68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* ADXL345 3-Axis Digital Accelerometer
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*
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* Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com>
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*/
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#ifndef _ADXL345_H_
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#define _ADXL345_H_
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#define ADXL345_REG_DEVID 0x00
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#define ADXL345_REG_OFSX 0x1E
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#define ADXL345_REG_OFSY 0x1F
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#define ADXL345_REG_OFSZ 0x20
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#define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index))
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#define ADXL345_REG_BW_RATE 0x2C
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#define ADXL345_REG_POWER_CTL 0x2D
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#define ADXL345_REG_DATA_FORMAT 0x31
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#define ADXL345_REG_DATAX0 0x32
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#define ADXL345_REG_DATAY0 0x34
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#define ADXL345_REG_DATAZ0 0x36
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#define ADXL345_REG_DATA_AXIS(index) \
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(ADXL345_REG_DATAX0 + (index) * sizeof(__le16))
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#define ADXL345_BW_RATE GENMASK(3, 0)
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#define ADXL345_BASE_RATE_NANO_HZ 97656250LL
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#define ADXL345_POWER_CTL_MEASURE BIT(3)
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#define ADXL345_POWER_CTL_STANDBY 0x00
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#define ADXL345_DATA_FORMAT_RANGE GENMASK(1, 0) /* Set the g range */
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#define ADXL345_DATA_FORMAT_JUSTIFY BIT(2) /* Left-justified (MSB) mode */
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#define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */
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#define ADXL345_DATA_FORMAT_SPI_3WIRE BIT(6) /* 3-wire SPI mode */
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#define ADXL345_DATA_FORMAT_SELF_TEST BIT(7) /* Enable a self test */
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#define ADXL345_DATA_FORMAT_2G 0
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#define ADXL345_DATA_FORMAT_4G 1
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#define ADXL345_DATA_FORMAT_8G 2
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#define ADXL345_DATA_FORMAT_16G 3
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#define ADXL345_DEVID 0xE5
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/*
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* In full-resolution mode, scale factor is maintained at ~4 mg/LSB
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* in all g ranges.
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*
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* At +/- 16g with 13-bit resolution, scale is computed as:
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* (16 + 16) * 9.81 / (2^13 - 1) = 0.0383
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*/
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#define ADXL345_USCALE 38300
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/*
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* The Datasheet lists a resolution of Resolution is ~49 mg per LSB. That's
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* ~480mm/s**2 per LSB.
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*/
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#define ADXL375_USCALE 480000
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struct adxl345_chip_info {
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const char *name;
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int uscale;
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};
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int adxl345_core_probe(struct device *dev, struct regmap *regmap,
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int (*setup)(struct device*, struct regmap*));
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#endif /* _ADXL345_H_ */
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