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 0x18 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 { 46 struct adxl367_i2c_state *st; 47 struct regmap *regmap; 48 49 st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL); 50 if (!st) 51 return -ENOMEM; 52 53 regmap = devm_regmap_init_i2c(client, &adxl367_i2c_regmap_config); 54 if (IS_ERR(regmap)) 55 return PTR_ERR(regmap); 56 57 st->regmap = regmap; 58 59 return adxl367_probe(&client->dev, &adxl367_i2c_ops, st, regmap, 60 client->irq); 61 } 62 63 static const struct i2c_device_id adxl367_i2c_id[] = { 64 { "adxl367" }, 65 { } 66 }; 67 MODULE_DEVICE_TABLE(i2c, adxl367_i2c_id); 68 69 static const struct of_device_id adxl367_of_match[] = { 70 { .compatible = "adi,adxl367" }, 71 { }, 72 }; 73 MODULE_DEVICE_TABLE(of, adxl367_of_match); 74 75 static struct i2c_driver adxl367_i2c_driver = { 76 .driver = { 77 .name = "adxl367_i2c", 78 .of_match_table = adxl367_of_match, 79 }, 80 .probe = adxl367_i2c_probe, 81 .id_table = adxl367_i2c_id, 82 }; 83 84 module_i2c_driver(adxl367_i2c_driver); 85 86 MODULE_IMPORT_NS(IIO_ADXL367); 87 MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>"); 88 MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer I2C driver"); 89 MODULE_LICENSE("GPL"); 90