drivers/iio/imu/st_lsm9ds0/st_lsm9ds0_spi.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/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/mod_devicetable.h>
  13 #include <linux/regmap.h>
  14 #include <linux/spi/spi.h>
  15
  16 #include <linux/iio/common/st_sensors_spi.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 spi_device_id st_lsm9ds0_id_table[] = {
  30         { LSM9DS0_IMU_DEV_NAME },
  31         {}
  32 };
  33 MODULE_DEVICE_TABLE(spi, 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 = 0xc0,
  39 };
  40
  41 static int st_lsm9ds0_spi_probe(struct spi_device *spi)
  42 {
  43         struct device *dev = &spi->dev;
  44         struct st_lsm9ds0 *lsm9ds0;
  45         struct regmap *regmap;
  46
  47         st_sensors_dev_name_probe(dev, spi->modalias, sizeof(spi->modalias));
  48
  49         lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
  50         if (!lsm9ds0)
  51                 return -ENOMEM;
  52
  53         lsm9ds0->dev = dev;
  54         lsm9ds0->name = spi->modalias;
  55         lsm9ds0->irq = spi->irq;
  56
  57         regmap = devm_regmap_init_spi(spi, &st_lsm9ds0_regmap_config);
  58         if (IS_ERR(regmap))
  59                 return PTR_ERR(regmap);
  60
  61         spi_set_drvdata(spi, lsm9ds0);
  62
  63         return st_lsm9ds0_probe(lsm9ds0, regmap);
  64 }
  65
  66 static struct spi_driver st_lsm9ds0_driver = {
  67         .driver = {
  68                 .name = "st-lsm9ds0-spi",
  69                 .of_match_table = st_lsm9ds0_of_match,
  70         },
  71         .probe = st_lsm9ds0_spi_probe,
  72         .id_table = st_lsm9ds0_id_table,
  73 };
  74 module_spi_driver(st_lsm9ds0_driver);
  75
  76 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  77 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU SPI driver");
  78 MODULE_LICENSE("GPL v2");