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