1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * ADXL372 3-Axis Digital Accelerometer I2C driver 4 * 5 * Copyright 2018 Analog Devices Inc. 6 */ 7 8 #include <linux/i2c.h> 9 #include <linux/mod_devicetable.h> 10 #include <linux/module.h> 11 #include <linux/regmap.h> 12 13 #include "adxl372.h" 14 15 static const struct regmap_config adxl372_regmap_config = { 16 .reg_bits = 8, 17 .val_bits = 8, 18 .readable_noinc_reg = adxl372_readable_noinc_reg, 19 }; 20 21 static int adxl372_i2c_probe(struct i2c_client *client) 22 { 23 const struct i2c_device_id *id = i2c_client_get_device_id(client); 24 struct regmap *regmap; 25 unsigned int regval; 26 int ret; 27 28 regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config); 29 if (IS_ERR(regmap)) 30 return PTR_ERR(regmap); 31 32 ret = regmap_read(regmap, ADXL372_REVID, ®val); 33 if (ret < 0) 34 return ret; 35 36 /* Starting with the 3rd revision an I2C chip bug was fixed */ 37 if (regval < 3) 38 dev_warn(&client->dev, 39 "I2C might not work properly with other devices on the bus"); 40 41 return adxl372_probe(&client->dev, regmap, client->irq, id->name); 42 } 43 44 static const struct i2c_device_id adxl372_i2c_id[] = { 45 { "adxl372", 0 }, 46 {} 47 }; 48 MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id); 49 50 static const struct of_device_id adxl372_of_match[] = { 51 { .compatible = "adi,adxl372" }, 52 { } 53 }; 54 MODULE_DEVICE_TABLE(of, adxl372_of_match); 55 56 static struct i2c_driver adxl372_i2c_driver = { 57 .driver = { 58 .name = "adxl372_i2c", 59 .of_match_table = adxl372_of_match, 60 }, 61 .probe = adxl372_i2c_probe, 62 .id_table = adxl372_i2c_id, 63 }; 64 65 module_i2c_driver(adxl372_i2c_driver); 66 67 MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>"); 68 MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver"); 69 MODULE_LICENSE("GPL"); 70 MODULE_IMPORT_NS(IIO_ADXL372); 71