "st_lsm9ds0.h"
  21
  22 static const struct of_device_id st_lsm9ds0_of_match[] = {
  23         {
  24                 .compatible = "st,lsm303d-imu",
  25                 .data = LSM303D_IMU_DEV_NAME,
  26         },
  27         {
  28                 .compatible = "st,lsm9ds0-imu",
  29                 .data = LSM9DS0_IMU_DEV_NAME,
  30         },
  31         {}
  32 };
  33 MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
  34
  35 static const struct i2c_device_id st_lsm9ds0_id_table[] = {
  36         { LSM303D_IMU_DEV_NAME },
  37         { LSM9DS0_IMU_DEV_NAME },
  38         {}
  39 };
  40 MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
  41
  42 static const struct acpi_device_id st_lsm9ds0_acpi_match[] = {
  43         {"ACCL0001", (kernel_ulong_t)LSM303D_IMU_DEV_NAME},
  44         {}
  45 };
  46 MODULE_DEVICE_TABLE(acpi, st_lsm9ds0_acpi_match);
  47
  48 static const struct regmap_config st_lsm9ds0_regmap_config = {
  49         .reg_bits       = 8,
  50         .val_bits       = 8,
  51         .read_flag_mask = 0x80,
  52 };
  53
  54 static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
  55 {
  56         const struct regmap_config *config = &st_lsm9ds0_regmap_config;
  57         struct device *dev = &client->dev;
  58         struct st_lsm9ds0 *lsm9ds0;
  59         struct regmap *regmap;
  60
  61         st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));
  62
  63         lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
  64         if (!lsm9ds0)
  65                 return -ENOMEM;
  66
  67         lsm9ds0->dev = dev;
  68         lsm9ds0->name = client->name;
  69         lsm9ds0->irq = client->irq;
  70
  71         regmap = devm_regmap_init_i2c(client, config);
  72         if (IS_ERR(regmap))
  73                 return PTR_ERR(regmap);
  74
  75         i2c_set_clientdata(client, lsm9ds0);
  76
  77         return st_lsm9ds0_probe(lsm9ds0, regmap);
  78 }
  79
  80 static struct i2c_driver st_lsm9ds0_driver = {
  81         .driver = {
  82                 .name = "st-lsm9ds0-i2c",
  83                 .of_match_table = st_lsm9ds0_of_match,
  84                 .acpi_match_table = st_lsm9ds0_acpi_match,
  85         },
  86         .probe = st_lsm9ds0_i2c_probe,
  87         .id_table = st_lsm9ds0_id_table,
  88 };
  89 module_i2c_driver(st_lsm9ds0_driver);
  90
  91 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  92 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU I2C driver");
  93 MODULE_LICENSE("GPL v2");
  94 MODULE_IMPORT_NS("IIO_ST_SENSORS");