mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
ec74ae9fd3
Add a timestamping mechanism for buffer that provides accurate event timestamps when using watermark. This mechanism estimates device internal clock by comparing FIFO interrupts delta time and device elapsed time computed by parsing FIFO data. Take interrupt timestamp in hard irq handler and add IIO device specific timestamp structures in device private allocation. Signed-off-by: Jean-Baptiste Maneyrol <jmaneyrol@invensense.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
396 lines
14 KiB
C
396 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2020 Invensense, Inc.
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*/
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#ifndef INV_ICM42600_H_
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#define INV_ICM42600_H_
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#include <linux/bits.h>
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#include <linux/bitfield.h>
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#include <linux/regmap.h>
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#include <linux/mutex.h>
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#include <linux/regulator/consumer.h>
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#include <linux/pm.h>
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#include <linux/iio/iio.h>
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#include "inv_icm42600_buffer.h"
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enum inv_icm42600_chip {
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INV_CHIP_ICM42600,
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INV_CHIP_ICM42602,
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INV_CHIP_ICM42605,
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INV_CHIP_ICM42622,
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INV_CHIP_NB,
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};
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/* serial bus slew rates */
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enum inv_icm42600_slew_rate {
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INV_ICM42600_SLEW_RATE_20_60NS,
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INV_ICM42600_SLEW_RATE_12_36NS,
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INV_ICM42600_SLEW_RATE_6_18NS,
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INV_ICM42600_SLEW_RATE_4_12NS,
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INV_ICM42600_SLEW_RATE_2_6NS,
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INV_ICM42600_SLEW_RATE_INF_2NS,
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};
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enum inv_icm42600_sensor_mode {
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INV_ICM42600_SENSOR_MODE_OFF,
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INV_ICM42600_SENSOR_MODE_STANDBY,
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INV_ICM42600_SENSOR_MODE_LOW_POWER,
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INV_ICM42600_SENSOR_MODE_LOW_NOISE,
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INV_ICM42600_SENSOR_MODE_NB,
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};
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/* gyroscope fullscale values */
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enum inv_icm42600_gyro_fs {
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INV_ICM42600_GYRO_FS_2000DPS,
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INV_ICM42600_GYRO_FS_1000DPS,
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INV_ICM42600_GYRO_FS_500DPS,
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INV_ICM42600_GYRO_FS_250DPS,
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INV_ICM42600_GYRO_FS_125DPS,
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INV_ICM42600_GYRO_FS_62_5DPS,
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INV_ICM42600_GYRO_FS_31_25DPS,
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INV_ICM42600_GYRO_FS_15_625DPS,
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INV_ICM42600_GYRO_FS_NB,
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};
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/* accelerometer fullscale values */
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enum inv_icm42600_accel_fs {
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INV_ICM42600_ACCEL_FS_16G,
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INV_ICM42600_ACCEL_FS_8G,
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INV_ICM42600_ACCEL_FS_4G,
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INV_ICM42600_ACCEL_FS_2G,
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INV_ICM42600_ACCEL_FS_NB,
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};
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/* ODR suffixed by LN or LP are Low-Noise or Low-Power mode only */
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enum inv_icm42600_odr {
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INV_ICM42600_ODR_8KHZ_LN = 3,
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INV_ICM42600_ODR_4KHZ_LN,
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INV_ICM42600_ODR_2KHZ_LN,
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INV_ICM42600_ODR_1KHZ_LN,
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INV_ICM42600_ODR_200HZ,
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INV_ICM42600_ODR_100HZ,
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INV_ICM42600_ODR_50HZ,
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INV_ICM42600_ODR_25HZ,
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INV_ICM42600_ODR_12_5HZ,
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INV_ICM42600_ODR_6_25HZ_LP,
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INV_ICM42600_ODR_3_125HZ_LP,
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INV_ICM42600_ODR_1_5625HZ_LP,
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INV_ICM42600_ODR_500HZ,
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INV_ICM42600_ODR_NB,
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};
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enum inv_icm42600_filter {
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/* Low-Noise mode sensor data filter (3rd order filter by default) */
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INV_ICM42600_FILTER_BW_ODR_DIV_2,
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/* Low-Power mode sensor data filter (averaging) */
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INV_ICM42600_FILTER_AVG_1X = 1,
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INV_ICM42600_FILTER_AVG_16X = 6,
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};
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struct inv_icm42600_sensor_conf {
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int mode;
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int fs;
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int odr;
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int filter;
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};
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#define INV_ICM42600_SENSOR_CONF_INIT {-1, -1, -1, -1}
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struct inv_icm42600_conf {
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struct inv_icm42600_sensor_conf gyro;
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struct inv_icm42600_sensor_conf accel;
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bool temp_en;
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};
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struct inv_icm42600_suspended {
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enum inv_icm42600_sensor_mode gyro;
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enum inv_icm42600_sensor_mode accel;
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bool temp;
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};
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/**
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* struct inv_icm42600_state - driver state variables
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* @lock: lock for serializing multiple registers access.
