1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2021 Analog Devices, Inc. 4 * Author: Cosmin Tanislav <cosmin.tanislav@analog.com> 5 */ 6 7 #include <linux/i2c.h> 8 #include <linux/mod_devicetable.h> 9 #include <linux/module.h> 10 #include <linux/regmap.h> 11 12 #include "adxl367.h" 13 14 #define ADXL367_I2C_FIFO_DATA 0x42 15 16 struct adxl367_i2c_state { 17 struct regmap *regmap; 18 }; 19 20 static bool adxl367_readable_noinc_reg(struct device *dev, unsigned int reg) 21 { 22 return reg == ADXL367_I2C_FIFO_DATA; 23 } 24 25 static int adxl367_i2c_read_fifo(void *context, __be16 *fifo_buf, 26 unsigned int fifo_entries) 27 { 28 struct adxl367_i2c_state *st = context; 29 30 return regmap_noinc_read(st->regmap, ADXL367_I2C_FIFO_DATA, fifo_buf, 31 fifo_entries * sizeof(*fifo_buf)); 32 } 33 34 static const struct regmap_config adxl367_i2c_regmap_config = { 35 .reg_bits = 8, 36 .val_bits = 8, 37 .readable_noinc_reg = adxl367_readable_noinc_reg, 38 }; 39 40 static const struct adxl367_ops adxl367_i2c_ops = { 41 .read_fifo = adxl367_i2c_read_fifo, 42 }; 43 44 static int adxl367_i2c_probe(struct i2c_client *client, 45 const struct i2c_device_id *id) 46 { 47 struct adxl367_i2c_state *st; 48 struct regmap *regmap; 49 50 st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL); 51 if (!st) 52 return -ENOMEM; 53 54 regmap = devm_regmap_init_i2c(client, &adxl367_i2c_regmap_config); 55 if (IS_ERR(regmap)) 56 return PTR_ERR(regmap); 57 58 st->regmap = regmap; 59 60 return adxl367_probe(&client->dev, &adxl367_i2c_ops, st, regmap, 61 client->irq); 62 } 63 64 static const struct i2c_device_id adxl367_i2c_id[] = { 65 { "adxl367", 0 }, 66 { }, 67 }; 68 MODULE_DEVICE_TABLE(i2c, adxl367_i2c_id); 69 70 static const struct of_device_id adxl367_of_match[] = { 71 { .compatible = "adi,adxl367" }, 72 { }, 73 }; 74 MODULE_DEVICE_TABLE(of, adxl367_of_match); 75 76 static struct i2c_driver adxl367_i2c_driver = { 77 .driver = { 78 .name = "adxl367_i2c", 79 .of_match_table = adxl367_of_match, 80 }, 81 .probe = adxl367_i2c_probe, 82 .id_table = adxl367_i2c_id, 83 }; 84 85 module_i2c_driver(adxl367_i2c_driver); 86 87 MODULE_IMPORT_NS(IIO_ADXL367); 88 MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>"); 89 MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer I2C driver"); 90 MODULE_LICENSE("GPL"); 91