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[ADXL312] },
44 { .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },
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
adxl313_i2c_probe(struct i2c_client * client)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 = device_get_match_data(&client->dev);
69 if (!chip_data)
70 chip_data = (const struct adxl313_chip_info *)i2c_match_id(adxl313_i2c_id, client)->driver_data;
71
72 regmap = devm_regmap_init_i2c(client,
73 &adxl31x_i2c_regmap_config[chip_data->type]);
74 if (IS_ERR(regmap)) {
75 dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
76 PTR_ERR(regmap));
77 return PTR_ERR(regmap);
78 }
79
80 return adxl313_core_probe(&client->dev, regmap, chip_data, NULL);
81 }
82
83 static struct i2c_driver adxl313_i2c_driver = {
84 .driver = {
85 .name = "adxl313_i2c",
86 .of_match_table = adxl313_of_match,
87 },
88 .probe_new = adxl313_i2c_probe,
89 .id_table = adxl313_i2c_id,
90 };
91
92 module_i2c_driver(adxl313_i2c_driver);
93
94 MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
95 MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer I2C driver");
96 MODULE_LICENSE("GPL v2");
97 MODULE_IMPORT_NS(IIO_ADXL313);
98