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* @chip: chip identifier.
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* @name: chip name.
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* @map: regmap pointer.
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* @vdd_supply: VDD voltage regulator for the chip.
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* @vddio_supply: I/O voltage regulator for the chip.
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* @orientation: sensor chip orientation relative to main hardware.
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* @conf: chip sensors configurations.
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* @suspended: suspended sensors configuration.
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* @indio_gyro: gyroscope IIO device.
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* @indio_accel: accelerometer IIO device.
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* @buffer: data transfer buffer aligned for DMA.
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* @fifo: FIFO management structure.
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* @timestamp: interrupt timestamps.
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*/
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struct inv_icm42600_state {
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struct mutex lock;
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enum inv_icm42600_chip chip;
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const char *name;
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struct regmap *map;
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struct regulator *vdd_supply;
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struct regulator *vddio_supply;
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struct iio_mount_matrix orientation;
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struct inv_icm42600_conf conf;
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struct inv_icm42600_suspended suspended;
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struct iio_dev *indio_gyro;
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struct iio_dev *indio_accel;
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uint8_t buffer[2] ____cacheline_aligned;
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struct inv_icm42600_fifo fifo;
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struct {
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int64_t gyro;
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int64_t accel;
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} timestamp;
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};
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/* Virtual register addresses: @bank on MSB (4 upper bits), @address on LSB */
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/* Bank selection register, available in all banks */
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#define INV_ICM42600_REG_BANK_SEL 0x76
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#define INV_ICM42600_BANK_SEL_MASK GENMASK(2, 0)
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/* User bank 0 (MSB 0x00) */
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#define INV_ICM42600_REG_DEVICE_CONFIG 0x0011
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#define INV_ICM42600_DEVICE_CONFIG_SOFT_RESET BIT(0)
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#define INV_ICM42600_REG_DRIVE_CONFIG 0x0013
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#define INV_ICM42600_DRIVE_CONFIG_I2C_MASK GENMASK(5, 3)
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#define INV_ICM42600_DRIVE_CONFIG_I2C(_rate) \
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FIELD_PREP(INV_ICM42600_DRIVE_CONFIG_I2C_MASK, (_rate))
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#define INV_ICM42600_DRIVE_CONFIG_SPI_MASK GENMASK(2, 0)
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#define INV_ICM42600_DRIVE_CONFIG_SPI(_rate) \
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FIELD_PREP(INV_ICM42600_DRIVE_CONFIG_SPI_MASK, (_rate))
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#define INV_ICM42600_REG_INT_CONFIG 0x0014
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#define INV_ICM42600_INT_CONFIG_INT2_LATCHED BIT(5)
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#define INV_ICM42600_INT_CONFIG_INT2_PUSH_PULL BIT(4)
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#define INV_ICM42600_INT_CONFIG_INT2_ACTIVE_HIGH BIT(3)
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#define INV_ICM42600_INT_CONFIG_INT2_ACTIVE_LOW 0x00
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#define INV_ICM42600_INT_CONFIG_INT1_LATCHED BIT(2)
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#define INV_ICM42600_INT_CONFIG_INT1_PUSH_PULL BIT(1)
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#define INV_ICM42600_INT_CONFIG_INT1_ACTIVE_HIGH BIT(0)
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#define INV_ICM42600_INT_CONFIG_INT1_ACTIVE_LOW 0x00
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#define INV_ICM42600_REG_FIFO_CONFIG 0x0016
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#define INV_ICM42600_FIFO_CONFIG_MASK GENMASK(7, 6)
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#define INV_ICM42600_FIFO_CONFIG_BYPASS \
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FIELD_PREP(INV_ICM42600_FIFO_CONFIG_MASK, 0)
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#define INV_ICM42600_FIFO_CONFIG_STREAM \
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FIELD_PREP(INV_ICM42600_FIFO_CONFIG_MASK, 1)
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#define INV_ICM42600_FIFO_CONFIG_STOP_ON_FULL \
