| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * ADXL313 3-Axis Digital Accelerometer |
| * |
| * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com> |
| * |
| * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf |
| */ |
| |
| #include <linux/mod_devicetable.h> |
| #include <linux/module.h> |
| #include <linux/regmap.h> |
| #include <linux/spi/spi.h> |
| |
| #include "adxl313.h" |
| |
| static const struct regmap_config adxl313_spi_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| .rd_table = &adxl313_readable_regs_table, |
| .wr_table = &adxl313_writable_regs_table, |
| .max_register = 0x39, |
| /* Setting bits 7 and 6 enables multiple-byte read */ |
| .read_flag_mask = BIT(7) | BIT(6), |
| }; |
| |
| static int adxl313_spi_setup(struct device *dev, struct regmap *regmap) |
| { |
| struct spi_device *spi = container_of(dev, struct spi_device, dev); |
| int ret; |
| |
| if (spi->mode & SPI_3WIRE) { |
| ret = regmap_write(regmap, ADXL313_REG_DATA_FORMAT, |
| ADXL313_SPI_3WIRE); |
| if (ret) |
| return ret; |
| } |
| |
| return regmap_update_bits(regmap, ADXL313_REG_POWER_CTL, |
| ADXL313_I2C_DISABLE, ADXL313_I2C_DISABLE); |
| } |
| |
| static int adxl313_spi_probe(struct spi_device *spi) |
| { |
| const struct spi_device_id *id = spi_get_device_id(spi); |
| struct regmap *regmap; |
| int ret; |
| |
| spi->mode |= SPI_MODE_3; |
| ret = spi_setup(spi); |
| if (ret) |
| return ret; |
| |
| regmap = devm_regmap_init_spi(spi, &adxl313_spi_regmap_config); |
| if (IS_ERR(regmap)) { |
| dev_err(&spi->dev, "Error initializing spi regmap: %ld\n", |
| PTR_ERR(regmap)); |
| return PTR_ERR(regmap); |
| } |
| |
| return adxl313_core_probe(&spi->dev, regmap, id->name, |
| &adxl313_spi_setup); |
| } |
| |
| static const struct spi_device_id adxl313_spi_id[] = { |
| { "adxl313" }, |
| { } |
| }; |
| |
| MODULE_DEVICE_TABLE(spi, adxl313_spi_id); |
| |
| static const struct of_device_id adxl313_of_match[] = { |
| { .compatible = "adi,adxl313" }, |
| { } |
| }; |
| |
| MODULE_DEVICE_TABLE(of, adxl313_of_match); |
| |
| static struct spi_driver adxl313_spi_driver = { |
| .driver = { |
| .name = "adxl313_spi", |
| .of_match_table = adxl313_of_match, |
| }, |
| .probe = adxl313_spi_probe, |
| .id_table = adxl313_spi_id, |
| }; |
| |
| module_spi_driver(adxl313_spi_driver); |
| |
| MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>"); |
| MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer SPI driver"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_IMPORT_NS(IIO_ADXL313); |