| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 3-axis accelerometer driver supporting following Bosch-Sensortec chips: |
| * - BMI088 |
| * |
| * 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 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 = &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); |