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FIELD_PREP(INV_ICM42600_FIFO_CONFIG_MASK, 2)
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/* all sensor data are 16 bits (2 registers wide) in big-endian */
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#define INV_ICM42600_REG_TEMP_DATA 0x001D
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#define INV_ICM42600_REG_ACCEL_DATA_X 0x001F
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#define INV_ICM42600_REG_ACCEL_DATA_Y 0x0021
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#define INV_ICM42600_REG_ACCEL_DATA_Z 0x0023
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#define INV_ICM42600_REG_GYRO_DATA_X 0x0025
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#define INV_ICM42600_REG_GYRO_DATA_Y 0x0027
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#define INV_ICM42600_REG_GYRO_DATA_Z 0x0029
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#define INV_ICM42600_DATA_INVALID -32768
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#define INV_ICM42600_REG_INT_STATUS 0x002D
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#define INV_ICM42600_INT_STATUS_UI_FSYNC BIT(6)
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#define INV_ICM42600_INT_STATUS_PLL_RDY BIT(5)
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#define INV_ICM42600_INT_STATUS_RESET_DONE BIT(4)
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#define INV_ICM42600_INT_STATUS_DATA_RDY BIT(3)
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#define INV_ICM42600_INT_STATUS_FIFO_THS BIT(2)
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#define INV_ICM42600_INT_STATUS_FIFO_FULL BIT(1)
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#define INV_ICM42600_INT_STATUS_AGC_RDY BIT(0)
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/*
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* FIFO access registers
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* FIFO count is 16 bits (2 registers) big-endian
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* FIFO data is a continuous read register to read FIFO content
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*/
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#define INV_ICM42600_REG_FIFO_COUNT 0x002E
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#define INV_ICM42600_REG_FIFO_DATA 0x0030
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#define INV_ICM42600_REG_SIGNAL_PATH_RESET 0x004B
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#define INV_ICM42600_SIGNAL_PATH_RESET_DMP_INIT_EN BIT(6)
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#define INV_ICM42600_SIGNAL_PATH_RESET_DMP_MEM_RESET BIT(5)
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#define INV_ICM42600_SIGNAL_PATH_RESET_RESET BIT(3)
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#define INV_ICM42600_SIGNAL_PATH_RESET_TMST_STROBE BIT(2)
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#define INV_ICM42600_SIGNAL_PATH_RESET_FIFO_FLUSH BIT(1)
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/* default configuration: all data big-endian and fifo count in bytes */
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#define INV_ICM42600_REG_INTF_CONFIG0 0x004C
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#define INV_ICM42600_INTF_CONFIG0_FIFO_HOLD_LAST_DATA BIT(7)
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#define INV_ICM42600_INTF_CONFIG0_FIFO_COUNT_REC BIT(6)
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#define INV_ICM42600_INTF_CONFIG0_FIFO_COUNT_ENDIAN BIT(5)
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#define INV_ICM42600_INTF_CONFIG0_SENSOR_DATA_ENDIAN BIT(4)
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#define INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK GENMASK(1, 0)
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#define INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_SPI_DIS \
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FIELD_PREP(INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK, 2)
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#define INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS \
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FIELD_PREP(INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK, 3)
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#define INV_ICM42600_REG_INTF_CONFIG1 0x004D
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#define INV_ICM42600_INTF_CONFIG1_ACCEL_LP_CLK_RC BIT(3)
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#define INV_ICM42600_REG_PWR_MGMT0 0x004E
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#define INV_ICM42600_PWR_MGMT0_TEMP_DIS BIT(5)
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#define INV_ICM42600_PWR_MGMT0_IDLE BIT(4)
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#define INV_ICM42600_PWR_MGMT0_GYRO(_mode) \
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FIELD_PREP(GENMASK(3, 2), (_mode))
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#define INV_ICM42600_PWR_MGMT0_ACCEL(_mode) \
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FIELD_PREP(GENMASK(1, 0), (_mode))
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#define INV_ICM42600_REG_GYRO_CONFIG0 0x004F
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#define INV_ICM42600_GYRO_CONFIG0_FS(_fs) \
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FIELD_PREP(GENMASK(7, 5), (_fs))
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#define INV_ICM42600_GYRO_CONFIG0_ODR(_odr) \
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FIELD_PREP(GENMASK(3, 0), (_odr))
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#define INV_ICM42600_REG_ACCEL_CONFIG0 0x0050
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#define INV_ICM42600_ACCEL_CONFIG0_FS(_fs) \
