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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// SPDX-License-Identifier: GPL-2.0
/*
* 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
* - BMI088
* - BMI085
* - BMI090L
*
* Copyright (c) 2018-2020, Topic Embedded Products
*/
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include "bmi088-accel.h"
static int bmi088_regmap_spi_write(void *context, const void *data, size_t count)
{
struct spi_device *spi = context;
/* Write register is same as generic SPI */
return spi_write(spi, data, count);
}
static int bmi088_regmap_spi_read(void *context, const void *reg,
size_t reg_size, void *val, size_t val_size)
{
struct spi_device *spi = context;
u8 addr[2];
addr[0] = *(u8 *)reg;
addr[0] |= BIT(7); /* Set RW = '1' */
addr[1] = 0; /* Read requires a dummy byte transfer */
return spi_write_then_read(spi, addr, sizeof(addr), val, val_size);
}
static const struct regmap_bus bmi088_regmap_bus = {
.write = bmi088_regmap_spi_write,
.read = bmi088_regmap_spi_read,
};
static int bmi088_accel_probe(struct spi_device *spi)
{
struct regmap *regmap;
const struct spi_device_id *id = spi_get_device_id(spi);
regmap = devm_regmap_init(&spi->dev, &bmi088_regmap_bus,
spi, &bmi088_regmap_conf);
if (IS_ERR(regmap)) {
dev_err(&spi->dev, "Failed to initialize spi regmap\n");
return PTR_ERR(regmap);
}
return bmi088_accel_core_probe(&spi->dev, regmap, spi->irq,
id->driver_data);
}
static void bmi088_accel_remove(struct spi_device *spi)
{
bmi088_accel_core_remove(&spi->dev);
}
static const struct of_device_id bmi088_of_match[] = {
{ .compatible = "bosch,bmi085-accel" },
{ .compatible = "bosch,bmi088-accel" },
{ .compatible = "bosch,bmi090l-accel" },
{}
};
MODULE_DEVICE_TABLE(of, bmi088_of_match);
static const struct spi_device_id bmi088_accel_id[] = {
{"bmi085-accel", BOSCH_BMI085},
{"bmi088-accel", BOSCH_BMI088},
{"bmi090l-accel", BOSCH_BMI090L},
{}
};
MODULE_DEVICE_TABLE(spi, bmi088_accel_id);
static struct spi_driver bmi088_accel_driver = {
.driver = {
.name = "bmi088_accel_spi",
.pm = pm_ptr(&bmi088_accel_pm_ops),
.of_match_table = bmi088_of_match,
},
.probe = bmi088_accel_probe,
.remove = bmi088_accel_remove,
.id_table = bmi088_accel_id,
};
module_spi_driver(bmi088_accel_driver);
MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("BMI088 accelerometer driver (SPI)");
MODULE_IMPORT_NS("IIO_BMI088");
|
