1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* ADXL345 3-Axis Digital Accelerometer SPI driver
*
* Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
*/
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include "adxl345.h"
#define ADXL345_MAX_SPI_FREQ_HZ 5000000
static const struct regmap_config adxl345_spi_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
/* Setting bits 7 and 6 enables multiple-byte read */
.read_flag_mask = BIT(7) | BIT(6),
};
static int adxl345_spi_probe(struct spi_device *spi)
{
struct regmap *regmap;
/* Bail out if max_speed_hz exceeds 5 MHz */
if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ)
return dev_err_probe(&spi->dev, -EINVAL, "SPI CLK, %d Hz exceeds 5 MHz\n",
spi->max_speed_hz);
regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(&spi->dev, PTR_ERR(regmap), "Error initializing regmap\n");
return adxl345_core_probe(&spi->dev, regmap);
}
static const struct spi_device_id adxl345_spi_id[] = {
{ "adxl345", ADXL345 },
{ "adxl375", ADXL375 },
{ }
};
MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
static const struct of_device_id adxl345_of_match[] = {
{ .compatible = "adi,adxl345", .data = (const void *)ADXL345 },
{ .compatible = "adi,adxl375", .data = (const void *)ADXL375 },
{ }
};
MODULE_DEVICE_TABLE(of, adxl345_of_match);
static const struct acpi_device_id adxl345_acpi_match[] = {
{ "ADS0345", ADXL345 },
{ }
};
MODULE_DEVICE_TABLE(acpi, adxl345_acpi_match);
static struct spi_driver adxl345_spi_driver = {
.driver = {
.name = "adxl345_spi",
.of_match_table = adxl345_of_match,
.acpi_match_table = adxl345_acpi_match,
},
.probe = adxl345_spi_probe,
.id_table = adxl345_spi_id,
};
module_spi_driver(adxl345_spi_driver);
MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS(IIO_ADXL345);
|