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FIELD_PREP(GENMASK(7, 5), (_fs))
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#define INV_ICM42600_ACCEL_CONFIG0_ODR(_odr) \
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FIELD_PREP(GENMASK(3, 0), (_odr))
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#define INV_ICM42600_REG_GYRO_ACCEL_CONFIG0 0x0052
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#define INV_ICM42600_GYRO_ACCEL_CONFIG0_ACCEL_FILT(_f) \
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FIELD_PREP(GENMASK(7, 4), (_f))
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#define INV_ICM42600_GYRO_ACCEL_CONFIG0_GYRO_FILT(_f) \
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FIELD_PREP(GENMASK(3, 0), (_f))
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#define INV_ICM42600_REG_TMST_CONFIG 0x0054
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#define INV_ICM42600_TMST_CONFIG_MASK GENMASK(4, 0)
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#define INV_ICM42600_TMST_CONFIG_TMST_TO_REGS_EN BIT(4)
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#define INV_ICM42600_TMST_CONFIG_TMST_RES_16US BIT(3)
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#define INV_ICM42600_TMST_CONFIG_TMST_DELTA_EN BIT(2)
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#define INV_ICM42600_TMST_CONFIG_TMST_FSYNC_EN BIT(1)
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#define INV_ICM42600_TMST_CONFIG_TMST_EN BIT(0)
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#define INV_ICM42600_REG_FIFO_CONFIG1 0x005F
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#define INV_ICM42600_FIFO_CONFIG1_RESUME_PARTIAL_RD BIT(6)
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#define INV_ICM42600_FIFO_CONFIG1_WM_GT_TH BIT(5)
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#define INV_ICM42600_FIFO_CONFIG1_TMST_FSYNC_EN BIT(3)
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#define INV_ICM42600_FIFO_CONFIG1_TEMP_EN BIT(2)
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#define INV_ICM42600_FIFO_CONFIG1_GYRO_EN BIT(1)
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#define INV_ICM42600_FIFO_CONFIG1_ACCEL_EN BIT(0)
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/* FIFO watermark is 16 bits (2 registers wide) in little-endian */
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#define INV_ICM42600_REG_FIFO_WATERMARK 0x0060
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#define INV_ICM42600_FIFO_WATERMARK_VAL(_wm) \
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cpu_to_le16((_wm) & GENMASK(11, 0))
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/* FIFO is 2048 bytes, let 12 samples for reading latency */
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#define INV_ICM42600_FIFO_WATERMARK_MAX (2048 - 12 * 16)
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#define INV_ICM42600_REG_INT_CONFIG1 0x0064
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#define INV_ICM42600_INT_CONFIG1_TPULSE_DURATION BIT(6)
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#define INV_ICM42600_INT_CONFIG1_TDEASSERT_DISABLE BIT(5)
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#define INV_ICM42600_INT_CONFIG1_ASYNC_RESET BIT(4)
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#define INV_ICM42600_REG_INT_SOURCE0 0x0065
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#define INV_ICM42600_INT_SOURCE0_UI_FSYNC_INT1_EN BIT(6)
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#define INV_ICM42600_INT_SOURCE0_PLL_RDY_INT1_EN BIT(5)
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#define INV_ICM42600_INT_SOURCE0_RESET_DONE_INT1_EN BIT(4)
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#define INV_ICM42600_INT_SOURCE0_UI_DRDY_INT1_EN BIT(3)
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#define INV_ICM42600_INT_SOURCE0_FIFO_THS_INT1_EN BIT(2)
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#define INV_ICM42600_INT_SOURCE0_FIFO_FULL_INT1_EN BIT(1)
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#define INV_ICM42600_INT_SOURCE0_UI_AGC_RDY_INT1_EN BIT(0)
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#define INV_ICM42600_REG_WHOAMI 0x0075
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#define INV_ICM42600_WHOAMI_ICM42600 0x40
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#define INV_ICM42600_WHOAMI_ICM42602 0x41
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#define INV_ICM42600_WHOAMI_ICM42605 0x42
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#define INV_ICM42600_WHOAMI_ICM42622 0x46
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/* User bank 1 (MSB 0x10) */
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#define INV_ICM42600_REG_SENSOR_CONFIG0 0x1003
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#define INV_ICM42600_SENSOR_CONFIG0_ZG_DISABLE BIT(5)
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#define INV_ICM42600_SENSOR_CONFIG0_YG_DISABLE BIT(4)
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#define INV_ICM42600_SENSOR_CONFIG0_XG_DISABLE BIT(3)
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#define INV_ICM42600_SENSOR_CONFIG0_ZA_DISABLE BIT(2)
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#define INV_ICM42600_SENSOR_CONFIG0_YA_DISABLE BIT(1)
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#define INV_ICM42600_SENSOR_CONFIG0_XA_DISABLE BIT(0)
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/* Timestamp value is 20 bits (3 registers) in little-endian */
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#define INV_ICM42600_REG_TMSTVAL 0x1062
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#define INV_ICM42600_TMSTVAL_MASK GENMASK(19, 0)
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#define INV_ICM42600_REG_INTF_CONFIG4 0x107A
