1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ADXL355 3-Axis Digital Accelerometer SPI driver 4 * 5 * Copyright (c) 2021 Puranjay Mohan <puranjay12@gmail.com> 6 */ 7 8 #include <linux/module.h> 9 #include <linux/mod_devicetable.h> 10 #include <linux/regmap.h> 11 #include <linux/spi/spi.h> 12 #include <linux/property.h> 13 14 #include "adxl355.h" 15 16 static const struct regmap_config adxl355_spi_regmap_config = { 17 .reg_bits = 7, 18 .pad_bits = 1, 19 .val_bits = 8, 20 .read_flag_mask = BIT(0), 21 .max_register = 0x2F, 22 .rd_table = &adxl355_readable_regs_tbl, 23 .wr_table = &adxl355_writeable_regs_tbl, 24 }; 25 26 static int adxl355_spi_probe(struct spi_device *spi) 27 { 28 const struct adxl355_chip_info *chip_data; 29 struct regmap *regmap; 30 31 chip_data = device_get_match_data(&spi->dev); 32 if (!chip_data) { 33 chip_data = (void *)spi_get_device_id(spi)->driver_data; 34 35 if (!chip_data) 36 return -EINVAL; 37 } 38 39 regmap = devm_regmap_init_spi(spi, &adxl355_spi_regmap_config); 40 if (IS_ERR(regmap)) { 41 dev_err(&spi->dev, "Error initializing spi regmap: %ld\n", 42 PTR_ERR(regmap)); 43 44 return PTR_ERR(regmap); 45 } 46 47 return adxl355_core_probe(&spi->dev, regmap, chip_data); 48 } 49 50 static const struct spi_device_id adxl355_spi_id[] = { 51 { "adxl355", (kernel_ulong_t)&adxl35x_chip_info[ADXL355] }, 52 { "adxl359", (kernel_ulong_t)&adxl35x_chip_info[ADXL359] }, 53 { } 54 }; 55 MODULE_DEVICE_TABLE(spi, adxl355_spi_id); 56 57 static const struct of_device_id adxl355_of_match[] = { 58 { .compatible = "adi,adxl355", .data = &adxl35x_chip_info[ADXL355] }, 59 { .compatible = "adi,adxl359", .data = &adxl35x_chip_info[ADXL359] }, 60 { } 61 }; 62 MODULE_DEVICE_TABLE(of, adxl355_of_match); 63 64 static struct spi_driver adxl355_spi_driver = { 65 .driver = { 66 .name = "adxl355_spi", 67 .of_match_table = adxl355_of_match, 68 }, 69 .probe = adxl355_spi_probe, 70 .id_table = adxl355_spi_id, 71 }; 72 module_spi_driver(adxl355_spi_driver); 73 74 MODULE_AUTHOR("Puranjay Mohan <puranjay12@gmail.com>"); 75 MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer SPI driver"); 76 MODULE_LICENSE("GPL v2"); 77 MODULE_IMPORT_NS(IIO_ADXL355); 78