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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * ADXL313 3-Axis Digital Accelerometer4 *5 * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>6 *7 * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf8 */9 10#include <linux/mod_devicetable.h>11#include <linux/module.h>12#include <linux/regmap.h>13#include <linux/spi/spi.h>14#include <linux/property.h>15 16#include "adxl313.h"17 18static const struct regmap_config adxl31x_spi_regmap_config[] = {19 [ADXL312] = {20 .reg_bits = 8,21 .val_bits = 8,22 .rd_table = &adxl312_readable_regs_table,23 .wr_table = &adxl312_writable_regs_table,24 .max_register = 0x39,25 /* Setting bits 7 and 6 enables multiple-byte read */26 .read_flag_mask = BIT(7) | BIT(6),27 },28 [ADXL313] = {29 .reg_bits = 8,30 .val_bits = 8,31 .rd_table = &adxl313_readable_regs_table,32 .wr_table = &adxl313_writable_regs_table,33 .max_register = 0x39,34 /* Setting bits 7 and 6 enables multiple-byte read */35 .read_flag_mask = BIT(7) | BIT(6),36 },37 [ADXL314] = {38 .reg_bits = 8,39 .val_bits = 8,40 .rd_table = &adxl314_readable_regs_table,41 .wr_table = &adxl314_writable_regs_table,42 .max_register = 0x39,43 /* Setting bits 7 and 6 enables multiple-byte read */44 .read_flag_mask = BIT(7) | BIT(6),45 },46};47 48static int adxl313_spi_setup(struct device *dev, struct regmap *regmap)49{50 struct spi_device *spi = container_of(dev, struct spi_device, dev);51 int ret;52 53 if (spi->mode & SPI_3WIRE) {54 ret = regmap_write(regmap, ADXL313_REG_DATA_FORMAT,55 ADXL313_SPI_3WIRE);56 if (ret)57 return ret;58 }59 60 return regmap_update_bits(regmap, ADXL313_REG_POWER_CTL,61 ADXL313_I2C_DISABLE, ADXL313_I2C_DISABLE);62}63 64static int adxl313_spi_probe(struct spi_device *spi)65{66 const struct adxl313_chip_info *chip_data;67 struct regmap *regmap;68 int ret;69 70 spi->mode |= SPI_MODE_3;71 ret = spi_setup(spi);72 if (ret)73 return ret;74 75 chip_data = spi_get_device_match_data(spi);76 77 regmap = devm_regmap_init_spi(spi,78 &adxl31x_spi_regmap_config[chip_data->type]);79 80 if (IS_ERR(regmap)) {81 dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",82 PTR_ERR(regmap));83 return PTR_ERR(regmap);84 }85 86 return adxl313_core_probe(&spi->dev, regmap,87 chip_data, &adxl313_spi_setup);88}89 90static const struct spi_device_id adxl313_spi_id[] = {91 { .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },92 { .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL313] },93 { .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL314] },94 { }95};96 97MODULE_DEVICE_TABLE(spi, adxl313_spi_id);98 99static const struct of_device_id adxl313_of_match[] = {100 { .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] },101 { .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] },102 { .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] },103 { }104};105 106MODULE_DEVICE_TABLE(of, adxl313_of_match);107 108static struct spi_driver adxl313_spi_driver = {109 .driver = {110 .name = "adxl313_spi",111 .of_match_table = adxl313_of_match,112 },113 .probe = adxl313_spi_probe,114 .id_table = adxl313_spi_id,115};116 117module_spi_driver(adxl313_spi_driver);118 119MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");120MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer SPI driver");121MODULE_LICENSE("GPL v2");122MODULE_IMPORT_NS(IIO_ADXL313);123