drivers/iio/accel/bma400.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Register constants and other forward declarations needed by the bma400
   4  * sources.
   5  *
   6  * Copyright 2019 Dan Robertson <dan@dlrobertson.com>
   7  */
   8
   9 #ifndef _BMA400_H_
  10 #define _BMA400_H_
  11
  12 #include <linux/bits.h>
  13 #include <linux/regmap.h>
  14
  15 /*
  16  * Read-Only Registers
  17  */
  18
  19 /* Status and ID registers */
  20 #define BMA400_CHIP_ID_REG          0x00
  21 #define BMA400_ERR_REG              0x02
  22 #define BMA400_STATUS_REG           0x03
  23
  24 /* Acceleration registers */
  25 #define BMA400_X_AXIS_LSB_REG       0x04
  26 #define BMA400_X_AXIS_MSB_REG       0x05
  27 #define BMA400_Y_AXIS_LSB_REG       0x06
  28 #define BMA400_Y_AXIS_MSB_REG       0x07
  29 #define BMA400_Z_AXIS_LSB_REG       0x08
  30 #define BMA400_Z_AXIS_MSB_REG       0x09
  31
  32 /* Sensor time registers */
  33 #define BMA400_SENSOR_TIME0         0x0a
  34 #define BMA400_SENSOR_TIME1         0x0b
  35 #define BMA400_SENSOR_TIME2         0x0c
  36
  37 /* Event and interrupt registers */
  38 #define BMA400_EVENT_REG            0x0d
  39 #define BMA400_INT_STAT0_REG        0x0e
  40 #define BMA400_INT_STAT1_REG        0x0f
  41 #define BMA400_INT_STAT2_REG        0x10
  42
  43 /* Temperature register */
  44 #define BMA400_TEMP_DATA_REG        0x11
  45
  46 /* FIFO length and data registers */
  47 #define BMA400_FIFO_LENGTH0_REG     0x12
  48 #define BMA400_FIFO_LENGTH1_REG     0x13
  49 #define BMA400_FIFO_DATA_REG        0x14
  50
  51 /* Step count registers */
  52 #define BMA400_STEP_CNT0_REG        0x15
  53 #define BMA400_STEP_CNT1_REG        0x16
  54 #define BMA400_STEP_CNT3_REG        0x17
  55 #define BMA400_STEP_STAT_REG        0x18
  56
  57 /*
  58  * Read-write configuration registers
  59  */
  60 #define BMA400_ACC_CONFIG0_REG      0x19
  61 #define BMA400_ACC_CONFIG1_REG      0x1a
  62 #define BMA400_ACC_CONFIG2_REG      0x1b
  63 #define BMA400_CMD_REG              0x7e
  64
  65 /* Chip ID of BMA 400 devices found in the chip ID register. */
  66 #define BMA400_ID_REG_VAL           0x90
  67
  68 #define BMA400_LP_OSR_SHIFT         5
  69 #define BMA400_NP_OSR_SHIFT         4
  70 #define BMA400_SCALE_SHIFT          6
  71
  72 #define BMA400_TWO_BITS_MASK        GENMASK(1, 0)
  73 #define BMA400_LP_OSR_MASK          GENMASK(6, 5)
  74 #define BMA400_NP_OSR_MASK          GENMASK(5, 4)
  75 #define BMA400_ACC_ODR_MASK         GENMASK(3, 0)
  76 #define BMA400_ACC_SCALE_MASK       GENMASK(7, 6)
  77
  78 #define BMA400_ACC_ODR_MIN_RAW      0x05
  79 #define BMA400_ACC_ODR_LP_RAW       0x06
  80 #define BMA400_ACC_ODR_MAX_RAW      0x0b
  81
  82 #define BMA400_ACC_ODR_MAX_HZ       800
  83 #define BMA400_ACC_ODR_MIN_WHOLE_HZ 25
  84 #define BMA400_ACC_ODR_MIN_HZ       12
  85
  86 #define BMA400_SCALE_MIN            38357
  87 #define BMA400_SCALE_MAX            306864
  88
  89 #define BMA400_NUM_REGULATORS       2
  90 #define BMA400_VDD_REGULATOR        0
  91 #define BMA400_VDDIO_REGULATOR      1
  92
  93 extern const struct regmap_config bma400_regmap_config;
  94
  95 int bma400_probe(struct device *dev, struct regmap *regmap, const char *name);
  96
  97 int bma400_remove(struct device *dev);
  98
  99 #endif