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#define INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY BIT(6)
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#define INV_ICM42600_INTF_CONFIG4_SPI_AP_4WIRE BIT(1)
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#define INV_ICM42600_REG_INTF_CONFIG6 0x107C
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#define INV_ICM42600_INTF_CONFIG6_MASK GENMASK(4, 0)
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#define INV_ICM42600_INTF_CONFIG6_I3C_EN BIT(4)
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#define INV_ICM42600_INTF_CONFIG6_I3C_IBI_BYTE_EN BIT(3)
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#define INV_ICM42600_INTF_CONFIG6_I3C_IBI_EN BIT(2)
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#define INV_ICM42600_INTF_CONFIG6_I3C_DDR_EN BIT(1)
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#define INV_ICM42600_INTF_CONFIG6_I3C_SDR_EN BIT(0)
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/* User bank 4 (MSB 0x40) */
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#define INV_ICM42600_REG_INT_SOURCE8 0x404F
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#define INV_ICM42600_INT_SOURCE8_FSYNC_IBI_EN BIT(5)
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#define INV_ICM42600_INT_SOURCE8_PLL_RDY_IBI_EN BIT(4)
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#define INV_ICM42600_INT_SOURCE8_UI_DRDY_IBI_EN BIT(3)
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#define INV_ICM42600_INT_SOURCE8_FIFO_THS_IBI_EN BIT(2)
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#define INV_ICM42600_INT_SOURCE8_FIFO_FULL_IBI_EN BIT(1)
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#define INV_ICM42600_INT_SOURCE8_AGC_RDY_IBI_EN BIT(0)
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#define INV_ICM42600_REG_OFFSET_USER0 0x4077
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#define INV_ICM42600_REG_OFFSET_USER1 0x4078
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#define INV_ICM42600_REG_OFFSET_USER2 0x4079
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#define INV_ICM42600_REG_OFFSET_USER3 0x407A
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#define INV_ICM42600_REG_OFFSET_USER4 0x407B
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#define INV_ICM42600_REG_OFFSET_USER5 0x407C
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#define INV_ICM42600_REG_OFFSET_USER6 0x407D
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#define INV_ICM42600_REG_OFFSET_USER7 0x407E
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#define INV_ICM42600_REG_OFFSET_USER8 0x407F
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/* Sleep times required by the driver */
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#define INV_ICM42600_POWER_UP_TIME_MS 100
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#define INV_ICM42600_RESET_TIME_MS 1
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#define INV_ICM42600_ACCEL_STARTUP_TIME_MS 20
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#define INV_ICM42600_GYRO_STARTUP_TIME_MS 60
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#define INV_ICM42600_GYRO_STOP_TIME_MS 150
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#define INV_ICM42600_TEMP_STARTUP_TIME_MS 14
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#define INV_ICM42600_SUSPEND_DELAY_MS 2000
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typedef int (*inv_icm42600_bus_setup)(struct inv_icm42600_state *);
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extern const struct regmap_config inv_icm42600_regmap_config;
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extern const struct dev_pm_ops inv_icm42600_pm_ops;
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const struct iio_mount_matrix *
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inv_icm42600_get_mount_matrix(const struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan);
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uint32_t inv_icm42600_odr_to_period(enum inv_icm42600_odr odr);
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int inv_icm42600_set_accel_conf(struct inv_icm42600_state *st,
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struct inv_icm42600_sensor_conf *conf,
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unsigned int *sleep_ms);
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int inv_icm42600_set_gyro_conf(struct inv_icm42600_state *st,
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struct inv_icm42600_sensor_conf *conf,
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unsigned int *sleep_ms);
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int inv_icm42600_set_temp_conf(struct inv_icm42600_state *st, bool enable,
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unsigned int *sleep_ms);
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int inv_icm42600_debugfs_reg(struct iio_dev *indio_dev, unsigned int reg,
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unsigned int writeval, unsigned int *readval);
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int inv_icm42600_core_probe(struct regmap *regmap, int chip, int irq,
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inv_icm42600_bus_setup bus_setup);
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struct iio_dev *inv_icm42600_gyro_init(struct inv_icm42600_state *st);
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int inv_icm42600_gyro_parse_fifo(struct iio_dev *indio_dev);
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struct iio_dev *inv_icm42600_accel_init(struct inv_icm42600_state *st);
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int inv_icm42600_accel_parse_fifo(struct iio_dev *indio_dev);
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#endif
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