1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ADXL313 3-Axis Digital Accelerometer 4 * 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.pdf 8 */ 9 10 #include <linux/i2c.h> 11 #include <linux/mod_devicetable.h> 12 #include <linux/module.h> 13 #include <linux/regmap.h> 14 15 #include "adxl313.h" 16 17 static const struct regmap_config adxl31x_i2c_regmap_config[] = { 18 [ADXL312] = { 19 .reg_bits = 8, 20 .val_bits = 8, 21 .rd_table = &adxl312_readable_regs_table, 22 .wr_table = &adxl312_writable_regs_table, 23 .max_register = 0x39, 24 }, 25 [ADXL313] = { 26 .reg_bits = 8, 27 .val_bits = 8, 28 .rd_table = &adxl313_readable_regs_table, 29 .wr_table = &adxl313_writable_regs_table, 30 .max_register = 0x39, 31 }, 32 [ADXL314] = { 33 .reg_bits = 8, 34 .val_bits = 8, 35 .rd_table = &adxl314_readable_regs_table, 36 .wr_table = &adxl314_writable_regs_table, 37 .max_register = 0x39, 38 }, 39 }; 40 41 static const struct i2c_device_id adxl313_i2c_id[] = { 42 { .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] }, 43 { .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] }, 44 { .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] }, 45 { } 46 }; 47 48 MODULE_DEVICE_TABLE(i2c, adxl313_i2c_id); 49 50 static const struct of_device_id adxl313_of_match[] = { 51 { .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] }, 52 { .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] }, 53 { .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] }, 54 { } 55 }; 56 57 MODULE_DEVICE_TABLE(of, adxl313_of_match); 58 59 static int adxl313_i2c_probe(struct i2c_client *client) 60 { 61 const struct adxl313_chip_info *chip_data; 62 struct regmap *regmap; 63 64 /* 65 * Retrieves device specific data as a pointer to a 66 * adxl313_chip_info structure 67 */ 68 chip_data = device_get_match_data(&client->dev); 69 if (!chip_data) 70 chip_data = (const struct adxl313_chip_info *)i2c_match_id(adxl313_i2c_id, client)->driver_data; 71 72 regmap = devm_regmap_init_i2c(client, 73 &adxl31x_i2c_regmap_config[chip_data->type]); 74 if (IS_ERR(regmap)) { 75 dev_err(&client->dev, "Error initializing i2c regmap: %ld\n", 76 PTR_ERR(regmap)); 77 return PTR_ERR(regmap); 78 } 79 80 return adxl313_core_probe(&client->dev, regmap, chip_data, NULL); 81 } 82 83 static struct i2c_driver adxl313_i2c_driver = { 84 .driver = { 85 .name = "adxl313_i2c", 86 .of_match_table = adxl313_of_match, 87 }, 88 .probe = adxl313_i2c_probe, 89 .id_table = adxl313_i2c_id, 90 }; 91 92 module_i2c_driver(adxl313_i2c_driver); 93 94 MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>"); 95 MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer I2C driver"); 96 MODULE_LICENSE("GPL v2"); 97 MODULE_IMPORT_NS(IIO_ADXL313); 98