mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 19:43:43 -04:00
0ecc363cce
Rename common module to inv_sensors_timestamp, add configuration at init (chip internal clock, acceptable jitter, ...) and update inv_icm42600 driver integration. Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20230606162147.79667-4-inv.git-commit@tdk.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) 2020 Invensense, Inc.
|
|
*/
|
|
|
|
#ifndef INV_SENSORS_TIMESTAMP_H_
|
|
#define INV_SENSORS_TIMESTAMP_H_
|
|
|
|
/**
|
|
* struct inv_sensors_timestamp_chip - chip internal properties
|
|
* @clock_period: internal clock period in ns
|
|
* @jitter: acceptable jitter in per-mille
|
|
* @init_period: chip initial period at reset in ns
|
|
*/
|
|
struct inv_sensors_timestamp_chip {
|
|
uint32_t clock_period;
|
|
uint32_t jitter;
|
|
uint32_t init_period;
|
|
};
|
|
|
|
/**
|
|
* struct inv_sensors_timestamp_interval - timestamps interval
|
|
* @lo: interval lower bound
|
|
* @up: interval upper bound
|
|
*/
|
|
struct inv_sensors_timestamp_interval {
|
|
int64_t lo;
|
|
int64_t up;
|
|
};
|
|
|
|
/**
|
|
* struct inv_sensors_timestamp_acc - accumulator for computing an estimation
|
|
* @val: current estimation of the value, the mean of all values
|
|
* @idx: current index of the next free place in values table
|
|
* @values: table of all measured values, use for computing the mean
|
|
*/
|
|
struct inv_sensors_timestamp_acc {
|
|
uint32_t val;
|
|
size_t idx;
|
|
uint32_t values[32];
|
|
};
|
|
|
|
/**
|
|
* struct inv_sensors_timestamp - timestamp management states
|
|
* @chip: chip internal characteristics
|
|
* @min_period: minimal acceptable clock period
|
|
* @max_period: maximal acceptable clock period
|
|
* @it: interrupts interval timestamps
|
|
* @timestamp: store last timestamp for computing next data timestamp
|
|
* @mult: current internal period multiplier
|
|
* @new_mult: new set internal period multiplier (not yet effective)
|
|
* @period: measured current period of the sensor
|
|
* @chip_period: accumulator for computing internal chip period
|
|
*/
|
|
struct inv_sensors_timestamp {
|
|
struct inv_sensors_timestamp_chip chip;
|
|
uint32_t min_period;
|
|
uint32_t max_period;
|
|
struct inv_sensors_timestamp_interval it;
|
|
int64_t timestamp;
|
|
uint32_t mult;
|
|
uint32_t new_mult;
|
|
uint32_t period;
|
|
struct inv_sensors_timestamp_acc chip_period;
|
|
};
|
|
|
|
void inv_sensors_timestamp_init(struct inv_sensors_timestamp *ts,
|
|
const struct inv_sensors_timestamp_chip *chip);
|
|
|
|
int inv_sensors_timestamp_update_odr(struct inv_sensors_timestamp *ts,
|
|
uint32_t period, bool fifo);
|
|
|
|
void inv_sensors_timestamp_interrupt(struct inv_sensors_timestamp *ts,
|
|
uint32_t fifo_period, size_t fifo_nb,
|
|
size_t sensor_nb, int64_t timestamp);
|
|
|
|
static inline int64_t inv_sensors_timestamp_pop(struct inv_sensors_timestamp *ts)
|
|
{
|
|
ts->timestamp += ts->period;
|
|
return ts->timestamp;
|
|
}
|
|
|
|
void inv_sensors_timestamp_apply_odr(struct inv_sensors_timestamp *ts,
|
|
uint32_t fifo_period, size_t fifo_nb,
|
|
unsigned int fifo_no);
|
|
|
|
static inline void inv_sensors_timestamp_reset(struct inv_sensors_timestamp *ts)
|
|
{
|
|
const struct inv_sensors_timestamp_interval interval_init = {0LL, 0LL};
|
|
|
|
ts->it = interval_init;
|
|
ts->timestamp = 0;
|
|
}
|
|
|
|
#endif
|