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
 17static 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		.volatile_reg	= adxl313_is_volatile_reg,
 25		.cache_type	= REGCACHE_MAPLE,
 26	},
 27	[ADXL313] = {
 28		.reg_bits	= 8,
 29		.val_bits	= 8,
 30		.rd_table	= &adxl313_readable_regs_table,
 31		.wr_table	= &adxl313_writable_regs_table,
 32		.max_register	= 0x39,
 33		.volatile_reg	= adxl313_is_volatile_reg,
 34		.cache_type	= REGCACHE_MAPLE,
 35	},
 36	[ADXL314] = {
 37		.reg_bits	= 8,
 38		.val_bits	= 8,
 39		.rd_table	= &adxl314_readable_regs_table,
 40		.wr_table	= &adxl314_writable_regs_table,
 41		.max_register	= 0x39,
 42		.volatile_reg	= adxl313_is_volatile_reg,
 43		.cache_type	= REGCACHE_MAPLE,
 44	},
 45};
 46
 47static const struct i2c_device_id adxl313_i2c_id[] = {
 48	{ .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },
 49	{ .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL313] },
 50	{ .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL314] },
 51	{ }
 52};
 53
 54MODULE_DEVICE_TABLE(i2c, adxl313_i2c_id);
 55
 56static const struct of_device_id adxl313_of_match[] = {
 57	{ .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] },
 58	{ .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] },
 59	{ .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] },
 60	{ }
 61};
 62
 63MODULE_DEVICE_TABLE(of, adxl313_of_match);
 64
 65static int adxl313_i2c_probe(struct i2c_client *client)
 66{
 67	const struct adxl313_chip_info *chip_data;
 68	struct regmap *regmap;
 69
 70	/*
 71	 * Retrieves device specific data as a pointer to a
 72	 * adxl313_chip_info structure
 73	 */
 74	chip_data = i2c_get_match_data(client);
 75
 76	regmap = devm_regmap_init_i2c(client,
 77				      &adxl31x_i2c_regmap_config[chip_data->type]);
 78	if (IS_ERR(regmap)) {
 79		dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
 80			PTR_ERR(regmap));
 81		return PTR_ERR(regmap);
 82	}
 83
 84	return adxl313_core_probe(&client->dev, regmap, chip_data, NULL);
 85}
 86
 87static struct i2c_driver adxl313_i2c_driver = {
 88	.driver = {
 89		.name	= "adxl313_i2c",
 90		.of_match_table = adxl313_of_match,
 91	},
 92	.probe		= adxl313_i2c_probe,
 93	.id_table	= adxl313_i2c_id,
 94};
 95
 96module_i2c_driver(adxl313_i2c_driver);
 97
 98MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
 99MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer I2C driver");
100MODULE_LICENSE("GPL v2");
101MODULE_IMPORT_NS("IIO_ADXL313");