1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ADXL355 3-Axis Digital Accelerometer I2C driver 4 * 5 * Copyright (c) 2021 Puranjay Mohan <puranjay12@gmail.com> 6 */ 7 8 #include <linux/i2c.h> 9 #include <linux/module.h> 10 #include <linux/mod_devicetable.h> 11 #include <linux/regmap.h> 12 13 #include "adxl355.h" 14 15 static const struct regmap_config adxl355_i2c_regmap_config = { 16 .reg_bits = 8, 17 .val_bits = 8, 18 .max_register = 0x2F, 19 .rd_table = &adxl355_readable_regs_tbl, 20 .wr_table = &adxl355_writeable_regs_tbl, 21 }; 22 23 static int adxl355_i2c_probe(struct i2c_client *client) 24 { 25 struct regmap *regmap; 26 const struct adxl355_chip_info *chip_data; 27 const struct i2c_device_id *adxl355; 28 29 chip_data = device_get_match_data(&client->dev); 30 if (!chip_data) { 31 adxl355 = to_i2c_driver(client->dev.driver)->id_table; 32 if (!adxl355) 33 return -EINVAL; 34 35 chip_data = (void *)i2c_match_id(adxl355, client)->driver_data; 36 37 if (!chip_data) 38 return -EINVAL; 39 } 40 41 regmap = devm_regmap_init_i2c(client, &adxl355_i2c_regmap_config); 42 if (IS_ERR(regmap)) { 43 dev_err(&client->dev, "Error initializing i2c regmap: %ld\n", 44 PTR_ERR(regmap)); 45 46 return PTR_ERR(regmap); 47 } 48 49 return adxl355_core_probe(&client->dev, regmap, chip_data); 50 } 51 52 static const struct i2c_device_id adxl355_i2c_id[] = { 53 { "adxl355", (kernel_ulong_t)&adxl35x_chip_info[ADXL355] }, 54 { "adxl359", (kernel_ulong_t)&adxl35x_chip_info[ADXL359] }, 55 { } 56 }; 57 MODULE_DEVICE_TABLE(i2c, adxl355_i2c_id); 58 59 static const struct of_device_id adxl355_of_match[] = { 60 { .compatible = "adi,adxl355", .data = &adxl35x_chip_info[ADXL355] }, 61 { .compatible = "adi,adxl359", .data = &adxl35x_chip_info[ADXL359] }, 62 { } 63 }; 64 MODULE_DEVICE_TABLE(of, adxl355_of_match); 65 66 static struct i2c_driver adxl355_i2c_driver = { 67 .driver = { 68 .name = "adxl355_i2c", 69 .of_match_table = adxl355_of_match, 70 }, 71 .probe_new = adxl355_i2c_probe, 72 .id_table = adxl355_i2c_id, 73 }; 74 module_i2c_driver(adxl355_i2c_driver); 75 76 MODULE_AUTHOR("Puranjay Mohan <puranjay12@gmail.com>"); 77 MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer I2C driver"); 78 MODULE_LICENSE("GPL v2"); 79 MODULE_IMPORT_NS(IIO_ADXL355); 80