include/linux/timekeeping.h

1 /* SPDX-License-Identifier: GPL-2.0 */
25  * ktime_get() family - read the current time in a multitude of ways.
27  * The default time reference is CLOCK_MONOTONIC, starting at
28  * boot time but not counting the time spent in suspend.
29  * For other references, use the functions with "real", "clocktai",
32  * To get the time in a different format, use the ones with
35  * See Documentation/core-api/timekeeping.rst for more details.
76  * ktime_get_real - get the real (wall-) time in ktime_t format
78  * Returns: real (wall) time in ktime_t format
91  * ktime_get_boottime - Get monotonic time since boot in ktime_t format
94  * time spent in suspend.
96  * Returns: monotonic time since boot in ktime_t format
109  * ktime_get_clocktai - Get the TAI time of day in ktime_t format
111  * Returns: the TAI time of day in ktime_t format
152  * ktime_mono_to_real - Convert monotonic time to clock realtime
153  * @mono: monotonic time to convert
155  * Returns: time converted to realtime clock
163  * ktime_get_ns - Get the current time in nanoseconds
165  * Returns: current time converted to nanoseconds
173  * ktime_get_real_ns - Get the current real/wall time in nanoseconds
175  * Returns: current real time converted to nanoseconds
183  * ktime_get_boottime_ns - Get the monotonic time since boot in nanoseconds
193  * ktime_get_clocktai_ns - Get the current TAI time of day in nanoseconds
195  * Returns: current TAI time converted to nanoseconds
203  * ktime_get_raw_ns - Get the raw monotonic time in nanoseconds
205  * Returns: current raw monotonic time converted to nanoseconds
262  * struct ktime_timestamps - Simultaneous mono/boot/real timestamps
265  * @real:	Realtime timestamp
270 	u64		real;  member
274  * struct system_time_snapshot - simultaneous raw/real time capture with
277  * @real:	Realtime system time
278  * @raw:	Monotonic raw system time
280  * @clock_was_set_seq:	The sequence number of clock-was-set events
285 	ktime_t			real;  member
293  * struct system_device_crosststamp - system/device cross-timestamp
295  * @device:		Device time
296  * @sys_realtime:	Realtime simultaneous with device time
297  * @sys_monoraw:	Monotonic raw simultaneous with device time
306  * struct system_counterval_t - system counter value with the ID of the