1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * ADXL345 3-Axis Digital Accelerometer 4 * 5 * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com> 6 */ 7 8 #ifndef _ADXL345_H_ 9 #define _ADXL345_H_ 10 11 #define ADXL345_REG_DEVID 0x00 12 #define ADXL345_REG_OFSX 0x1E 13 #define ADXL345_REG_OFSY 0x1F 14 #define ADXL345_REG_OFSZ 0x20 15 #define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index)) 16 #define ADXL345_REG_BW_RATE 0x2C 17 #define ADXL345_REG_POWER_CTL 0x2D 18 #define ADXL345_REG_DATA_FORMAT 0x31 19 #define ADXL345_REG_DATAX0 0x32 20 #define ADXL345_REG_DATAY0 0x34 21 #define ADXL345_REG_DATAZ0 0x36 22 #define ADXL345_REG_DATA_AXIS(index) \ 23 (ADXL345_REG_DATAX0 + (index) * sizeof(__le16)) 24 25 #define ADXL345_BW_RATE GENMASK(3, 0) 26 #define ADXL345_BASE_RATE_NANO_HZ 97656250LL 27 28 #define ADXL345_POWER_CTL_MEASURE BIT(3) 29 #define ADXL345_POWER_CTL_STANDBY 0x00 30 31 #define ADXL345_DATA_FORMAT_RANGE GENMASK(1, 0) /* Set the g range */ 32 #define ADXL345_DATA_FORMAT_JUSTIFY BIT(2) /* Left-justified (MSB) mode */ 33 #define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */ 34 #define ADXL345_DATA_FORMAT_SPI_3WIRE BIT(6) /* 3-wire SPI mode */ 35 #define ADXL345_DATA_FORMAT_SELF_TEST BIT(7) /* Enable a self test */ 36 37 #define ADXL345_DATA_FORMAT_2G 0 38 #define ADXL345_DATA_FORMAT_4G 1 39 #define ADXL345_DATA_FORMAT_8G 2 40 #define ADXL345_DATA_FORMAT_16G 3 41 42 #define ADXL345_DEVID 0xE5 43 44 /* 45 * In full-resolution mode, scale factor is maintained at ~4 mg/LSB 46 * in all g ranges. 47 * 48 * At +/- 16g with 13-bit resolution, scale is computed as: 49 * (16 + 16) * 9.81 / (2^13 - 1) = 0.0383 50 */ 51 #define ADXL345_USCALE 38300 52 53 /* 54 * The Datasheet lists a resolution of Resolution is ~49 mg per LSB. That's 55 * ~480mm/s**2 per LSB. 56 */ 57 #define ADXL375_USCALE 480000 58 59 struct adxl345_chip_info { 60 const char *name; 61 int uscale; 62 }; 63 64 int adxl345_core_probe(struct device *dev, struct regmap *regmap, 65 int (*setup)(struct device*, struct regmap*)); 66 67 #endif /* _ADXL345_H_ */ 68