Contributors: 1
Author Tokens Token Proportion Commits Commit Proportion
Dan Robertson 252 100.00% 2 100.00%
Total 252 2 


/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Register constants and other forward declarations needed by the bma400
 * sources.
 *
 * Copyright 2019 Dan Robertson <dan@dlrobertson.com>
 */

#ifndef _BMA400_H_
#define _BMA400_H_

#include <linux/bits.h>
#include <linux/regmap.h>

/*
 * Read-Only Registers
 */

/* Status and ID registers */
#define BMA400_CHIP_ID_REG          0x00
#define BMA400_ERR_REG              0x02
#define BMA400_STATUS_REG           0x03

/* Acceleration registers */
#define BMA400_X_AXIS_LSB_REG       0x04
#define BMA400_X_AXIS_MSB_REG       0x05
#define BMA400_Y_AXIS_LSB_REG       0x06
#define BMA400_Y_AXIS_MSB_REG       0x07
#define BMA400_Z_AXIS_LSB_REG       0x08
#define BMA400_Z_AXIS_MSB_REG       0x09

/* Sensor time registers */
#define BMA400_SENSOR_TIME0         0x0a
#define BMA400_SENSOR_TIME1         0x0b
#define BMA400_SENSOR_TIME2         0x0c

/* Event and interrupt registers */
#define BMA400_EVENT_REG            0x0d
#define BMA400_INT_STAT0_REG        0x0e
#define BMA400_INT_STAT1_REG        0x0f
#define BMA400_INT_STAT2_REG        0x10

/* Temperature register */
#define BMA400_TEMP_DATA_REG        0x11

/* FIFO length and data registers */
#define BMA400_FIFO_LENGTH0_REG     0x12
#define BMA400_FIFO_LENGTH1_REG     0x13
#define BMA400_FIFO_DATA_REG        0x14

/* Step count registers */
#define BMA400_STEP_CNT0_REG        0x15
#define BMA400_STEP_CNT1_REG        0x16
#define BMA400_STEP_CNT3_REG        0x17
#define BMA400_STEP_STAT_REG        0x18

/*
 * Read-write configuration registers
 */
#define BMA400_ACC_CONFIG0_REG      0x19
#define BMA400_ACC_CONFIG1_REG      0x1a
#define BMA400_ACC_CONFIG2_REG      0x1b
#define BMA400_CMD_REG              0x7e

/* Chip ID of BMA 400 devices found in the chip ID register. */
#define BMA400_ID_REG_VAL           0x90

#define BMA400_LP_OSR_SHIFT         5
#define BMA400_NP_OSR_SHIFT         4
#define BMA400_SCALE_SHIFT          6

#define BMA400_TWO_BITS_MASK        GENMASK(1, 0)
#define BMA400_LP_OSR_MASK          GENMASK(6, 5)
#define BMA400_NP_OSR_MASK          GENMASK(5, 4)
#define BMA400_ACC_ODR_MASK         GENMASK(3, 0)
#define BMA400_ACC_SCALE_MASK       GENMASK(7, 6)

#define BMA400_ACC_ODR_MIN_RAW      0x05
#define BMA400_ACC_ODR_LP_RAW       0x06
#define BMA400_ACC_ODR_MAX_RAW      0x0b

#define BMA400_ACC_ODR_MAX_HZ       800
#define BMA400_ACC_ODR_MIN_WHOLE_HZ 25
#define BMA400_ACC_ODR_MIN_HZ       12

#define BMA400_SCALE_MIN            38357
#define BMA400_SCALE_MAX            306864

#define BMA400_NUM_REGULATORS       2
#define BMA400_VDD_REGULATOR        0
#define BMA400_VDDIO_REGULATOR      1

extern const struct regmap_config bma400_regmap_config;

int bma400_probe(struct device *dev, struct regmap *regmap, const char *name);

int bma400_remove(struct device *dev);

#endif