1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * ADXL371/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 adxl372_chip_info *chip_info; 24 struct regmap *regmap; 25 unsigned int regval; 26 int ret; 27 28 chip_info = i2c_get_match_data(client); 29 30 regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config); 31 if (IS_ERR(regmap)) 32 return PTR_ERR(regmap); 33 34 ret = regmap_read(regmap, ADXL372_REVID, ®val); 35 if (ret < 0) 36 return ret; 37 38 /* Starting with the 3rd revision an I2C chip bug was fixed */ 39 if (regval < 3) 40 dev_warn(&client->dev, 41 "I2C might not work properly with other devices on the bus"); 42 43 return adxl372_probe(&client->dev, regmap, client->irq, chip_info); 44 } 45 46 static const struct i2c_device_id adxl372_i2c_id[] = { 47 { "adxl371", (kernel_ulong_t)&adxl371_chip_info }, 48 { "adxl372", (kernel_ulong_t)&adxl372_chip_info }, 49 { } 50 }; 51 MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id); 52 53 static const struct of_device_id adxl372_of_match[] = { 54 { .compatible = "adi,adxl371", .data = &adxl371_chip_info }, 55 { .compatible = "adi,adxl372", .data = &adxl372_chip_info }, 56 { } 57 }; 58 MODULE_DEVICE_TABLE(of, adxl372_of_match); 59 60 static struct i2c_driver adxl372_i2c_driver = { 61 .driver = { 62 .name = "adxl372_i2c", 63 .of_match_table = adxl372_of_match, 64 }, 65 .probe = adxl372_i2c_probe, 66 .id_table = adxl372_i2c_id, 67 }; 68 69 module_i2c_driver(adxl372_i2c_driver); 70 71 MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>"); 72 MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com>"); 73 MODULE_DESCRIPTION("Analog Devices ADXL371/ADXL372 3-axis accelerometer I2C driver"); 74 MODULE_LICENSE("GPL"); 75 MODULE_IMPORT_NS("IIO_ADXL372"); 76