drivers/iio/accel/adxl313_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ADXL313 3-Axis Digital Accelerometer
   4  *
   5  * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
   6  *
   7  * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
   8  */
   9
  10 #include <linux/i2c.h>
  11 #include <linux/mod_devicetable.h>
  12 #include <linux/module.h>
  13 #include <linux/regmap.h>
  14
  15 #include "adxl313.h"
  16
  17 static const struct regmap_config adxl31x_i2c_regmap_config[] = {
  18         [ADXL312] = {
  19                 .reg_bits       = 8,
  20                 .val_bits       = 8,
  21                 .rd_table       = &adxl312_readable_regs_table,
  22                 .wr_table       = &adxl312_writable_regs_table,
  23                 .max_register   = 0x39,
  24         },
  25         [ADXL313] = {
  26                 .reg_bits       = 8,
  27                 .val_bits       = 8,
  28                 .rd_table       = &adxl313_readable_regs_table,
  29                 .wr_table       = &adxl313_writable_regs_table,
  30                 .max_register   = 0x39,
  31         },
  32         [ADXL314] = {
  33                 .reg_bits       = 8,
  34                 .val_bits       = 8,
  35                 .rd_table       = &adxl314_readable_regs_table,
  36                 .wr_table       = &adxl314_writable_regs_table,
  37                 .max_register   = 0x39,
  38         },
  39 };
  40
  41 static const struct i2c_device_id adxl313_i2c_id[] = {
  42         { .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },
  43         { .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL313] },
  44         { .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL314] },
  45         { }
  46 };
  47
  48 MODULE_DEVICE_TABLE(i2c, adxl313_i2c_id);
  49
  50 static const struct of_device_id adxl313_of_match[] = {
  51         { .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] },
  52         { .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] },
  53         { .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] },
  54         { }
  55 };
  56
  57 MODULE_DEVICE_TABLE(of, adxl313_of_match);
  58
  59 static int adxl313_i2c_probe(struct i2c_client *client)
  60 {
  61         const struct adxl313_chip_info *chip_data;
  62         struct regmap *regmap;
  63
  64         /*
  65          * Retrieves device specific data as a pointer to a
  66          * adxl313_chip_info structure
  67          */
  68         chip_data = i2c_get_match_data(client);
  69
  70         regmap = devm_regmap_init_i2c(client,
  71                                       &adxl31x_i2c_regmap_config[chip_data->type]);
  72         if (IS_ERR(regmap)) {
  73                 dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
  74                         PTR_ERR(regmap));
  75                 return PTR_ERR(regmap);
  76         }
  77
  78         return adxl313_core_probe(&client->dev, regmap, chip_data, NULL);
  79 }
  80
  81 static struct i2c_driver adxl313_i2c_driver = {
  82         .driver = {
  83                 .name   = "adxl313_i2c",
  84                 .of_match_table = adxl313_of_match,
  85         },
  86         .probe          = adxl313_i2c_probe,
  87         .id_table       = adxl313_i2c_id,
  88 };
  89
  90 module_i2c_driver(adxl313_i2c_driver);
  91
  92 MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
  93 MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer I2C driver");
  94 MODULE_LICENSE("GPL v2");
  95 MODULE_IMPORT_NS("IIO_ADXL313");