1 // SPDX-License-Identifier: GPL-2.0
3 * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
6 * Copyright (c) 2018-2020, Topic Embedded Products
9 #include <linux/module.h>
10 #include <linux/regmap.h>
11 #include <linux/slab.h>
12 #include <linux/spi/spi.h>
14 #include "bmi088-accel.h"
16 static int bmi088_regmap_spi_write(void *context, const void *data, size_t count)
18 struct spi_device *spi = context;
20 /* Write register is same as generic SPI */
21 return spi_write(spi, data, count);
24 static int bmi088_regmap_spi_read(void *context, const void *reg,
25 size_t reg_size, void *val, size_t val_size)
27 struct spi_device *spi = context;
31 addr[0] |= BIT(7); /* Set RW = '1' */
32 addr[1] = 0; /* Read requires a dummy byte transfer */
34 return spi_write_then_read(spi, addr, sizeof(addr), val, val_size);
37 static struct regmap_bus bmi088_regmap_bus = {
38 .write = bmi088_regmap_spi_write,
39 .read = bmi088_regmap_spi_read,
42 static int bmi088_accel_probe(struct spi_device *spi)
44 struct regmap *regmap;
45 const struct spi_device_id *id = spi_get_device_id(spi);
47 regmap = devm_regmap_init(&spi->dev, &bmi088_regmap_bus,
48 spi, &bmi088_regmap_conf);
51 dev_err(&spi->dev, "Failed to initialize spi regmap\n");
52 return PTR_ERR(regmap);
55 return bmi088_accel_core_probe(&spi->dev, regmap, spi->irq, id->name,
59 static int bmi088_accel_remove(struct spi_device *spi)
61 return bmi088_accel_core_remove(&spi->dev);
64 static const struct spi_device_id bmi088_accel_id[] = {
68 MODULE_DEVICE_TABLE(spi, bmi088_accel_id);
70 static struct spi_driver bmi088_accel_driver = {
72 .name = "bmi088_accel_spi",
73 .pm = &bmi088_accel_pm_ops,
75 .probe = bmi088_accel_probe,
76 .remove = bmi088_accel_remove,
77 .id_table = bmi088_accel_id,
79 module_spi_driver(bmi088_accel_driver);
81 MODULE_AUTHOR("Niek van Agt <niek.van.agt@topicproducts.com>");
82 MODULE_LICENSE("GPL v2");
83 MODULE_DESCRIPTION("BMI088 accelerometer driver (SPI)");