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