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/device.h>
  11 #include <linux/err.h>
  12 #include <linux/gfp_types.h>
  13 #include <linux/module.h>
  14 #include <linux/mod_devicetable.h>
  15 #include <linux/regmap.h>
  16 #include <linux/spi/spi.h>
  17
  18 #include <linux/iio/common/st_sensors_spi.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 spi_device_id st_lsm9ds0_id_table[] = {
  36         { LSM303D_IMU_DEV_NAME },
  37         { LSM9DS0_IMU_DEV_NAME },
  38         {}
  39 };
  40 MODULE_DEVICE_TABLE(spi, st_lsm9ds0_id_table);
  41
  42 static const struct regmap_config st_lsm9ds0_regmap_config = {
  43         .reg_bits       = 8,
  44         .val_bits       = 8,
  45         .read_flag_mask = 0xc0,
  46 };
  47
  48 static int st_lsm9ds0_spi_probe(struct spi_device *spi)
  49 {
  50         struct device *dev = &spi->dev;
  51         struct st_lsm9ds0 *lsm9ds0;
  52         struct regmap *regmap;
  53
  54         st_sensors_dev_name_probe(dev, spi->modalias, sizeof(spi->modalias));
  55
  56         lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
  57         if (!lsm9ds0)
  58                 return -ENOMEM;
  59
  60         lsm9ds0->dev = dev;
  61         lsm9ds0->name = spi->modalias;
  62         lsm9ds0->irq = spi->irq;
  63
  64         regmap = devm_regmap_init_spi(spi, &st_lsm9ds0_regmap_config);
  65         if (IS_ERR(regmap))
  66                 return PTR_ERR(regmap);
  67
  68         spi_set_drvdata(spi, lsm9ds0);
  69
  70         return st_lsm9ds0_probe(lsm9ds0, regmap);
  71 }
  72
  73 static struct spi_driver st_lsm9ds0_driver = {
  74         .driver = {
  75                 .name = "st-lsm9ds0-spi",
  76                 .of_match_table = st_lsm9ds0_of_match,
  77         },
  78         .probe = st_lsm9ds0_spi_probe,
  79         .id_table = st_lsm9ds0_id_table,
  80 };
  81 module_spi_driver(st_lsm9ds0_driver);
  82
  83 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  84 MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU SPI driver");
  85 MODULE_LICENSE("GPL v2");
  86 MODULE_IMPORT_NS("IIO_ST_SENSORS");