drivers/iio/accel/adxl355_spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ADXL355 3-Axis Digital Accelerometer SPI driver
   4  *
   5  * Copyright (c) 2021 Puranjay Mohan <puranjay12@gmail.com>
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/mod_devicetable.h>
  10 #include <linux/regmap.h>
  11 #include <linux/spi/spi.h>
  12 #include <linux/property.h>
  13
  14 #include "adxl355.h"
  15
  16 static const struct regmap_config adxl355_spi_regmap_config = {
  17         .reg_bits = 7,
  18         .pad_bits = 1,
  19         .val_bits = 8,
  20         .read_flag_mask = BIT(0),
  21         .max_register = 0x2F,
  22         .rd_table = &adxl355_readable_regs_tbl,
  23         .wr_table = &adxl355_writeable_regs_tbl,
  24 };
  25
  26 static int adxl355_spi_probe(struct spi_device *spi)
  27 {
  28         const struct adxl355_chip_info *chip_data;
  29         struct regmap *regmap;
  30
  31         chip_data = spi_get_device_match_data(spi);
  32         if (!chip_data)
  33                 return -EINVAL;
  34
  35         regmap = devm_regmap_init_spi(spi, &adxl355_spi_regmap_config);
  36         if (IS_ERR(regmap)) {
  37                 dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
  38                         PTR_ERR(regmap));
  39
  40                 return PTR_ERR(regmap);
  41         }
  42
  43         return adxl355_core_probe(&spi->dev, regmap, chip_data);
  44 }
  45
  46 static const struct spi_device_id adxl355_spi_id[] = {
  47         { "adxl355", (kernel_ulong_t)&adxl35x_chip_info[ADXL355] },
  48         { "adxl359", (kernel_ulong_t)&adxl35x_chip_info[ADXL359] },
  49         { }
  50 };
  51 MODULE_DEVICE_TABLE(spi, adxl355_spi_id);
  52
  53 static const struct of_device_id adxl355_of_match[] = {
  54         { .compatible = "adi,adxl355", .data = &adxl35x_chip_info[ADXL355] },
  55         { .compatible = "adi,adxl359", .data = &adxl35x_chip_info[ADXL359] },
  56         { }
  57 };
  58 MODULE_DEVICE_TABLE(of, adxl355_of_match);
  59
  60 static struct spi_driver adxl355_spi_driver = {
  61         .driver = {
  62                 .name   = "adxl355_spi",
  63                 .of_match_table = adxl355_of_match,
  64         },
  65         .probe          = adxl355_spi_probe,
  66         .id_table       = adxl355_spi_id,
  67 };
  68 module_spi_driver(adxl355_spi_driver);
  69
  70 MODULE_AUTHOR("Puranjay Mohan <puranjay12@gmail.com>");
  71 MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer SPI driver");
  72 MODULE_LICENSE("GPL v2");
  73 MODULE_IMPORT_NS("IIO_ADXL355");