1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * ADXL345 3-Axis Digital Accelerometer SPI driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/module.h>
9*4882a593Smuzhiyun #include <linux/regmap.h>
10*4882a593Smuzhiyun #include <linux/spi/spi.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "adxl345.h"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #define ADXL345_MAX_SPI_FREQ_HZ 5000000
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun static const struct regmap_config adxl345_spi_regmap_config = {
17*4882a593Smuzhiyun .reg_bits = 8,
18*4882a593Smuzhiyun .val_bits = 8,
19*4882a593Smuzhiyun /* Setting bits 7 and 6 enables multiple-byte read */
20*4882a593Smuzhiyun .read_flag_mask = BIT(7) | BIT(6),
21*4882a593Smuzhiyun };
22*4882a593Smuzhiyun
adxl345_spi_probe(struct spi_device * spi)23*4882a593Smuzhiyun static int adxl345_spi_probe(struct spi_device *spi)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun const struct spi_device_id *id = spi_get_device_id(spi);
26*4882a593Smuzhiyun struct regmap *regmap;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun /* Bail out if max_speed_hz exceeds 5 MHz */
29*4882a593Smuzhiyun if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ) {
30*4882a593Smuzhiyun dev_err(&spi->dev, "SPI CLK, %d Hz exceeds 5 MHz\n",
31*4882a593Smuzhiyun spi->max_speed_hz);
32*4882a593Smuzhiyun return -EINVAL;
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config);
36*4882a593Smuzhiyun if (IS_ERR(regmap)) {
37*4882a593Smuzhiyun dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
38*4882a593Smuzhiyun PTR_ERR(regmap));
39*4882a593Smuzhiyun return PTR_ERR(regmap);
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return adxl345_core_probe(&spi->dev, regmap, id->driver_data, id->name);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
adxl345_spi_remove(struct spi_device * spi)45*4882a593Smuzhiyun static int adxl345_spi_remove(struct spi_device *spi)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun return adxl345_core_remove(&spi->dev);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun static const struct spi_device_id adxl345_spi_id[] = {
51*4882a593Smuzhiyun { "adxl345", ADXL345 },
52*4882a593Smuzhiyun { "adxl375", ADXL375 },
53*4882a593Smuzhiyun { }
54*4882a593Smuzhiyun };
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, adxl345_spi_id);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun static const struct of_device_id adxl345_of_match[] = {
59*4882a593Smuzhiyun { .compatible = "adi,adxl345" },
60*4882a593Smuzhiyun { .compatible = "adi,adxl375" },
61*4882a593Smuzhiyun { },
62*4882a593Smuzhiyun };
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, adxl345_of_match);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun static struct spi_driver adxl345_spi_driver = {
67*4882a593Smuzhiyun .driver = {
68*4882a593Smuzhiyun .name = "adxl345_spi",
69*4882a593Smuzhiyun .of_match_table = adxl345_of_match,
70*4882a593Smuzhiyun },
71*4882a593Smuzhiyun .probe = adxl345_spi_probe,
72*4882a593Smuzhiyun .remove = adxl345_spi_remove,
73*4882a593Smuzhiyun .id_table = adxl345_spi_id,
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun module_spi_driver(adxl345_spi_driver);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>");
79*4882a593Smuzhiyun MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver");
80*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
81