xref: /linux/drivers/iio/accel/adxl345_i2c.c (revision c26f4fbd58375bd6ef74f95eb73d61762ad97c59)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ADXL345 3-Axis Digital Accelerometer I2C driver
4  *
5  * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
6  *
7  * 7-bit I2C slave address: 0x1D (ALT ADDRESS pin tied to VDDIO) or
8  * 0x53 (ALT ADDRESS pin grounded)
9  */
10 
11 #include <linux/i2c.h>
12 #include <linux/module.h>
13 #include <linux/regmap.h>
14 
15 #include "adxl345.h"
16 
17 static const struct regmap_config adxl345_i2c_regmap_config = {
18 	.reg_bits = 8,
19 	.val_bits = 8,
20 	.volatile_reg = adxl345_is_volatile_reg,
21 	.cache_type = REGCACHE_MAPLE,
22 };
23 
adxl345_i2c_probe(struct i2c_client * client)24 static int adxl345_i2c_probe(struct i2c_client *client)
25 {
26 	struct regmap *regmap;
27 
28 	regmap = devm_regmap_init_i2c(client, &adxl345_i2c_regmap_config);
29 	if (IS_ERR(regmap))
30 		return dev_err_probe(&client->dev, PTR_ERR(regmap), "Error initializing regmap\n");
31 
32 	return adxl345_core_probe(&client->dev, regmap, false, NULL);
33 }
34 
35 static const struct adxl345_chip_info adxl345_i2c_info = {
36 	.name = "adxl345",
37 	.uscale = ADXL345_USCALE,
38 };
39 
40 static const struct adxl345_chip_info adxl375_i2c_info = {
41 	.name = "adxl375",
42 	.uscale = ADXL375_USCALE,
43 };
44 
45 static const struct i2c_device_id adxl345_i2c_id[] = {
46 	{ "adxl345", (kernel_ulong_t)&adxl345_i2c_info },
47 	{ "adxl375", (kernel_ulong_t)&adxl375_i2c_info },
48 	{ }
49 };
50 MODULE_DEVICE_TABLE(i2c, adxl345_i2c_id);
51 
52 static const struct of_device_id adxl345_of_match[] = {
53 	{ .compatible = "adi,adxl345", .data = &adxl345_i2c_info },
54 	{ .compatible = "adi,adxl375", .data = &adxl375_i2c_info },
55 	{ }
56 };
57 MODULE_DEVICE_TABLE(of, adxl345_of_match);
58 
59 static const struct acpi_device_id adxl345_acpi_match[] = {
60 	{ "ADS0345", (kernel_ulong_t)&adxl345_i2c_info },
61 	{ }
62 };
63 MODULE_DEVICE_TABLE(acpi, adxl345_acpi_match);
64 
65 static struct i2c_driver adxl345_i2c_driver = {
66 	.driver = {
67 		.name	= "adxl345_i2c",
68 		.of_match_table = adxl345_of_match,
69 		.acpi_match_table = adxl345_acpi_match,
70 	},
71 	.probe		= adxl345_i2c_probe,
72 	.id_table	= adxl345_i2c_id,
73 };
74 module_i2c_driver(adxl345_i2c_driver);
75 
76 MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
77 MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer I2C driver");
78 MODULE_LICENSE("GPL v2");
79 MODULE_IMPORT_NS("IIO_ADXL345");
80