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/* 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
#define BMA400_INT12_MAP_REG 0x23
/* 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
#define BMA400_STEP_INT_MSK BIT(0)
#define BMA400_STEP_RAW_LEN 0x03
#define BMA400_STEP_STAT_MASK GENMASK(9, 8)
/*
* 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
/* Interrupt registers */
#define BMA400_INT_CONFIG0_REG 0x1f
#define BMA400_INT_CONFIG1_REG 0x20
#define BMA400_INT1_MAP_REG 0x21
#define BMA400_INT_IO_CTRL_REG 0x24
#define BMA400_INT_DRDY_MSK BIT(7)
/* 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
/* Generic interrupts register */
#define BMA400_GEN1INT_CONFIG0 0x3f
#define BMA400_GEN2INT_CONFIG0 0x4A
#define BMA400_GEN_CONFIG1_OFF 0x01
#define BMA400_GEN_CONFIG2_OFF 0x02
#define BMA400_GEN_CONFIG3_OFF 0x03
#define BMA400_GEN_CONFIG31_OFF 0x04
#define BMA400_INT_GEN1_MSK BIT(2)
#define BMA400_INT_GEN2_MSK BIT(3)
#define BMA400_GEN_HYST_MSK GENMASK(1, 0)
/*
* BMA400_SCALE_MIN macro value represents m/s^2 for 1 LSB before
* converting to micro values for +-2g range.
*
* For +-2g - 1 LSB = 0.976562 milli g = 0.009576 m/s^2
* For +-4g - 1 LSB = 1.953125 milli g = 0.019153 m/s^2
* For +-16g - 1 LSB = 7.8125 milli g = 0.076614 m/s^2
*
* The raw value which is used to select the different ranges is determined
* by the first bit set position from the scale value, so BMA400_SCALE_MIN
* should be odd.
*
* Scale values for +-2g, +-4g, +-8g and +-16g are populated into bma400_scales
* array by left shifting BMA400_SCALE_MIN.
* e.g.:
* To select +-2g = 9577 << 0 = raw value to write is 0.
* To select +-8g = 9577 << 2 = raw value to write is 2.
* To select +-16g = 9577 << 3 = raw value to write is 3.
*/
#define BMA400_SCALE_MIN 9577
#define BMA400_SCALE_MAX 76617
#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, int irq,
const char *name);
#endif
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